Preston_Hall
Well-Known Member
- Joined
- Nov 4, 2003
- Messages
- 2,025
Don't expect some huge gain. Or maybe none. Your needle, head clearance, pipe, and prop may or will be changed.
With a 21 most people do not get enough heat into the motor to burn what is there. A motor should almost burn your hand after holding it for a few seconds.
Run between 12-15% oil and you are fine. I would try that first.
With a 21 most people do not get enough heat into the motor to burn what is there. A motor should almost burn your hand after holding it for a few seconds.
Run between 12-15% oil and you are fine. I would try that first.