If it hasn't ran for long time it likely needs either 1) new crank bearings 2) and or the crank vent under exhaust port permanently disabled. If it recently started idling like that, you likely have a carb/intake leak.
Turn the idle screw clockwise to turn idle down.
8th Feb 2021, 11:47
If it hasn't ran for long time it likely needs either 1) new crank bearings 2) and or the crank vent under exhaust port permanently disabled. If it recently started idling like that, you likely have a carb/intake leak.