Gas Pouring Out Of Carb Overflow






Tighten up shock cap. ps If you have a broken or bent reed valve it will also cause what you are describing. I added some gas and it started pouring out the carburetor's overflow lines. Those vibrations often loosened the hardware holding the carburetor together, which would pour raw gas either into the cylinders or down the hot engine block. I took off all the air cleaner stuff, and the little hoses that hook up to it. I took off the bowl and it looks clean. The middle and right picture is from Blender (2. I've got the same problem with a freshly built 327 I just put in my 66. You could get away with running a 650 CFM Holley. To test for this, pop the top off the carb, remove the power piston/rod assembly, and remove the power piston spring from its bore. When cranking, the motor runs for a few seconds blowing lots of smoke out the exhaust and you can see lots of gas in the breather opening. Too little fuel may cause the bike to run lean or not at all. Then turn the petcock back to the ON position and allow the tank to empty into the gas can until it is completely empty. NOW when I can get it started but it wont stay running at idle have to keep it rev-ed up, and the air pipe vent tube is shooting gas out of it. But I didn't see a screw on the Harley carb. So, to figure out how much citric acid (molar mass $\mathrm{192. Pulled fuel line off sediment bowl to carb and cleaned it. 8 quart of SAE 30 motor oil. '72 MGB - Fuel pouring out of vent line from front carb when the fuel pump is pumping. In an extreme case, if the floats are set too high, fuel will overflow via drillings inside the carb body. Gas all over me, all over my mower, and all over the garage floor. After my car runs for a few minutes, antifreeze pours out of the overflow. At worst, fuel fills the cylinder, eliminates compression and prevents the piston from moving. A suggestion - remove the float bowl from this carb (hopefully it is either the LH or RH carb so it will be easier to do with the carb on the bike). On one side of the carburetor, near the bottom, there is a tube that hangs and connects to nothing. Its a piece of junk. If it doesn't, you can push it down in the carb throat and it will fall out. I have now been messing with the carbs for about a week or more. · Connect a pipe extension to the engine exhaust pipe to direct the exhaust fumes out of the area. The carburetor float can become permanently stuck in the open position, which allows gas to flow up through the air filter and out of the mower. The fuel will start to get milky. Sometimes a gas leakage can be a symptom of a bad basket or a bad seal near the Cylinder. When the fuel level is correct, the needle will press up on the seat and stop any more fuel from entering the float bowl. Re: Fuel from carb overflow. Also, don't smoke around a bike that's dripping gas. Tightened them up real good, and silence followed. Discussion Starter • #1 • Jan 27, 2007. Other wise bike is in near mint condition. As I said, several causes may occur. Once it is out, thoroughly inspect the entire tank; check for sediment, rust or any holes. If you are leaking fuel the float is either not shutting off the gas or there is dirt in the needle and seat. Another common cause of gas leaking around air filters is due to carburetor issues. It had run dry. Won't restart. This is a discussion on Gas pouring out of carb overflow within the The Performance Tuning Shop forums, part of the Snowmobiles category; Went out for a ride with some friends tonight, wife riding her 99 Jag 340 with 1800 miles. Check if the float valve is stuck. Hi there, I have a 1979 Ford Econoline 100 van/w a 302 2 barrel carb. If the radiator is full and there is nothing coming out of the hole, you will have to fill the hole with fluid yourself. Take a small funnel or bulb syringe and pour/squirt the measured gas down the vent tube. Report the issue to the gas station manager. Usually the gasoline fills the carburetor bowl up to a certain level and then the carburetor float will lift the needle and close the valve so no more fuel will come i. The edger is a McLane with H35-45642U Tecumseh engine. Normally you'll get the overflow when you shut the bike down. When the petcock is off the gas just drips. 3 crank, it has a eaton m90 blower running at 7psi, it has one 2" HS8 SU with the highest flowing grose jet needle & seat valve, it has a KX needle wich is about as rich as i can get, very thin and fragile, i have just fitted a brand new needle and main jet becuase the last one was slightly bent. When gas enters the carb, it raises the float which in turn pushes up on the needle. I also like to work on a wooden surface because it absorbs the spilled gas and cleaners rather than pooling. I think the needle and seat are fine. I shut of the petcock, tap on the bowl with handle of a screwdriver, open the petcock and it's fine. My question is when I go to start the bike gas keeps leaking out of the carb overflow tube. So I put it all back together and turned on fuel and looked good ,it filled the bowl and nothing leaking out. Posted February 6, 2013. I have now been messing with the carbs for about a week or more. DON T SMOKE. I took it apart and checked and reset the float but still does the same thing. Now that coffee cans, and even larger glass bottles, are becoming hard to find, my workshop's pile of containers is mostly plastic. Today I went to start it up and as soon as I turn the gas on, gas goes pouring out of the overflow tubes on the carb. The floats look great, the carb bowl was filled with gas, I. I have experienced this problem before and resolved it by thumping on the carb bowl with a rubber handel. Either blow out the nozzle, or place a small piece of wire through the tip to unclog it. Then turn on your fuel valve, then gently push up on the float and see if the fuel flow does stop. Inspection points: Rubber tip of the float valve should show no pits, or a circle of wear Metal tip as base of float needle is spring loaded, and is sometimes stuck. Fuel leaking through the overflow tube on the right side carb. Never overfill a gas can-- it is better to in fact purposely undersell the can slightly to ensure it does not overflow, spilling fuel. I would guess my float is stuck but I am just ok with fixes. Putting a larger carb will kill the velocity, hence hurting low end performance and torque. it was so rich it wouldn't run. Purge Bulb: Forces air out of system when depressed, and draws fuel in from tank when released. I pulled the float bowl off the carb and found some dirt in it so I. When was the last time