[ssherm2]

I have an old 111 that runs/cuts great..............for about 15-20 minutes, then it shuts down as if the key was turned off and will not restart until it sits (cools down possibly?) for an extended period of time.

I've been told it could possibly be the ignition module?

Any thoughts/ideas?

 

[RandyM]

Sounds like a good place to start. Don't count out the coil either. Good luck.

And, welcome to DT.

 

[tackit]

Make sure the gas cap vent is open and the gas line is not pinching closed from vacuum.

You can try heating the coil with a hair drier or heat heat gun to see if you can stop the motor from running in less than 15 minutes... being careful not to over heat the coil.

Check the inside of the tank to see that it's clean.

Change the gas if it's been in it awhile, some states don't require their gas stations to have signs on their pumps stating their gas has a percentage of ethanol in it.

Less likely but If the engine has a low oil engine stop switch and you don't have enough oil in the crank case going up or down hills could shut the motor down.

I'm not a mechanic, just throwing out ideas.

 

[jfoi]

when it shuts off, try checking it for spark, if no spark then it most likely will be the ignition module