Im putting an EI on a Homelite 30cc. I set up the intial timing around 4 degrees BTC. It flip starts and idles just super, but it does not make Good top RPM, it gets to about 6300 and thats it, this with an 18x8 prop. A 30cc Homie ought to get 7000+ with a stock magneto. I tried another carb (My master carb, a carb I know to run perfect) and same result.

The engine appears to be in perfect condition and has excellent compression. I changed the initial to around 10 degrees BTC and the engine would not flip start any more. One thing I noticed was the base gasket between the lung and Block is missing. Someone trying to get more compression out of it I guess. I wonder if removing the gasket would change the port height enough to screw up the Power output??? Any ideas, and what should the initial timing be? Thanks