Grenaded: as in the timing gear cracked, exploded and poked a hole in the top cover. About 60 bucks to get new parts but what about the lower end ? The timing gear is made of some kind of plastic so running a magnet thru the crankcase won't do any good. Anyway, I opted for a new unit. Still wondering about the 30 plus claims from some with a 35 cc of any make or model.