OS FS cam questions
Hi!
All OS FS engines use the same cam-setting procedure.
Turn the engine over so that the drive washer aligns with the small mark on the housing (the mark is located just behind the drive washer on on top of the housing that cointains the front ball bearing). Now the piston is at top dead center.
Open the cam-housing !
The cam has a punch mark on the side on one of the gear-tooth, this marked tooth should point straight down and align with one of the female teeth on the spiral gear crankshaft......that's it!
Regards!
Jan K
Sweden