Question about Yamaha FZ 750 AE (U.S Motorcycles

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Gas pumping out out overflow betweeen #1 -2 carbs when running or when key is turned on

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Remove the float bowls on the left carbs then clean the carbs with spray carb cleaner. Pay special attention to the float needle. A bit of rust, gasket or other contaminant is preventing the float needle from shutting off the petrol. Please rate my answer.

Posted on May 25, 2011

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Posted on Jan 02, 2017

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Why is bike flooding and pushing gas out top over flow hose on carb after it runs for a min or two. Carb float been replaced still doing it.


Hi, Paige and the usual suspects are:
1. Damaged or restricted fuel tank venting system.
2. Loose float bowl screws.
3. Damaged float bowl o-ring.
4. improper fuel level in the float bowl.
5. Worn or dirty inlet valve or seat.
6. Damaged or leaking float assembly.
7. Particle contamination in inlet fitting cavity.
For more information about your issue please visit the websites below. Good luck and have nice a day.
My carb leaks fuel out of the overflow hose at the bottom of my carb
Carburetor is leaking gas out of overflow tube need help
Carburetor Carb Leaking Gas How to Fix Repair it Motorcycle Honda DIY..
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Carbs leaking Here is how to fix it

Mar 28, 2016 | GAS Motorcycles

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Leaky carb


Float stuck..

Mar 22, 2014 | 2011 Yamaha TTR125

1 Answer

My 1994 BMW 740i will not run but motor is cranking turning over and trying to start to run like lack of fule.


Try spraying carb. cleaner in throttle body while turning the key. If this works, most likely have a bad fuel pump. Good Luck

May 02, 2017 | Cars & Trucks

1 Answer

Won't start - runs w gas added 2 the carb.


Check and make sure there is power going to fuel pump.Turn key on as you test wire (at pump)

Jun 13, 2011 | 1993 Chevrolet K1500

1 Answer

I have a 1984-85 holley 4 barrel and it has


Electric fuel pump most likely has too much pressure for the carb. AFAIK, the Holley 4150/60 & 4165/75 should each demand the usual 4.7-5.3 PSI (4.7 @ idle, 5.3 @ max RPMs), so even the Holley red pump would need some restriction from a regulator. If you want this to be adjusted to its best efficiency, you need to have a fuel pressure gauge installed temporarily, if not on the regulator like I have on my Scout II. FWIW, the regulator I have installed is the Mallory 4307M from CenturyPerformance.com, Summitracing.com, Jegs.com, etc.

http://www.malloryperformance.com/pdf/4307M.pdf

A bad Needle & Seat will do this also, or debris stuck between the Needle and the Seat. This is where light tapping on the bowl helps, but it's best to run the fuel out of the bowl a few times and then the volume flow, or quick filling of the bowl, should loosen up the debris.

You also could have set he fuel float too high. What model carb, the ones I mentioned above (AKA Holley Modular Carbs)? If so, then Holley's site has a tech center & instructions on setting the float(s). www.holley.com

Set the floats carefully and slowly/gradually. Make sure the lock screw is always loose enough before turning the adjustment nut. If you strip out the bowl's threads on an older carb, you'll beat hell finding a replacement. 1/12 turn = 1/32" of fuel height IIRC. You set the fuel level, with pump running (wrap a rag around the carb so gas doesn't leak onto the manifold!!!) so the fuel is just starting to dip out of the "peep-hole" in the side of the float. Removal of the peep/seep-hole screw/plug is necessary first. Clockwise rotation of the nut lowers fuel level IIRC and counter raises fuel level. Again, please check their website. Most people get discouraged when dealing with the Holley Modular Carbs, but they are the simplest and the best carbs on the market. Even if 30+ years old.

Apr 15, 2010 | 2000 Ford Expedition

1 Answer

Carb leakes gas out overflow


It doesn't take much to hang the float valve open. The smallest speck of dirt or debris will cause the float valve to not shut the flow of gasoline off. After sitting for that length of time, the carburetor needs to be completely disassembled and cleaned. Use an automotive carburetor cleaner (but do not put any plastic or rubber parts in the carb cleaning solution as they will be eaten up). While you've got the carb apart, inspect the float valve. Replace it if there's a groove worn into the tapered seat. Installing an in-line fuel filter may help, too.

Nov 16, 2009 | Yamaha WR 450 F Motorcycles

1 Answer

93 gmc sierra 5.7 liter engine, injection carb, will turn over won't start, replaced fuel pump fuse, replaced fuel pump relay, replaced fuel pump inside gas tank, no gas flow to carb , gas gauge has always...


you say you replaced the fuse, but does the fuse have power? the gray wire at pump should have power when cranking, or for 2 seconds when turning key on. At fuel pump relay, put power onto gray wire, the pump should run if the wiring is good. if it doenst run then ck for power at fuse while power is on gray wire.

Oct 19, 2009 | 1995 GMC Sierra C1500

2 Answers

Carburetor overflowing


Gas line from primer bulb to carb may be cracked or broken. Check gas lines for damage. If not that then there maybe an overflow problem in side the carb caused by the float shut off not seating correct or worn "o" ring etc.

May 16, 2009 | Poulan Pro 42CC 2 Cycle Chainsaw, 18"

1 Answer

1984 corvette fuel solenoid


unfortunatly you are going to have to run new power and a new pump. a fuel injection pump runs 30 psi minimum some of them quite a lot higher than that. a carb cannot have more than 7psi without bypassing the float in it and overflowing the carb with fuel. when going to a carb you will have to get a low pressure fuel pump and completely rerun the fuel system

Apr 28, 2009 | 2003 Chevrolet Silverado Ss

1 Answer

Gas leaking from hose that is under tank that is not for gas flow


is it an overflow from the carb? gas will only be in one of 2 tubes and they are the fuel line from the tank and the carb over flow. unless you have an electronic fuel pump then tubes go from tank to pump to carb. if its coming from the overflow then you are getting too much fuel into the carb float chamber. you may have a sticky float. thy getting some Berrymans B12 fuel additive and putting double the doseage in the tank. run engine til hot then leave it to stand overnight. this should break down any gum/varnish that has built up in the system

has this been in storage thru winter?

Apr 02, 2009 | 2001 Honda XR 250 R

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