These motors are so tough but run on straight petrol soon damages them and if the main bearing have been damaged enough to allow the flywheel to touch the coil(i doubt this could happen) but if this is the case then the crank pin would also be damaged (not bent but the hardening damaged) and I have not seen new crank pins for sale, they may be but if you have to rebore,if you can still find somebody who can do it, small bore rebore places are thin on the ground now,new piston ,rings and bearings ,this motor will end up an expensive rebuild. As I said earlier pick up another mower for $15/20 and good chance you could get a good motor
