Hey guys, yall have been TONS of help with my many problems/projects so here we go with another one. I got a 1994 XP with the 650 engine for like $300 the guy just wanted to get rid of it. I took it home and it never fired up but sputtered then quit turning over it would only turn 1/2 the way and stop. I pulled the pump off and took off the top end. In the crank case there are pretty big metal shavings. Still I can turn by hand only about a half revolution and back it up. It just wont turn a whole revolution. What could cause this? A bent crank shaft?