thanks for the reply db, put a new hotter glow plug in put the thick head shim back in, ordered new orings for exhaust from norvell lhs said to use any oring since mine did not have in box when I bought, I got that I got ripped feeling sooooooo now that I'm over it. well the engine is back in the plan it runs supper with an 8-4 an now feel it will run well , still do not have orings yet. but I need to clear this up did not want to bash norvell for something that may not be there fault, hope they work better. this is not a beginner plane or in my opinion a beginner engine an i'm a beginner, seems to be common around here, don't think it will hang on the prop but should pull the plane on runway, maybe