you have ridden the scooter? If it has been over a week, there is a good chance you have clogged jets. Clean area around oil fill plug (see Figure 1). Could this be the reason why there is overflow now. Crud can get stuck in there and cause the float needle to NOT seat properly causing gas to constantly flow into the float bowl. Put it back together and it was ok. Today I when I started it I smell gas and noticed gas pouring out of the overflow tube, when i shut off the gas it stopped. Remember - NO SMOKING or other activities that could ignite the fuel while working on carbs! The float valve is not sealing. I can see it as he is riding past me. The way it is now, even if you had a teaspoon of gas in the fuel bowl, it would drain out this tube. Does fuel start pouring out when trying to start?. Took off the air cleaner and the carb was smoking, not from fire but from gas being dumped into the engine. The overflow problem is a carb float being stuck open. Even if the petcock was off, if it seeps a tiny bit, it could do this. The fuel will start to get milky. I finally got the engine to turn over but it wont start. it would also be a good idea to put an inline fuel filter on it if it doesnt have one already. Let it sit for a day. open the screw and fill the radiator until fluid comes out. Once it's barely dripping. I tried hitting the flost cover , took the drain plug out and pouring some carb cleaner inside but the float still wasnt working properly. and carb starts leaking. Turned the petcock off, it stopped of course. I took it out and lightly scraped the edges of the needle with my fingernail and reinstalled it and have had no problems since. gas pouring out of overflow lines fast and steady? - posted in Vintage Ski Doo's: Rebuilt a Mikuni 34 and thought I did a great job as the sled starts and runs great. I tried putting new plugs in and that didn't help either, I never got it to fire again after that. I'll give it another crack tomorrow and check the float needles again. Went out in the garage last night, and saw a large puddle of gas under the bike. everything looks fine. That should be set wherever it idles right. my mikuni carb is pouring gas out of the overflow on the bottom of the carb and then when i give it gas it stops pouring out and when i let off the gas it starts pouring out again and i cleaned it up … read more. now bend the tube and hold it up right so no fuel leaks out, the hose should be vertical now, but still connected to the drain. You could get away with running a 650 CFM Holley. Shut off the gas. I fired bike up last week started riding after about 4 miles gas started leaking out of carb overflow tube. Sometimes gas will drip to almost steady flow out of the port in the bottom of the carb bowl. You have dirt stuck under the inlet needle. Today I went to start it up and as soon as I turn the gas on, gas goes pouring out of the overflow tubes on the carb. If all of this checks out, then you will probably need to rebuild the carb. Let it sit for a day. I just completed a top end rebuild and have it all together. They are pouring over the exhaust system and yes, I've just read your suggestion about making those vent pipes. The carburetor's internal fuel level is directly correlated to the float height, as determined by the float's tang. Even if the petcock was off, if it seeps a tiny bit, it could do this. This will insure a fast start up. If your carburetor is leaking gas from the overflow tube, then this video will tell you how to solve that issue and what is causing that to happen!! The part. I've got a 350 330hp with a 600 cfm Holley Carb on it. Sounds like the float valve needle is sticking Also if you have had gas in in the carbs in the last 3 months Try cleaning the passages out in the float lidesp if you see any white powder crystal carpsure sign of the fuel going off and trying to clog your fuel system. I fired bike up last week started riding after about 4 miles gas started leaking out of carb overflow tube. When I got all the air out of lines I started it up and would run 30 seconds and quit. I soon smelled gas and found gas coming out through the overflow on the top of the carburator (beneath the valve plate). 9 Quarts of new SAE 30 per specs. The low pressure fuel pump feeds fuel to the VST, and the inlet to the VST is via a float valve (like the fuel bowl of a carburetor). If the seat and/or the needle is dirty, fuel will seep past, over flow the bowl and run out the overflow tube. Shut off the gas. The ethanol that is added to fuel attracts water. Sure enough fuel was pouring out of the overflow tube. This allows gasoline to overfill the carb and run down into, and flood, the engine. I'm going to purchase a rad cap, do the bi carb trick, and check out the heater this weekend. I am still getting the flooding problem. Fuel pump sounds good, when I have my aux. If fuel is pouring out of the overflow your float valve is malfunctioning. If the leak is coming from the bottom of the carburetor, try replacing the carbure tor bowl gasket. I am sure that the fuel is coming out of the overflow / vent tube that is on the back end of the tank under the front edge of the seat. 42-7 1990 to 1999 1340 Big Twin Evo with stock CV type manifold. Shut it down and smelled gas. I took the bleed screw out of side of the ejector pump and fuel just pour out and the tractor would run. I soon smelled gas and found gas coming out through the overflow on the top of the carburator (beneath the valve plate). Rating sample for this Honda bike Racing track capabilities for the 1983 Honda CB 650 SC Nighthawk: (59. Question: I used a 2-stroke line trimmer without oil now the machine won't start. Carb Pouring Gas From Overflow. It is a 40mm Mikuni and it's coming out the overflow line right next to the choke cable. It's basically a on the bike carb cleaning, and running seafoam through will clean out all the build up shit out of the head and pipes. 