I bought a 425 AWS with a poor engine. 20 hp Kawasaki I found a bad crank bearing. The crank looks ok. The surface is not scored or grooved. Looks like a little of the bearing on the surface. I think i can get some fine emery cloth and polish it out. Pistons cylinders everything else looks good. I think I'm going to do a cheepy repair. Bearing rings gasket set. See how it goes.
This unit has 1700 hours on the clock. Anyone know if this is a common problem for these engines when the hours get up there?
My main tractor is a 425 and it almost has 1700 on it so I'm hoping its not a common problem.