Craftsman 16.5hp 42 in. Mower runs for about 10-15 min . then quits. Will start again when it cools down. Have removed and cleaned carb., changed oil, air filter clean... Could you please give me any suggestions?
I am having a problem with my lawn tractor similar to what you describe. Mine runs fine for 15 to 20 minutes and then stalls. It will start back up and run for a few minutes and then stall again. When it stalls it is like when you get off of the seat with the blades engaged. I have replaced the gas and fuel filter and have cleaned the carb and air cleaner with no effect on this problem. I am now thinking that the problem is the fuel stoper located at the bottom of the carb. There is a plunger screwed into the bottom of the carb bowl that is held down when the key is turned on. If you get off of the seat when the engine is running and the brake is not on or the blades are engaged the stoper is pushed up into the main jet fuel path causing the engine to stall. I am going to fabricate a heat shield around this plunger to see if this corrects the problem.
I had exactly the same problem and checked/replaced all kinds of things as you did. This is going to sound silly, but it turns out the hole in the gas tank cap was clogged. It would empty the fuel line, then stop running. Let it sit a few minutes and the fuel line would slowly fill up and it would then run again for a couple minutes. I now keep a tooth pick in my pocket when I mow.
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Mine always starts-- and won't start again if I turn it off- going to try the flywheel key replacement-- which affects the timing-- otherwise-- let me know what you find out as a solution
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