ok this may sound wierd but its a brand new force .12 and it ran funny when i was braking it in and it started raining so i put it down for a few days. so it was sitting for a few days and then i pulled pull start and it slipped, (but i wasn't sure what! slipped) so i take plug out and see if pistons movinns but I'm pulling and its not goin anywhere, occasionaly it would catch but then fall off. so i take pull start off to see if its the dam bearing, but i knew it couldnt be cause its brand new, i even took bearing and spun it on shaft and could see it was biting perfectly fine. but piston wouldnt budge, sumtimes it would bite but the it would let go, this ever happen to anyone?? ok let me no