Hi Stationary, the Model 40 Scott Bonnar was first introduced in 1960 and was powered by a 75cc Villiers 4stroke engine, which, by the way is the one on your machine...the carby is correct also. It has a cutting width of 14" and has an unusual drive set-up....a rubber wheel running inside a steel drum.
Scott Bonnar, at that time, did not use American engines.
The Model 40 was also known as a "terrace mower"
Here's a pic.... [Linked Image]
It was painted in an aqua green solid and had the 60's style decals, as you can see in the pic. wink
cheers2

Please do not PM me asking for support. Please post your questions in the appropriate forums, as the replies it may receive may help all members, not just the individual member.
Kindest Regards, Darryl grin