Originally posted by Voodo_Magic
ok i have jus tried to turn the fly wheel and it spins around 60 deg and the it is hard ot turn the next 30 deg and so on. I have taken off the head and the top of the piston is black, the flywheel seem hard to turn when the piston is comming to the top of the engine ( like the top is smaller than the bottom and it rubs) sorry for all the questions iam new to this engine tuning!
Sounds fine. I think the loss of power was a little warning by your engine that you were a shade bit lean. A properly tuned motor will run with the same power no mater how long you run it. If this happens again pull into the pits and get your pitman to richen the lower needle or middle needle a 1/4 turn (middle if it is too hard to get the lower one with body on).