You forgot a carburetor might be missing,,,, as well as what else planecrazee said,now im wondering if i timed my engine off the right cylinder ,looking forward,did i miss something? Maybe ill have to split the difference,or maybe not you did say that a degree or two dosent make a big difference ,as long as its close to 28 deg. but yes thats why i was really surprised that one would come with such an obvious missing part,im also reading that the little plugs dont perform as well as the semi costly rimfires.,and theres little issues like the sloppy fitting prop washer and ,a bolt that wont accomidate a spinner ?if each engine was completely assembled at the least,and shipped ,without being pre tested/ run,it would cure several issues i, even had one guy pm me about getting his started,,see this makes my point,its actually a great runner,,,but why let ,untested engines out it causes ,bad feelings ,and lots of people considering getting one of theese ,do browse ,theese forums to see what we are getting,