Any idea of what I should look for? It was working fine until my daughter came drifting back saying it wouldn't start. It sound like it just doesn't engage into the flywheel. So I turn the drive shaft by hand and tried it again. Turns a little then grind and just does a free spin like it hit no teeth. Help, I've about has it with my doo's this season. Second one to go down. Oh ya it's 2000 rx 951 carb.