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L105 model starts but will not stay running, getting gas.

Cleaned bowl, float and needle. RUns for 2-3 seconds and shuts down.

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Posted on Jan 02, 2017

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SOURCE: Briggs Flo Jet carb floods and puts gas into the crankcase

This is a common problem. The needle and seat are prone to being held open from debris, old fuel (these days it only takes a month for fuel to start to go bad) and poor mower design. The weight of the fuel from the tank can be enough to overpower the float system with just the slightest "gumming" of the needle seat. Also, if it's equipped with an electrically powered valve on the bottom of the float bowl, this unit can outright fail, get gummed up a bit, or the electrical system have a problem and power is getting to this unit while switched off, leaving it open thus passing fuel. Most likely, replacing the needle and seat, giving the carb a good cleaning will solve your problem, however if there is damage to the seat from age or debris, just install a 2 dollar in line shut off valve available at most retailers. Then just turn the fuel on and off manually. Cheap fix. 2. Drain the oil from the engine, refill with new oil and just a oz. of atf (automatic trans fluid). Crank the engine with plug wire disconnected for 30 sec or so, then connect the plug wire. Start the engine, but only let it run near idle for a minute or so. Drain again, letting the crankcase "air out" with all plugs\dipstick removed. Remaining fuel will evaporate. Refill and your off and cutting......The ATF is a detergent of a type and will help to collect the fuel from the surfaces inside the engine. It's important to note the fuel will have washed any lubrication properties from the oil, and damage to the journals and other surfaces can happen if the engine is run too long. Usually following the above procedure will limit damage and the engine should be good for many more seasons. Good luck! Papa

Posted on Nov 15, 2008

  • 119 Answers

SOURCE: my john deere 345 shuts down while running.

check the tank for debris blocking fuel outlet. also change fuel cap as it could be pulling a vacuum on the tank.

Posted on May 05, 2009

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SOURCE: model no. 31as6fef729 544332

This is a good time to remind everyone that you should not leave fuel in equipment that is not used on a very regular basis. More than likely your carburetor is gummed up from the old fuel. This can happen in less than 30 days much less 2 years.
To properly clean a carburetor you need to remove the carburetor and purchase the correct kit for the rebuild. Disassemble the
carburetor carefully making notes where each part goes. Once you have the carburetor disassembled clean it by soaking it in carburetor cleaner for a few hours. Use anned aerosol automotive carb spray cleaner to fill a small glass jar with enough cleaner to submerge the carburetor. Use a jar with a metal lid so you can gently agitate the solution occasionally to make the process more effective. You need to allow the carburetor to soak as long as it needs to remove all visible deposits. After the carburetor is cleaned allow it to dry and reassemble.

Posted on Sep 20, 2009

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SOURCE: Carburetor problem on Craftsman 14.5 HP B&S

The switch you are talking about is an anti-after-run solenoid. It shuts off the fuel flow when you turn off the key switch.
To check its operation is easy, turn the key on and off a couple of times and listen for a click, if you don't hear it, hold the switch between your thumb and forefinger to see if you can "feel" it click on and off.If you neither hear or feel the switch working, you will need to use a test light or meter to check to make sure it is getting voltage to it to make it operate.
If you just recently filled up the tank, it is possible that you have gotten some contamination (dirt or moisture) that has gotten to the carburetor. You will need to remove the float bowl to check this. You will need a very thin 1/2" wrench to remove the solenoid (electrical device) from the bottom of the carburetor to get the bowl off after you unplug the wires from it. Use some sort of small tray or cut off the bottom of an oil container or whatever to catch what is in the bowl to inspect it for contamination.
If you have a plastic in-line fuel filter look at it at its lowest point to see if there is any water in it. Water will look like a seperate bubble within the gas and floating at the bottom of the gas. Before removing the float bowl you might want to rig up something to plug or pinch the fuel line to stop the gas from flowing out of the tank while you are working on it

Posted on Oct 25, 2009

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SOURCE: Tractor starts then shuts off, smell flooded

ck the seat saftey swicth thay go bad

Posted on Feb 21, 2010

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Drain the fuel or when you remove the float bowl bolt (also the main jet), then hold up on the float to keep the needle on the seat so gas won't go everywhere. When you have that brass bowl bolt off, clean it! Use nothing metal on it. Pay close attention to the small hole in the bottom and along the smooth unthreaded part at the other end. Use carb/choke cleaner to blast gum and dirt out of those very small fuel orifices. I recommend installing an inline fuel filter also. A shut off valve is recommended too, that way if the needle in the carb sticks open, the crankcase won't be polluted with gas. Usual symptoms on a clogged lawn mower main jet though, are after pushing primer bulb, engine runs about 3 seconds. Try the brass bolt cleaning and post back if needed.

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You have to take the bowl nut off he bottom of the bowl and clean it with a small wire or torch cleaners. Try not to allow the bowl to drop off the carb, the float drops down and the needle might come off the float.

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It is not a difficult fix but it does mandate removal of the carburetor float bowl.

You could probably do this yourself. It is much easier if you place the generator on a high work area so you can see the float and needle once you have the float bowl removed. Just make sure you do not drop the float assy so far that the needle comes out of the seat unless you have to remove the hinge pin SCREW for the float to clear the debris near the needles' pointed rubber head.

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