Vapor lock

[kji3114]

I have an older Craftsman push mower that starts first pull and runs great, until I turn it off after maybe 20-30 minutes use. Then it won't restart for at least 20 minutes or longer, it has done this for years. It doesn't usually happen until the outside temperature is above maybe 75 degrees. Suggestions?

 

[ILENGINE]

Do you still have fire at the spark plug during that period that it won't start

 

[joemoss]

I experienced the same thing once and found the kill wire slightly melted to a cooling fin.