Engine starts fine when it is cold. Runs good. When it has been running a while and the engine is hot, then after being parked 10 minutes or so it won't start. It cranks just fine but won't fire up. Spraying a little WD-40 in the air intake makes it fire up every time.
Any clues as to what could cause this, or suggested diagnostics that could reveal the cause?
Thanks, Bunny