9 Quarts of new SAE 30 per specs. Today I went to start it up and as soon as I turn the gas on, gas goes pouring out of the overflow tubes on the carb. As it sits I see gas slowing coming out the overflow lines. now bend the tube and hold it up right so no fuel leaks out, the hose should be vertical now, but still connected to the drain. '72 MGB - Fuel pouring out of vent line from front carb when the fuel pump is pumping. Worn or stuck float valves are very common following prolonged storage or when gasoline has been allowed to sit inside the carburetor and begins to lacquer with age. Disconncet the fuel line from the carburetor to make sure fuel is getting to it. Any air or vapour in the fuel takes up space that would otherwise be liquid fuel, but when it gets to the float chamber is lost out the vent, so the fuel pump must stroke more often to keep up the supply of liquid fuel. There will be a flathead screw on the other side of it. Usually the gasoline fills the carburetor bowl up to a certain level and then the carburetor float will lift the needle and close the valve so no more fuel will come i. If you clicked on this page thinking you were going to find some miracle product you could pour in your gas tank that would solve all your carburetor woes, you were mistaken. Stripped the carb down again, checked everything and noticed the overflow pipe was very close to the float and causing it to rub slightly so i bent it out of the way. Replace the float bowl gaskets. When the needle is worn, fuel continues to flow and it will either start pouring out the carburetor overflow and onto the ground, or it may fill the engine and airbox with fuel. You also may need to remove the float bowl from the bottom of the carburetor to get the debris out. Put new gas in the tank, turned the fuel flow to on. When full, tighten screw and continue filling radiator. C - The adjustment screw for changing your idle rpm. everything looks fine. I nursed bike home removed bowl on carb noticed some sediment. There are two ways to do this. If there is too much fuel, the carb may overflow or it may flood the needle jet causing a rich condition. And a woman comes running in saying "a motorcycle outside is leaking gas all over the parking lot". line, primer bulb, filter (if it has one), cut of valve, or tank. If it leaks, it may just be the float needle is damaged. My bike does not have the carb overflow tubes. The overflow problem is a carb float being stuck open. Never overfill a gas can-- it is better to in fact purposely undersell the can slightly to ensure it does not overflow, spilling fuel. Shut off the gas. Step 2: Next, pour a cup of baking soda and 1 cup water/1 cup vinegar solution. The ethanol that is added to fuel attracts water. Do i need to take the whol carb off for this?. But I didn't see a screw on the Harley carb. Once that canister becomes full of gas, the pressure continues to build, eventually forcing fuel out of the canister, through the vent lines, into the carb and intake manifold, eventually exiting through your air box. This is important if the float sticks. · Connect a pipe extension to the engine exhaust pipe to direct the exhaust fumes out of the area. Re: Fuel from carb overflow. Turn the petcock to the off position, remove the fuel line from the petcock, loosen the screw on the bottom of the float bowl, drain out the gas, tighten the screw, fill the carb full of SEAFOAM (great stuff) through the fuel line and let it soak for 24 hours, then drain it out, tighten the drain screw, put the fuel line back on the carb, and. This needs to end, and end quick. said 2010-09-21 10:54 s&s super e carb pouring gas bike sounds flat : Answer this message Show discussion overview. A Few Words About Fuel. Im pretty sure the plugs are bad. I just bought a rebel and it has been sitting for 2 years out of the weather. Fill plug on top of Outlaw 5400 Once the system is filled with oil, lift rear of mower until. I don’t feel any gas in float when I shake. I found out that the bowl was overfilling so the carb was getting flooded with gas. When trying to start, it pours gas out of the overflow tube and will. I assume only vapor is supposed to flow through this line, but obviously something is wrong. As time went on it just got worse and worse until the carbs would actually overflow with fuel. NOW when I can get it started but it wont stay running at idle have to keep it rev-ed up, and the air pipe vent tube is shooting gas out of it. You could remove the line from the tank to the pump and connect a vacuum pressure gauge. Would not restart. I recently replaced my petcock. IF you get the carb problem fixed, an oil change is required before you ride it. 0 out of 100) Click here for complete rating. Figured it would be a good time to clean/rebuild the carb since the truck was sitting for 10 years. fuel from under ground is cold and dense and will expand after warms up?. I recently changed the screen in my tank for my 02 Dyna. Dellorto PHBG 19mm. Re:'82 KZ1000 fuel pouring out of the air filter Problem #1-First and foremost the carb float may be moving freely but the needle that the float is attached to sometimes can get debris between the needle and the seat, thus not shutting off the flow of fuel. This valve can get stuck sometimes because of dirt. Idled for 5 min Turned off and sure enough fuel. When this happens, fuel from the tank will seep through the carburetor and overflow the float bowl. When this occurs, it means the floats are stuck or you have a clogged jet. I can't tell, it seems to be coming from the inside of Carb 1 where it's joined to the fuel tube, or it could be at both Carb 1 and 2 right there on that left-most fuel tube. Gas Pressure Washer: Water sprays out of the pressure relief valve If the pressure washer runs for more than 5 minutes when the spray wand isn't in use, the water in the pump often overheats, causing the thermal relief valve to open and discharge hot water onto the ground. Re: Fuel from carb overflow. I had a similar problem with my R80G/S last fall. A few days later I went on a 30 mile ride and the Rhino did fine. Those vibrations often loosened the hardware holding the carburetor together, which would pour raw gas either into the cylinders or down the hot engine block. I've got the same problem with a freshly built 327 I just put in my 66. Took it for a ride, and as soon as I stopped it started doing it again. Now that coffee cans, and even larger glass bottles, are becoming hard to find, my workshop's pile of containers is mostly plastic. I have a 1990 883 that was converted to 1200. I have a 2014 Suzuki df60 and today after a 12 mile run I noticed gas in the water surrounding my, this is after it was turned off. Let the fuel drain out and then open the fuel valve ie. It will practically eliminate any wasteful overflow or spills. But I didn't see a screw on the Harley carb. Of course sometimes I will remove the dust cap and lift on the rod so that I can tell if the carb is getting gas. But I still am running into the issue of gas pouring out of the overflow tube when I turn the gas on. 42-18 1999 to present Twin Cam, 199 0to ‘99 Big Twin Evo Includes 42mm carb, air box adapter, instructions. I took off all the air cleaner stuff, and the little hoses that hook up to it. Assuming