Question about Craftsman 17.5 hp 42 in. Deck Lawn Tractor - CA Model

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Starts to skip and choke then stalls (when engine hot),

Plenty of fuel going to carb, let sit till cool and runs fine again.

Possible that the electric fuel shutoff is doing it ???, don't know how to bypass to check. Doesn't pop or backfire during shutdowns telling me the spark isn't cutting out.

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WANT TO BYPASS THE FUEL SHUTOFF? TAKE IT OUT,TAKE A PAIR OD CUTTERS AND CUT THE PLUNGER OFF. ALL THE PLUNGER DOES IS KILL THE FUEL TO THE MAIN JET. I DO THIS FOR MY CUSTOMERS ALL THE TIME! ITS A WHOLE LOT CHEAPER THAN A NEW ONE! THEY CAN BE COSTLY

Posted on Jul 29, 2009

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2 Answers

JD JS45 walk behind mover. Starts, runs fine for 5 minutes, then stalls, won't restart till i pull the spark plug and cool the motor, plug down. then same thing starts, runs for 5, stalls.


Probably either a fuel or a spark problem. You need to check for the presence of a good spark immediately the engine stops - by using a spark gap, a spare spark plug or a propriety spark indicator.

If the spark is found to be absent the fault is likely the ignition module but check all connections and the stop switch operation before replacing.

If the spark is present then the fault is probably fuel-related and is the sort of thing a tiny droplet of water in the carb could cause...

Jul 23, 2016 | Cars & Trucks

1 Answer

Engine runs well for 40-60min then shuts down.


sometimes when a spark plug or the coil is going bad it will run till it gets hot then die. after it cools off it will start and run fine. till it gets hot again. replace the spark plug if that don't fix it you may want to start looking for a coil.

May 19, 2016 | Garden

1 Answer

It stalls after running fine for 30-45 minutes


Hi James:
Thanks for providing an extremely detailed history.
My first reaction was similar to yours............ sounds like a fuel supply obstruction, but you seem to have covered it extremely well.
There are two other things you may consider checking.
1) When the stalling occurs, shut off the engine and pull the spark plug(s). Check the appearance of the electrode, wet indicates firing (spark) problem, dry indicates fuel delivery problem. While the engine is still hot, reconnect the plug lead, hold the plug against the head, then spin it over and check the spark. You're looking for hot and blue.
2) Exhaust obstruction. Remove the muffler and make sure that there is no carbon buildup or defective baffle that could be causing excessive back pressure.
If you reply as a comment to this post I'll get your feedback.
Cheerfuls
Ted

Nov 06, 2015 | Garden

1 Answer

Starts stalls


contaminated or water in the fuel is most likely the culprit here.
drain the tank and carb (small screw at bottom of carb float bowl)
Add fresh fuel from a CLEAN fuel source. Best to completely drain your fuel can and fill it up with fresh fuel. That way if the fuel can is the culprit you eliminated doing this twice.
What happened was fuel sits on top of water, this is why the bike would still idle. The idle circuit in the carb pulls fuel from a higher point than the main jet. This is also why when you hit the throttle it would just die, it was sucking most like something other than fuel.

Apr 02, 2014 | kawasaki KX 450 F Motorcycles

1 Answer

My 1988 2.3 liter mustang will not start after sitting overnight


Being that this vehicle is a 1988 it is most likely still using an electric choke. When your vehicle is cold (even just not warm enough) it needs a richer fuel/air mixture to start which is what the choke is there for. When you turn the key the choke will automatically shut so the suction from the engine will pull fuel from all circuits of the carb. Anyways.. long story short for some reason it would seem your choke isnt closing as it should. This is generally just a hot wire thats connected to your carb.... maybe a short maybe its stuck open for some reason.. idk but that is where you should focus your attention. Hope this helps.

Dec 27, 2013 | 1988 Ford Mustang

1 Answer

Have a 90 f-250 5.8 gas burner. sat in a warehouse for 2 years. new battery and gas. starts and idles great. run up rpms for 2 minutes and it starts choking out. let off fuel and goes back to idling...


Carburetta is fouled. Run fine on choke - rich mixture. As it warms up and choke pulls off, its starving for gas.
First try adding fuel system cleaner to the gas tank. Do NOT go overboard. No more than double the recommended mix ratio.
The alternative is to remove the carb, open the bowl and spray out the jets and venturi with carb cleaner.

Its possible you may help it by removing the air filter and spraying every orifice you find on top of the carb. With carb cleaner. Be very carefull not to flood, pool carb cleaner in intake as this is not healthy for engine either. You can do this with engine running, so as not to pool, but slowly is best, both in engine speed and volume of carb cleaner.

Jun 22, 2011 | 1990 Ford F250

1 Answer

My 2003 suzuki vl 800 misses real bad and it wont stay started without the choke being out. Could it be a spark plug or what


hi normaly this indicates a fuel problem, as the machine wont run properly without the choke you poss have a blocked jet in the carb or something, when you put the choke on the fuel is then pulled up, as the choke flap has closed of the air flow the natural thing is the vachume will pull up exsess fuel, this is fine until your engine becomes hot then the engine will start to run rough as a result of the overfueling, with respect of the spark plug if the engine runs the chances are the plug is fine, however overfueling will eventualy contaminate the plugs causing poor starting, with extreme care feel the exhaust pire from each cylinder where it comes out of the cylinder head, if it is hot then the spark plug is working just to reiterate you must ware a heat proof glove or wait till the engine has cooled down a bit before placing your hand near to the exhaust to avoid severe burns.

Nov 21, 2010 | 2003 Suzuki VL 800 Volusia

1 Answer

Kohler magnum 18 engine starts cold fine. the longer it runs the more choke is necessary to keep running. eventually when hot it wants to stall. also when going downhill it wants to stall. changed fuel...


01 Sounds like it is running out of fuel because it wants you to choke it to get more fuel.
02 Might have a restriction in a fuel line. Disconnect at carb and see if there is a good flow of fuel.
03 Loosen the fuel tank cap and see if the same thing happens. Cap might not be venting.
04 Any black smoke from muffler?

Apr 15, 2010 | Garden

1 Answer

When start bike up,it runs on 4 then onto 3 then 2 then cuts out.have stripped carbs rebuilt,balanced them.new plugs.runs fine till warm,think may be fuel problem. changed fuel tap.ballenced carbs with 2...


Are the cabies flooding or runing out of fuel? pull the choke on dose it help if it does low fuel.

Drain the bowls and see if there is plenty of fuel.....If its flooding turn the fuel off or block it when the engine starts to drop clys if it starts to pick up after 10secs or so the carbies are flooding

Feb 23, 2009 | 1988 Suzuki GSX-R 750 J

1 Answer

Stalling


Possibly faulty ignition module is the problem, stalls when engine is hot when you sit for a while it cools off and runs again until it heats up again, those are usually the symptoms of a bad ignition module and after a while it may give out all together and not run at all, usually if the module is at fault it shuts down the fuel pump so the engine don't load up with fuel, do to when engine continuously cranks over the injectors never stop squirting fuel and flood the engine do to lack of spark which is produced by the module, this could possibly be your problem.

Nov 01, 2008 | 1998 GMC Sierra

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