fedup2d8,

It looks like it could be a four stroke Kirby H4 engine which was fitted to the scott Bonnar model 450407 but not 100% sure.

Can you read the information on the plate near the starter which is pop riveted to the frame?cheers2


Regards,
[Linked Image]

Bruce


Please do not PM me asking for support. Post on the forums as it helps all members not just the individual.