you didn't mess up the carb install, that only really leaves the fuel. Put new sediment bowl on gas tank. When your outboard carburetor is funky, with aging, cracked gaskets and poor fuel flow that's affecting the performance of your Mercury 115, it's time to pick up a carburetor rebuild kit, break out the toolbox, pour some carburetor cleaner in a pan and rebuild the carburetor. and fuel still leaks out the bleed holes on top of the carb, the hose fitting in the middle of the 2 carb openings, and the fuel line that drains out at the bottom of the motor. Fuel pump diaphragms stroke at the speed it takes to keep the carburetor float chambers full. I would recommend this product to my friends in the lawn mowing business. everything looks fine. A generator will leak gasoline from the air filter assembly if there is an improper seal being made with the float needle valve seat in the carburetor. Fuel tank is above the carb, so fuel flows to the bowl, once the bowl is full it's flowing out the carb into the engine or out the filter to the ground. why is gas pouring from my exhaust pipe?. the needle cant seat properly and shut the flow of fuel off to the carb, thats why its coming out of the overflow tube. Then turn the petcock back to the ON position and allow the tank to empty into the gas can until it is completely empty. The fuel then will flow out the throat of the carburetor and through the air filter and then you will see it dripping from the air box cover. On pouring out the oil I noticed that the oil had a massive amount of gas in it, and it's good I went ahead and changed it. Turn the petcock to the off position, remove the fuel line from the petcock, loosen the screw on the bottom of the float bowl, drain out the gas, tighten the screw, fill the carb full of SEAFOAM (great stuff) through the fuel line and let it soak for 24 hours, then drain it out, tighten the drain screw, put the fuel line back on the carb, and. It means that the needle valve in the fuel bowel is stuck in the open position. Hold the float gently up to simulate a full float bowl and connect the gas line to the carb. Stripped the carb down again, checked everything and noticed the overflow pipe was very close to the float and causing it to rub slightly so i bent it out of the way. Bike sat in garage for 1 season without being started. I was advised to weigh the float (using a postal meter) and turned out that it had taken on weight (I was told ethanol related) and was no longer within spec. This will minimize but not solve the issue. After installing the carb and filling the fuel tank ,  fuel starts streaming out of the carb vent hole. The gas went in dirty and came out clean. Both look like they may have gone in next to the needle and seat but I didn't want to try to pry the old one out and don't have a tool to install the new ones. Screw that lines up with the carb slide is the idle adjustment. Atmospheric Vent Hole: Allows atmospheric pressure onto dry side Of metering diaphragm assembly. Last two are where tapping works. Once it is out, thoroughly inspect the entire tank; check for sediment, rust or any holes. To fix this problem, remove the float pin and float. However, yesterday when I started the Rhino, it missed/sputtered and I noticed gas pouring out of the overflow hose. And check out the rating of the bike's engine performance, repair costs, etc. Easier to run the bike empty of fuel by shutting the gas off and letting it idle until it dies. D Tried riding it but it is hard to keep idiling since most gas is coming out. Debris or Blockage. The carburetor was flooding out. Re: Fuel from carb overflow. This allows gasoline to overfill the carb and run down into, and flood, the engine. I nursed bike home removed bowl on carb noticed some sediment. Needle/seat could be stuck, something stuck in it, float could've sunk, air bleeds all clogged with dirt, inside of carb gummed up by varnished gas, etc. Water at the bottom of the pot being heated very rapidly forms a gas at the bottom of the pot underneath all of the oil. Hi I am picking up my new rev3 on Friday and was just wondering if they still have the problem of the float not closing the inlet for fuel of soon enough and pouring fuel out the overflow or has beta fixed it? cheers. The way it is now, even if you had a teaspoon of gas in the fuel bowl, it would drain out this tube. I tried heating up the carbs with a blowdryer, but still had no luck. As time went on it just got worse and worse until the carbs would actually overflow with fuel. Remember that 1 gram of sodium bicarboncate is 0. Fuel tank is above the carb, so fuel flows to the bowl, once the bowl is full it's flowing out the carb into the engine or out the filter to the ground. When was the last time you have ridden the scooter? If it has been over a week, there is a good chance you have clogged jets. I tried hitting the flost cover , took the drain plug out and pouring some carb cleaner inside but the float still wasnt working properly. 00) and the problem is solved. However, yesterday when I started the Rhino, it missed/sputtered and I noticed gas pouring out of the overflow hose. Oh yeah, it is a 1970 cb350. Check to make sure the petcock runs free. By lifting up on the rod eventially gas will come pouring out and I know that there is gas in the vacuum tank. As for your leaking issue, the "Vent" you speak of on the bottom of the carb is a drain for the air inlet so when fuel leaks into or builds up in the air inlet, it has a place to drain out. Killed it, turned the gas off, and took a look. Jump to Latest Follow 1 - 7 of 7 Posts. Usually the gasoline fills the carburetor bowl up to a certain level and then the carburetor float will lift the needle and close the valve so no more fuel will come i. I did rebuild the carb with a Moose kit. That should be set wherever it idles right. Then pour out the old oil into a container and mark the level it reaches. You just as well take the carb off (and apart) and remove the jets, soak it in carb cleaner, and blow all the jets out with compressed air. Does it when scooter is sitting ( no running ). Another common cause is the use of fuel containing any Ethanol. Is there a way to display only the first part of the text output, to get the "gist" of what is being output. Put in another and your troubles will be over. Flooding is when excess gasoline gets into the cylinders. Try putting the carb back together, re-install it on the engine and turn on the fuel shut-off valve but don't start the engine. With the carburetor itself, push the carb cleaner through where the inlet needle is and where