Question about Troy Bilt 5.5hp Self Propelled Mower

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Mower starts but instantly shuts off

My mower starts just fine but instantly shuts off each time. It will not continue running.

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  • rtallen1985 Mar 22, 2009

    I have the same problem my mower will start fine and then shut off i cleaned the carbureter and it still does it. I can keep it running with carb cleaner but it wont run on it's own. what should i do?

  • wpashe
    wpashe Apr 20, 2013

    I had same problem and removed the float bowl and blew thru the tiny hole in the screw that holds the bowl on and it now runs fine.

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  • 48 Answers

Either water in carb bowl or plugged high speed jet

Posted on Oct 21, 2008

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19hp yardman riding mower


Hi Lisa:
If it won't shut off then the ignition is on all the time.
If the start switch won't spin the starter, then the switch is not working.
Something happened to cause this problem.
Who did what to the wires? or
It did it all by itself in which case the switch needs to be replaced.
I would use a continuity meter to check the function of the switch and make sure the wires are correctly connected.
Hope this helps.

Jul 15, 2016 | Yard Machines Lawn Mowers

1 Answer

Mower start fine. Runs for 20 min or so and then runs ruff and shuts down. Restarts fine and shuts down appr. 5 mins later. Has new spark plug,air filter, fuel filter and more than enough gas.


It's one of two things. My first thought is that you have a clogged gas cap. Try loosening it when the mower starts to run ruff. If it smooths out again and runs fine, then you know that the carburetor is not venting properly. Either buy a new gas cap or clear the breathing holes in the cap, if possible.

The only other thing it can be is that your Ignition Coil is going bad. A bad Coil, once it gets hot, will shut down. But it usually takes longer than 5 minutes for them to cool down well enough to start back up.

My Vote is the cap!

Good Luck!

Jim

Aug 18, 2011 | Poulan Lawn Mowers

1 Answer

Mower start up and runs, but starts to cut back, and smokes just a little bit. The mower stops smoking when it throttle up. It will continue to run but not at full throttle. I can hold a finger gently over...


It sounds like she's being deprived of the correct fuel / air mixture due to a dirty carburetor (the biggest problem with mowers when gas is left to sit for a period of time). If you do not know how to take the carburetor apart and clean it thoroughly, then I suggest taking it to the local shop (hardware store or mower shop) and having it tuned up. It'll probably be just fine and worth the money. Hope this helps and good luck.
James

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Lawn mower will start when primed but will only run for few secon


It starts because of excess fuel from priming. It usually then gets it fuel from main jet in carb.

You need to find the main jet and run a fine piece of sturdy wire through it. That will restore fuel flow so your mower can continue running after the priming fuel is gone.

This is a good thing to learn. Main jets tend to clog a lot on mowers these days.

Jul 05, 2010 | Poulan "Poulan" Push Mower

1 Answer

Lawn tractor runs fine then shuts off then runs fine then shuts o


Sounds like you will need to clean your carburetor.
Sometimes you can get by with priming it a few times, and letting it
run a few times like that and it will flush the gunk out of the jets,
but most of the time you will need to rebuild the carburetor.
If the mower is over a couple years old, then I also recommend that you
buy and install a new carburetor repair kit, because the diaphragm will
get hard and that will cause it to be hard to crank.
When you clean your carburetor and remove the jet screws, count the
number of turns it takes to seat the jets from their original position.
That way when you go to put the jets back in, you know how many turns
they were in/out.
Please do not forget to rate me, Thanks
Good Luck, I hope this help

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Mower starts fine but won't stay running. I have


Have you checked to make sure the jet in the carburetor is cleaned out. If the mower starts with primed fuel but shuts off after that fuel is burned out, you have some blockage not allow fuel in to the intake.
HTH
Good Day.

Oct 27, 2009 | Lawn Mowers

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