Engine Knocks

1. Check ignition timing. If timing is too advanced, adjust as necessary. If timing is satisfactory, proceed to step 2.
2. Inspect spark plug. If plug is running too hot, install colder type spark plug. If plug is satisfactory, proceed to step 3.
3. Inspect distributor. If governor spring is unhooked or broken, repair or replace. If pin hole in governor is worn, replace governor.