OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Walk Behind Lawn Mower Frames Question On Scott Bonnar Cylinder Mowers Honda Engine to Suit Model 45

Llew, plenty of cheap horizontal shaft motors out there,$120/150, find somebody with a lathe and they could bore and sleve the clutch hub to suit the shaft you end up with. Just need to check the motor height, shaft center to base so the clutch will line up correctly.
Here is one with a 3/4" shaft
http://www.ebay.com.au/itm/6-5-HP-OHV-ENGINE-Horizontal-3-4-straight-shaft-GR8-4-GO-KARTS-Logsplitters-/301286684541?hash=item462615f77d:g:ytIAAOSwRLZT9eE5

Not sure it may be a bit wide but there is plenty of these just put into ebay, horizontal shaft motors