OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Walk Behind Lawn Mower Frames Question On Scott Bonnar Cylinder Mowers Scott Bonnar Original Engine - Rebuild or Replace?

It depends, does the original engine require rebuilding?

It all comes down to if you want it original or not, you could recondition the old engine fairly easily if it was not too worn and needed just a simple set of rings and gaskets.

Otherwise you could get a similar type of horizontal shaft engine new off the shelf like a honda, etc and put that on.

Deejay on this forum is running a honda on his SB instead of the original B&S motor, maybe ask him if there was any drama swapping to a different brand.