[pikfish]

I have not seen your motor but let me make a general statement; On any motor and especially a small one, the idle jet is very small! This means that any gum or other contamination will clog it first. If you have left the motor sitting for any length of time, the fuel will clog the idle jet and cause it to not idle but may run at higher RMP’s OK (on the other larger jets). The fix is to drop the float bowl and unscrew the idle jet and either clean it or replace it.