the fuel flow comes in to flush out any dirt or derbis. If gas is pouring out of the carb overflow, then the most likely culprit is the float valve is either stuck open or has some debris preventing it from closing. This prevented gas from pouring out of the carb when the engine was shut down. Remember that 1 gram of sodium bicarboncate is 0. One tube from the fuel pump sucks the fuel up and pumps it into the overflow type carburetor and then a return tube runs the overflow back in to the can. Find the one bolt along the bottom and remove it. Both look like they may have gone in next to the needle and seat but I didn't want to try to pry the old one out and don't have a tool to install the new ones. If I push the float up, gas stops flowing. If, however, the chamber air vent is blocked, the fuel rising compresses the air in the chamber and fuel is forced out of the jet at pump pressure. It will practically eliminate any wasteful overflow or spills. The "weep" hole is actually a vent hole for the carburetor to draw air into. There is really no substitute for removing the carbs from the bike and giving them a proper hand cleaning. 1) Does the missing fuel filter have anything to do with this? OR 2) As I have read in my research, I over-tightened the carb drain screw and broke something OR. When gas enters the carb, it raises the float which in turn pushes up on the needle. If you are leaking fuel the float is either not shutting off the gas or there is dirt in the needle and seat. Does it when scooter is sitting ( no running ). If the floats do not shut off the fuel then gas will start coming out of the back of the carbs. Scooter idles and dies. Gasoline is a necessity in many industries. Includes 42mm carb, airbox adapter and chrome cover. Good luck!. Then the engine ran fine for about 2 min, then died as if it ran out of gas. When was the last time you have ridden the scooter? If it has been over a week, there is a good chance you have clogged jets. I am thinking the tube inside the tank may have a hole or crack in it allowing fuel to enter and flow out until the level has dropped below that point. This needs to end, and end quick. Any ideas????. Was running great then started leaking fuel from overflow tube from the bottom of carb and died. and carb starts leaking. Oh yeah, it is a 1970 cb350. Ok so when I removed the airfilter a lot of gas came out of the bike , its weird because I havent messed with the carb since like 3000 miles. If oil level is not up to overflow point in oil fill hole, add recommended oil. If its still pouring out, then I dont think you have set the float height correctly, use a clear pipe attached to the overflow on bowl, hold up, and slacken the drain screw, fuel will fill the pipe to the level in the bowl, should be in line with bowl joint. The only reason for gas to be coming out would be the carb overflowing due to sticking/dirty float valve, bad o-ring etc. If so a good rap on the carb will usually stop it. Gas will pour out that tube instead of continuing to flow into the engine when the float is stuck open. Take a small funnel or bulb syringe and pour/squirt the measured gas down the vent tube. Depending on the type of engine, this may be simple or complex. If you can remove the air filter from the engine and squirt about 1/2-1 ounce of fresh gas right into carb. On a marine carb, the overflow tubes will go up from the float bowls and turn 180 degrees to form a "U" thus pouring any bowl overflow down the throat of the carb instead of spilling on top of your intake manifold. I had this happen once to my 400ex carb. Perhaps someone can tell me if I have committed some cardinal carb sin that will doom my poor little car a few miles down the road: 1 - Hooked a "vent line" on the first carb's fuel bowl. The slow pumping means their filters need to be replaced, and if the rate of flow is very low, the return sensor may not trigger, causing the tank to overflow - either that or the return hole (essentially a venturi pipe with a spring trigger) is not working at all. Took it for a ride, and as soon as I stopped it started doing it again. This also results in the float needle allowing fuel to pass into the float bowl unabated. I don’t feel any gas in float when I shake. Ok, I don't think it's your float sticking. I've got a 350 330hp with a 600 cfm Holley Carb on it. Flooding will be more likely to happen along with gas out of the throat when primed more to get a start. Then the engine ran fine for about 2 min, then died as if it ran out of gas. What could be the. Gas is the primary fuel used to make most engine-powered vehicles work. It could have a washed look as well. You just as well take the carb off (and apart) and remove the jets, soak it in carb cleaner, and blow all the jets out with compressed air. I do not think there is gas in the float, but I am not 100% sure. You will need to clean all that crap out. While riding last week my bike started cutting out. I just completed a top end rebuild and have it all together. There is really no substitute for removing the carbs from the bike and giving them a proper hand cleaning. Gas-powered lawn mowers can be full of surprises. Loosen the little screw there and it will drain all the fuel out of the carb. Joined Jan 8, 2007 · 47 Posts. Out of gas? b. As time went on it just got worse and worse until the carbs would actually overflow with fuel. I thought I was about out of gas so I pulled in. I have the gas tank cap off. 5 out of 5 stars (2) 2 product ratings - Carburetor Autoline C941A. Unless grossly out of adjustment, adding or subtracting fiber washers under the float needles (2 each carb) will modify the fuel level in their respective bowls. I had a similar problem with my R80G/S last fall. When I go to rev it up, the faster the motor runs, the faster it is flying out the hole getting gas all over. Gas out of the throat is pretty normal. After you have made sure that all the jets are clean, and once you have sprayed out the passages in the carburetor body, then you can put the float bowl back on. Beginner Class : Join Date: Jun 2013. could be misadjusted float height, or could be worn valve or valve seat. To test for this, pop the top off the carb, remove the power piston/rod assembly, and remove the power piston spring from its bore. Screw that lines up with the carb slide is the idle adjustment. If the float sticks or a small foreign body causes the needle valve not to close, then the tank can overfill and overflow out the vent tube. Once the petcock is "off" you'll notice gas leaking out of the face of the petcock. Should have a clear hose