+1 I have thrown props and spinners from being too lean, never too rich. I set my HS needle by finding peak then backing off about 1/8 turn. This is done with about 1/2 tank of fuel. Then hold the model vertical at full throttle to make sure it does not lean out too much.
10% nitro and an OS F plug are perfect for that engine.
Last edited by JPMacG; 11-27-2015 at 09:19 AM.