OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Walk Behind Lawn Mower Frames Question On Scott Bonnar Cylinder Mowers Hello Everyone

Hi xhall, and a warm welcome to the forum. It's always nice to have another Scott Bonnar Model 45 owner on board, as we all like to learn new things and tinker here.
What a wonderful feeling you will have when your SB 45 is restored to its former glory....Your Grandad would be proud!
Your machine is the later twin-rail Series 2 design and is period correct in original condition, except for one minor difference....the knob on the cutter clutch engage handle should be black rather than red. This can be easily corrected.
We can't tell you the exact date when your machine was manufactured, but we can get close, if you could post the whole string of numbers stamped into the metal air-cowling of the Briggs engine...See the pic here for the location:

Looking forward to helping you with your resto,

Once again, to OutdoorKing.