running outside the bottom of the chassis. I plugged the vacuum line because the new petcock does use one. The spring around the screw next to the small tube is to keep the screw in the position one left it. Page 1 of 2 1 2 Next > Nov 2 overflowing, then unscrew the flathead screw in the side of the bowl (sight screw) and adjust the needle valve until gas barely starts dripping out the hole. Jump to Latest Follow Tried riding it but it is hard to keep idiling since most gas is coming out. there is dirt in the needle and seat in your carb. the fuel pump. for the CV type carb by using the special adapter included in the kit. Fuel pump sounds good, when I have my aux. Put a piece of clear hose on the bottom of the bowl, on the drain thing, and open the drain screw. I turned the petcock off, it stopped. The hydrocarbon components of gasoline make it poisonous. Shut it down and smelled gas. Sometimes the float needle gets a thin, brittle film on it and it will stick which would cause the bowl to overflow and drain from your carburetor. SU carb leaning out and the starving - posted in Engine: I have a 179 with a 3. However after running my bike for a bit around the neighborhood my bike started to lose power. But you still need to disconnect the pipes from the float covers to remove the carburetors because of the impossible access to the "P" clip with heat shield in place. Hello all, I'm zuckie from Anaheim,CA. Tweaked on the float several times and no improvement. Should I not plug the vacuum line. Needle/seat could be stuck, something stuck in it, float could've sunk, air bleeds all clogged with dirt, inside of carb gummed up by varnished gas, etc. I think the needle and seat are fine. so its actually much easier than a screw driver and hose clamps and ripped fuel lines. It is a 40mm Mikuni and it's coming out the overflow line right next to the choke cable. Page 1 of 2 1 2 Next > Nov 2 overflowing, then unscrew the flathead screw in the side of the bowl (sight screw) and adjust the needle valve until gas barely starts dripping out the hole. It's a good idea to put an inline filter in the line between the tank & pump. If flooding occurs only after/during a hot soak, the fuel could be expanding due to excess heat. Jump to Latest Follow 1 - 7 of 7 Posts. rise up out of a carb unless it's got somewhere to go, like water. I figured out what was wrong and we put transmission oil back in and drained the motor oil out changed the filter and replaced the engine oil again. Turn off the gas and drain the offending carb(s). When gasoline leaks out of the vent it is because the float inside the carburetor is not stopping the flow of gas into the carburetor when the bowl is full. The next step is to pull the bolts out, one at a time, clean the holes out real well, and instill new ARP bolts with thread locking compound to make sure this never happens again. Try putting the carb back together, re-install it on the engine and turn on the fuel shut-off valve but don't start the engine. To avoid spills, tip the gas can in a vertical orientation and insert the spout into the mower tank opening. This particular one does not have a quick disconnect feature but given the cap screws on and off quickly, it may not be necessary. What can be causing this is the flaot level arm was bent slightly letting more gas in there by pushing on the needle valve to let gas in the carb float bowl then going over the top in to the carb. Another common cause of gas leaking around air filters is due to carburetor issues. - 10/2013 Month later I take home and it not only leaks after shutdown but now the governor can't steady the carb and surges back and forth after it warms up. Try a different CDI. When gas enters the carb, it raises the float which in turn pushes up on the needle. there is dirt in the needle and seat in your carb. Purge Bulb: Forces air out of system when depressed, and draws fuel in from tank when released. In addition, fuel may flow into the engine unrestricted, which, if the engine is not running, can cause hydraulic lock – that is, as the piston rises on the compression stroke it cannot compress the fuel. If the leak is coming from the bottom of the carburetor, try replacing the carbure tor bowl gasket. the 510s had this. All of the floats are set the same way. I recently replaced my petcock. Is there any easy way to free the float or maybe thats not the problem. Discussion Starter • #1 • Jan 27, 2007. On my generators I turn the fuel off and run the carb out of fuel for several reasons the first being a tiny pice of crud in the seat for the float valve would be impossible to detect in most cases even my Onan will leak like this some times so it’s a good idea to turn off the fuel, reason #2 when fuel is left in the carb the methanol eats up some of the seals and absorbs moisture, while. Try putting the carb back together, re-install it on the engine and turn on the fuel shut-off valve but don't start the engine. Also, don't smoke around a bike that's dripping gas. My carb leaks fuel out of the overflow hose at the bottom of my carb. "turn on the gas" for a few seconds, it should run clean gas out the hole in the bottom of the carb at a pretty good rate. Download a repair manual instantly and get the full details on troubleshooting, condition and how to remedy the machine. The carburetor was flooding out. With the carburetor itself, push the carb cleaner through where the inlet needle is and where the fuel flow comes in to flush out any dirt or derbis. Solution: Clean the carburetor – pay close attention to the idle jet and the electronic choke. now bend the tube and hold it up right so no fuel leaks out, the hose should be vertical now, but still connected to the drain. Car is not hot, just barely above the cold mark on the temp gauge. The second one I got had an old antifreeze can with a couple holes punched in the top. Page 1 of 2 1 2 Next > Nov 2 overflowing, then unscrew the flathead screw in the side of the bowl (sight screw) and adjust the needle valve until gas barely starts dripping out the hole. Now, to check the fuel tap, which starts and stops flow of gas from the tank to the engine: a) pull the fuel hose off the fuel tap while the scooter is off and see if no gas runs out of the hole in the tap. You need to bleed the air out of the system. If you are having problems with fuel constantly poring out of the carb overflow it is likely that you have another problem, we recommend checking the float valve is clean by taking it out and giving it a good blast with compressed air or carb cleaner. Re-install the rod/piston assembly without the