Question about Craftsman 20 hp 42 in. Deck Lawn Tractor - CA Model

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Float sticks and gas floods motor

Gas runs into motor and oil chamber

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The needle is sticking on the caburetor float thus letting the fuel siphon from the tank into the cylinder block. Have the carburetor rebuilt and drail and flush the engine with automatic transmission fluid before putting in nem oil. Should cure your problem.

Posted on Oct 31, 2012

  • Randy Nov 01, 2012

    Thanks so much for your help... Tried it and it now cranks. Such a relief.

  • vichall67 Nov 01, 2012

    Glad it worked, you should put in a in-line fuel shutoff between the fuel tank and the carburetor. Shut it off after each use and it will save you some frustations later on.


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Will a carb rebuild fix this?

the float needle and seat is the first obvious fault
next if a holley, is the power valve has a hole in the diaphragm
next is wrong pressure from the pump ( add a fuel pressure regulator)
best have the caby overhauled by an accredited carby specialist shop because it is very easy to miss the exact reason for the flooding and be back in the situation where you are now

Apr 08, 2016 | Cars & Trucks

1 Answer

Have a murrry mower with 12 hp moter put a cut off on gas line some times runs ok then will start flooding if you cut gas line off start engin it will run a second or two then start blowing oil out an

If you have a float style carb I believe the float has become a "sinker". Pull the float bowl off the carb and set aside. pull the float pin and also set aside. carefully remove float and needle, set needle aside. Shake the float near your ear. If you hear sloshing in the float, replace it. No? check needle and seat for wear, or since you're into the carb this far replace them. This info is based on Tecumseh carbs, but B&S or Kohler should be similar. If there are any other questions don't be afraid to ask. There is no such thing as a stupid question.

Jan 29, 2013 | Briggs & Stratton Garden

1 Answer

Didnt use my moped in a while. put new battery and filled up my gas as I tryed to start, I noticed my gas leaking ouy thru cirle piece next to where I load my motor oil. Seemed like gas wasnt going all the...

I'm gonna guess that this is a 2 stroke engine.

The reason I say this is that it's a common problem for engines that have oil added to the fuel. If you let the bike stand for an extended perion, the gas in the carburretor slowly exaporates, but the oil in it doesn't and the residue becomes a sticky and treacle like. As the gas evaporates, the float in the float camber of the carb drops and opens the inlet needle valve, any remaining gas/oil mix seeps in, more gas evaporates and more sticky goo forms over time. That residue will have probably caused the needle valve in the carb to stick open and not be pushed closed by the float in the float chamber when new gas is put in the bike. When this happens, the carburretor floods and gas runs out of a small rubber overflow pipe on the carb.

You need to remove the carb, strip it down and wash it in fresh. clean fuel, making sure any residue is removed and the unsides are clear before you reassemble and refit.

Jul 08, 2011 | Vento Agility RS Motorcycles

1 Answer

Bike sat for 2 was full of fuel when it was parked

Sometimes when a bike sits, the floats get corroded and stick and sometimes they stick open allowing fuel to overfill the carburetor, if the intake is open when parked, the fuel will run right into the combustion chamber, pass by the piston rings and into the cranckcase.
I saw this happen serveral times.

Check your oil level and its probably overfilled, but its a gas and oil mixture so do not just drain out enough oil to the correct level, drain all the oil and change the oil filter.

Now you'll also have to pull the carburetor and have in thouroughly cleaned, jets removed and soaked, rinsed and blown through with compressed air.

After your carbs are cleaned and a new oil change your bike will be good to go.

Some people prefer to use seafoam added to their gasoline, to help prevent the floats from sticking and the jets clogging.
If possible it is also helpful to start the bike at least weekly and let it warm up to temp.
especially if you plan not to ride it for a while. If you fear that the gas will run into the motor again from sitting, be sure to turn the fuel petcock to off.

Dec 03, 2010 | Honda VT 1100 C2 Shadow Sabre Motorcycles

1 Answer

Gas in my oil 650xsc need advise

If a float needle sticks and you are in prime position you can fill your crankcase with gas . You may need to clean the carburetors and replace the float needles. Always turn off your gas when not running the engine. If your gas was off you may need to replace the four hole sealing washers under the the on/off lever they may be seeping gas when they are not supposed to. If your engine flooded in the run position on newer models, you have a bad diaphragm on the vacuum petcock. You can try rebuilding the petcock with an aftermarket kit from K&L or if available replace the petcock with a new one. Newer petcocks off the Virago's should fit. At any rate you will also need to change your oil so you do not damage your engine by running it with diluted motor oil. Also Check your air filter to make sure the crankcase breather did not soak the air filter with diluted motor oil.

Nov 28, 2010 | 1976 Yamaha XS 650 C

1 Answer

Fuel floods combustion chamber locks motor. could this be caused by stuck float in carburator?

You will most likely have to put a fuel cut off,inline to prevent this,oh,and change the oil,most of them already have them .If this is helpful,please rate,thank you.

Jun 27, 2010 | Air Tools & Compressors

2 Answers

Shooting gas out of the muffler

your float valve control "in the sediment bowl" is stuck open and not shutting off the gas supply when full

Apr 10, 2010 | Mtd Arnold Oem - 190 - 607 Fastattach...

1 Answer

I purchased a 1995 GPZ 1100 Kawasaki motorbike. It has 10,000 miles. It been sitting for the pass 14yrs. It was started occasionally for time to time. I?ve had the tank, and carburetors professionally...

Hope you drained the oil and also changed the oil filter.
This problem of cutting off is a carburator/fuel related issue.
I guess the fuel might not be pouring in to the float chambers faster enough.
Try this, remove the air -filter and thn start the engine and as it is about to cut off, block the intake(by your palm) at the carburators and see what happens...taking care not to over block it as the gas may pour out and also flood in the combustion chamber rendering it to shut off due to to much fuel.
If it does respond and stay running thn the problems is tht the carbs are not getting the gas as required and probabley you may have to recheck the float level, the float pin,carb synchro, air-fuel mixture.
Check the pet- c o c k too.
Hope this helps!

Nov 27, 2009 | 1995 kawasaki GPZ 1100

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

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