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The fuel is going straight through the carburettor and out of the exhaust pipe

Does not run flooded what could be the problem

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Sounds like your float inside the carb bowl is tuck int the open " fuel flow position " you need to shut off or empty your fuel tank..and remove the bowl and do a good cleaning of the bowl and float area..it is a simple set up just pay attention on how to remove the float and valve seat..once you get the float out shake it and listen for gas inside it there should be none..but sometimes it develops small holes and will let gas in and will not shut the gas flow when stopped..If it does then tne float needs replaced..if none the your carb will need rebuilt..or replaced. Rebuild kits are available and inexpensive...Oh if this is a nearer engine I suggest checking your oil for gas..if it has gas in it..do another fixit post for a fix..good luck..

Posted on Apr 09, 2015

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Fuel filling up the cyclinder, runing out the exhaust. Removed spark plugs and petrol came out. What is causeing this to happen?


It certainly sounds like the needle valve is stuck.
If it is a gravity feed fuel system and a normal carburettor it sounds a particularly bad design not being equipped with a petrol tap to isolate the supply when the machine isn't in use. Gravity fed designs without a fuel tap would typically place the fuel level below the engine inlet ports to prevent that potentially dangerous and/or expensive type of flooding. The surplus fuel would then run from the carburettor float chamber vent which if it presented any immediate danger would be piped away.

As part of the investigation and repair it would be a good idea to change the engine oil.

Feb 28, 2015 | Garden

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How to fix emission problems ?


Get some Carburettor cleaner spray from an auto center.
Take the pipe off into the air filter unit attached to the Carburettor it normally has a large ring clip around the black pipe so you may be able to use a slot screwdriver or a small ratched driver to remove.
Put a small piece of cloth into the carburettor unit to stop too much contamination going back into the system . Use a cloth or paper towel to wipe off any excess oil inside the carburettor. Spray the carburettor cleaner inside the unit , Using an old Tootchbrush give it a rub to degrease the old oil and fuel. Be careful to Open up the open and closing circular small valve spray a little bit of cleanir inside and using a long piece of cloth clean any contaminated area inside the carburettor.
Dont ruch this and get as much old oil and grease from inside the carburettor as you can. Taking care to remove all the bits of cloth and paper tissue . .
Start the car up with the Carburettor still open to the world.
With the car running and the Carburettor opening and closing spray a little more of the cleaner using the straw in the nozzle into the inside , please make sure you are standing to the side so nothing comes back out into your eyes.

With the carburettor now much cleaner . Put the air pipes back on and take it for a run . At your next fill up of fuel put in a fuel addative for Engine System cleaning and this should help with the emissions.

Jul 20, 2014 | 1998 Volvo V70

1 Answer

Car is fine at norma speeds. Car does not accelerate when you step ******* the gas.


Get some Carburettor cleaner spray from an auto center.
Take the pipe off into the air filter unit attached to the Carburettor it normally has a large ring clip around the black pipe so you may be able to use a slot screwdriver or a small ratched driver to remove.
Put a small piece of cloth into the carburettor unit to stop too much contamination going back into the system . Use a cloth or paper towel to wipe off any excess oil inside the carburettor. Spray the carburettor cleaner inside the unit , Using an old Tootchbrush give it a rub to degrease the old oil and fuel. Be careful to Open up the open and closing circular small valve spray a little bit of cleanir inside and using a long piece of cloth clean any contaminated area inside the carburettor.
Dont ruch this and get as much old oil and grease from inside the carburettor as you can. Taking care to remove all the bits of cloth and paper tissue . .
Start the car up with the Carburettor still open to the world.
With the car running and the Carburettor opening and closing spray a little more of the cleaner using the straw in the nozzle into the inside , please make sure you are standing to the side so nothing comes back out into your eyes.

With the carburettor now much cleaner . Put the air pipes back on and take it for a run . At your next fill up of fuel put in a fuel addative for Engine System cleaning and this should help with the emissions.

Apr 09, 2014 | 2000 Volvo C70

1 Answer

Liberty 50 2t fuel leak when starting. a heavy fuel leak down over the flywheel and onto exhaust when standing or more extreme when starting.


Fuel float in carburettor maybe set to high! causing Needle and seat not to close! hence letting fuel flow from Over flow pipe in carburettor.