spring and put the carb back together. My family has been plagued with fire. My carb is leaking gas out the air filter and it also runs though motor and runs out exhaust pipe. First, in my 30 plus years of working on small engines, for new problems all of a sudden , 90% of carb overflow problems are related to dirt getting into the needle valve. turned out to be gas pouring out of the over flow on the carb i shut the line off and trailered it home. I put the same carb and spacer on this 327 and I have the problem again. If all of this checks out, then you will probably need to rebuild the carb. On one side of the carburetor, near the bottom, there is a tube that hangs and connects to nothing. Tightened them up real good, and silence followed. I replaced the carburetor thinking this was the problem. The first victim of this fire was a young boy that very few in our family every met. Won't restart. Killed it, turned the gas off, and took a look. On the Virago I had, on the bottom of the bowl it had a screw that I could turn and a piece that I could hook a hose & drain the gas out of the carb to store it for the winter. I have 2 2000 883 Sportsters. New Subject on Pumpless : Last two times out after stopping for a while , I restart with no problem but , after taking off I get a major Sputtering and it dies like it just ran out of gas. I let it sit for 10 min with petcock on. What could cause the antifreeze to keep pouring out of the hose. Gas was coming out of the vent tube, the tubes that go to and from the two solenoids mounted on the carbs, and of course, enough fuel dumped out of the ports on the carbs to fill the combustion chamber. Research the PMO-fixture to drill bowl vents in the carb body. Dam thing's just sitting right now. Swapped a carb from a good running scooter and have same results. Dellorto PHBG 19mm. Now that coffee cans, and even larger glass bottles, are becoming hard to find, my workshop's pile of containers is mostly plastic. Dont try to run the fuel out, you only get about 1/2 of it. When full, tighten screw and continue filling radiator. I turned the petcock off, it stopped. If the float sloshes, replace it with a new one. Gas pouring out of carb overflow. You just as well take the carb off (and apart) and remove the jets, soak it in carb cleaner, and blow all the jets out with compressed air. Tweaked on the float several times and no improvement. Then I poured a cup of water in the filter, then poured in the gas and it kept all of the water in the funnel. Should I not plug the vacuum line. I suspected a stuck float in the carb, but first checked to see if fuel was pumping to the carb. I thought it may have the wrong needle and seat possably one for an atv without fuel pump so I ordered a new needle and seat but it's still doing the same thing. My bet is it needs a carb clean because it's gummed up from sitting. Once it is out, thoroughly inspect the entire tank; check for sediment, rust or any holes. plug and play into ytour carona bottle ( everyone has several of those around) then pour in freinds tank. Car is not hot, just barely above the cold mark on the temp gauge. If you are experiencing performance problems and suspect the carb, you will have to remove it from the engine to correct the problem. Put the float back in and put a clean hose on the fuel connection of the carb hold it up and blow into the fuel line and lift the float and see if it closes the air flow off. Perhaps someone can tell me if I have committed some cardinal carb sin that will doom my poor little car a few miles down the road: 1 - Hooked a "vent line" on the first carb's fuel bowl. As time went on it just got worse and worse until the carbs would actually overflow with fuel. I just picked up an 05 drz110 last night. Sure enough fuel was pouring out of the overflow tube. The liquid looks a bit slimy at the end (but it is water Base: 1. Gas out of the throat is pretty normal. Car is not hot, just barely above the cold mark on the temp gauge. Good compression, valves adjusted, good spark, drained and added fresh gas. Instead of you dumping the gas in, you position the can above the fuel tank, insert the nozzle into the hole and hit the trigger. You should hear air. I installed it on the tractor and had the same problem with gas spewing out the top. Good luck!. So that seemed to help. You might have worn float needles depending on the age/mileage of the bike. Fuel leaking through the overflow tube on the right side carb. > once had a drop of gas in it. I recently replaced my petcock. The reason I bought it was because the original one was leaking gas out the overflow. - If fuel is not overflowing, then unscrew the flathead screw in the side of the bowl (sight screw) and adjust the needle valve until gas barely starts dripping out the hole. Then the carb started pouring gas out of the float overflow until I shut the gas off. In addition, fuel may flow into the engine unrestricted, which, if the engine is not running, can cause hydraulic lock – that is, as the piston rises on the compression stroke it cannot compress the fuel. Excessive engine oil can put quite a bit of oil out the breather pipe and also may produce white exhaust smoke. If you worked on the carb and it starts overflowing, then it's bad float adjustment/alignment (you oops), or something wasn't put back together correctly. What could cause the antifreeze to keep pouring out of the hose. Killed it, turned the gas off, and took a look. so no pressure from tank side. Spraying carb cleaner thru the jets doesn't always get the buildup out. Even if the petcock was off, if it seeps a tiny bit, it could do this. Another thing is the angle of the machine. In cases like this, the carburetor will need to be cleaned, the oil changed and the air filter as well. gas pouring out of overflow lines fast and steady? - posted in Vintage Ski Doo's: Rebuilt a Mikuni 34 and thought I did a great job as the sled starts and runs great. Any ideas????. After docking on my return trip I saw gas POURING out of the bottom of the exhaust housing on the outside of the motor. Now that coffee cans, and even larger glass bottles, are becoming hard to find, my workshop's pile of containers is mostly plastic. On the Virago I had, on the bottom of the bowl it had a screw that I could turn and a piece that I could hook a hose & drain the gas out of the carb to store it for the winter. i carry a fuelie stub fitting on a 6 inch hose in my tool roll…to plug into the gas tank of modern harleys. MKL's '98 1200C. Of course sometimes I will remove the dust cap and lift on the rod so that I can tell if the