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Mower runs for 10-15 mins. ands shuts off

I can cut for about 10-15 mins. and the engine starts to spit and sputter.If i disengage the blades the it starts to run smooth again for a min. or so then shuts off.

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  • josh1111 May 11, 2010

    sound like a safteyfeature somewere is going bad, does it have a saftey shut off on the seat? try jumping it

  • joe May 11, 2010

    if not a safety switch (as mentioned by josh1111), then i would look at overheating. check to see if the spark plug is the correct one for this mower. if its the wrong heat range, then it will act like this.



    if the right plug, then you may have contaminants in the fuel system (gas tank, filter or carb) that might be obstructing a fuel line or carb jet. may require removing the carb float bowl and see if there is rust in there. i have had this on my craftsman lawn tractor to the point where the rust caused a hole in the carb bowl.

  • Anonymous Mar 28, 2014

    After about 20 minutes, will start again and runs for about 2 min

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  • 26 Answers

I had the same problem on my craftsman 18.5 hp, the problem was in the choke, the spring was broken, and the choke was not free, replaced the spring and it is fine now. Check it out. Good luck.

Posted on Aug 12, 2012

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SOURCE: Mower runs for 10-15 mins. then shuts off.

I would agree with the gas cap being the problem. There should be a insert inside the cap which helps with the tap pressure. If this is lost then the engine will run for a few min. and shut off.
There is one other thing and that is the float in the carb bowl. It may be allowing in just enough gas to fill the bowl and then it is sticking. This would account for just enough fuel to run for a brief period and then shut down.
VTX Guy

Posted on Mar 10, 2009

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