Turn fuel on then off to start engine once engine running turn fuel on again.

But best to adjust fuel float height, its just a tiny bend you have to make on a brass tab to stop fuel flow when the float gets to a certain height! in the fuel bowl of the carburetor.

Cheers

Cheers

Nov 29, 2013 | 2011 Piaggio Liberty 125

2 Answers

When turn on petrol and kick bike, petrol is running out of overflow pipe on carb and bike wont start, and bike sounds flooded.


You have a sticking float in the carburator, due to old gas, or dirt. The float moves a needle that turns on and off the flow of fuel into the carb bowl.

Mar 23, 2011 | 2003 Suzuki RM 125

1 Answer

1990 regal starts, runs for 2 to 3 min then dies, changed fuel filter, crank sensor, coil packs, it has 45 pounds of prs. to rail. im stumped


hi, please check you oil level, ( on level ground). when the car is running place an old rag in front of you and take off the oil filler cap (be careful not to get near the fan, fan belt) if no oil comes out of the filler hole possible fault: oil pick-up pipe (in sump partial block), / oil filter in sump ( blocked), oil pump worn, oil relief valve (returning oil back into the sump), spring weak / broken. the (E C U) ENGINE CONTROL UNIT has many sensors that can stop the engine: but try cleaning the (EGR) ENGINE GAS RECIRCLING VALVE, this valve recycles gas back in to the engine, ( must be CLEANED with BRAKE FLUID) this is a VERY DIRTY job, as this gets block with carbon (EXHAUST PARTICULES). the E C U will detect all of these sensors: the (ECT), TOP OF ENGINE engine coolant temperature sensor rough tick over, (HO2), EXHAUST DOWN PIPE, heated oxygen sensor checks mixture of fuel, can adjust air / fuel, it tries to keep car going / may flood engine. (M A F) mass air flow, adjusts fuel / air retio this sensor can so much fuel to the engine it may flood it. flooded engine mean WET spark plugs. i would put it on dianostic machine to check these out before paying for extra sensors. gerry

Sep 08, 2010 | Buick Regal Cars & Trucks

4 Answers

Backfire


is it a straight thru exhaust, or is it just a head pipe with nothing attached? If it's just a head pipe, you need to get some sort of muffler on it or you'll burn your valves out from a lean condition. The backfire is due to the vaccum fed carbs that yamaha runs. They work wonderfully, but under heavy deceleration, the vaccum still feeds the bowl, and it builds up excess fuel, which eventually burns off as a backfire. If it were fuel injected, you could have the fuel map adjusted to lean it out under deceleration.

Jun 22, 2010 | 2001 Yamaha V Star 1100 Classic

1 Answer

Runs as if it is flooding black smoke and missis


It sounds like a stuck or worn needle in the carburettor. It is like the ball valve in your toilet. If it is you will need to replace it and the seat. It is inside the carburettor and allows the right amount of fuel into the fuel bowl. Over time the it wears and the needle does not sit properly in the seat so it leaks. Some times it wont close properly if it becomes gunked up. If the needle sticks open the carburettor floods and nothing works properly. It is a simple enough fix to do yourself but a good mechanic should be able to sort it in about half an hour.

Mar 02, 2010 | 1989 Ford F 250

1 Answer

Hi i was riding my yamaha yz125 2001 and it cut out now it doesnt have bareley any compression what so ever ! IT WILL NOT START PLEASE HELP :( WHAT DO YOU THINK THIS IS ?


make sure the float did not stick open and flood the cylinder. turn off fuel supply and remove exhaust pipe from cylinder. Does expansion chamber have fuel in it? It shouldnt- drain it. Place a towel over rear of front fender and on floor under exhaust port and kick motor over. Does fuel spray out? If so motor is severely flooded. Keep kicking untiul all fuel is purged from motor. Motor will likely start and run for a second once the fuel is reduced to a level the motor can handle. Reinstal exhaust and fix carb/ float problem. Hope that solves the problem.

Nov 23, 2009 | Yamaha YZ 125 Motorcycles

1 Answer

Fuel line from carburettor - is this a return feed?


usually their will be a tube leading off the carb to let excess flow drain from the carb to aviod flooding.

Apr 04, 2009 | Pit SSR 110CC Pro Beginner Bike

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