carb is getting gas. I also like to work on a wooden surface because it absorbs the spilled gas and cleaners rather than pooling. If your crankcase breather is passing oil, chances are that something's wrong (Okay, we know something's wrong, but don't be too alarmed). Re: Gas coming out carb. Fuel Float Issue: Designed to maintain pressure inside the carburetor by closing off the system at a certain fuel level, the fuel float can become stuck, resulting in gas escaping from the carburetor into the vent tube & air filter. When gasoline leaks out of the vent it is because the float inside the carburetor is not stopping the flow of gas into the carburetor when the bowl is full. 30 gab and cleaned them. I just took it out of its winter home, and started it up. 8 quart of SAE 30 motor oil. 5 moles of citric acid for every mole of bicarbonate:. Pull the carb and clean the needle and seat. Cleaning is all I am covering here, this will be addressed in the future. When the fuel level is correct, the needle will press up on the seat and stop any more fuel from entering the float bowl. Ran the machine dry, turned it back to run, and. everything looks fine. If I let the float hang down, gas comes out to the bowl. Last Online: 05-25-2015 09:09 PM. Debris or Blockage. I've got the same problem with a freshly built 327 I just put in my 66. Usually you can tap the float bowl with a screwdriver and unstick it, but if it happens again, overhaul the carbs. Does fuel start pouring out when trying to start?. I nursed bike home removed bowl on carb noticed some sediment. However, yesterday when I started the Rhino, it missed/sputtered and I noticed gas pouring out of the overflow hose. B - As stated above, this is the drain for each carb bowl. Since it was new, it leaks gas out of the carb overflow tube. Crud can get stuck in there and cause the float needle to NOT seat properly causing gas to constantly flow into the float bowl. I've since checked this by sticking a bit of kitchen towel through the choke inlet into the venturi to confirm that it gets wet so the carb appears. If so you should be good. Carefully remove the gas tank, but leave all valves and caps in position. Re-install the rod/piston assembly without the spring and put the carb back together. You have some trash in the needle and seat valve in the carb. Easier to run the bike empty of fuel by shutting the gas off and letting it idle until it dies. '72 MGB - Fuel pouring out of vent line from front carb when the fuel pump is pumping. I have a 2000 formula deluxe, today i noticed that when it was idling there was gas pouring out of the overflow on the mag side carb. Joined Jan 8, 2007 · 47 Posts. If there is too much fuel, the carb may overflow or it may flood the needle jet causing a rich condition. You could get away with running a 650 CFM Holley. Good point niper99. So I thought OK I'll shut the fuel valve off. The overflow problem is a carb float being stuck open. I was worried, but problem solved: Mechanic says one of the engine carbs was missing a screw and the engine was running on five cylinders. A badly adjusted carburetor can send too much gas into the carburetor; and the overflow will eventually wash down the cylinder walls and into your oil pan. Another common cause is the use of fuel containing any Ethanol. there is dirt in the needle and seat in your carb. Does it when scooter is sitting ( no running ). As soon as I turn the gas to on or reserve it just starts pouring out of the drain tube. If you change the spark plug and it doesn't rectify the problem, it's likely your solenoid. Hold the float gently up to simulate a full float bowl and connect the gas line to the carb. So double the amount. If you look at the diagram of carb you will see the open end of the needle retainer clip facing the choke side of the carb. Finally i drained the crud. The valve needs to be cleaned. 7sta-bil which i will never use again had my carb so clogged up that my jets werent spraying they were dribbling drops of gas and causing it to run very richwhich causes it to be very cold natured and takes a little more time to get to operating temp, not to mention all the black smoke coming out of the. Inspect the top of the pin for damage. I took off the fuel cap and cleaned the shit out of it with some carb cleaner. This also tends to foul the spark plugs. If it's coming from the carb/air filter, you have a stuck float, its running out of the overflows so that it doesn't go into the piston. Spraying carb cleaner thru the jets doesn't always get the buildup out. Gas Overflow ('09-'13) Jump to Latest Follow Heard bubbling/gurgling, looked over, it clicked, and then a rush of gas just starts pouring back out. Hello all, I'm zuckie from Anaheim,CA. Both look like they may have gone in next to the needle and seat but I didn't want to try to pry the old one out and don't have a tool to install the new ones. But you still need to disconnect the pipes from the float covers to remove the carburetors because of the impossible access to the "P" clip with heat shield in place. This is what happens: 1. These days kits have become much more universal, carrying parts for several models in one box. Disconncet the fuel line from the carburetor to make sure fuel is getting to it. When the needle is worn, fuel continues to flow and it will either start pouring out the carburetor overflow and onto the ground, or it may fill the engine and airbox with fuel. I recently had the tank painted due to a fender bender when I pulled the old screen there were paint chips on the screen. Jump to Latest Follow Tried riding it but it is hard to keep idiling since most gas is coming out. Well the gas kept pouring out of the carb with the valve in the off. I have experienced this problem before and resolved it by thumping on the carb bowl with a rubber handel. I have an HP4150 750 carb, and under certain circumstances, after running for a bit, then from on the throttle to then idling, fuel will sometimes spew out of my primary breather tube, stalling the engine. A badly adjusted carburetor can send too much gas into the carburetor; and the overflow will eventually wash down the cylinder walls and into your oil pan. I tapped the carb with the handle of a screwdriver thinking maybe the float was stuck but the gas was still leaking. The pump did not auto-shut off!. I have a 2010 KTM 250sx that was running well before the rebuild. It is a 1998 15hp 4-stroke Mercury; Model 1-F153124D, S# OG735686. Bleeder screw is beside the 90 degree carb neck. Once it is out, thoroughly inspect the entire tank; check for sediment, rust or any holes.