Hi brisy, and a warm welcome to the forum. we all like to learn new things and tinker here. grin
In order for us to help you, can you please post some large pics of your machine preferably from different angles; also any numbers on the machine plus the make of engine and the whole string of numbers for it also.
This will help us ID the machine. wink
I can tell you Scott Bonnar did not make a ride-on machine, however SB was taken over by Rover in 1980....and they did manufacture ride-ons.....so it may be a Rover wink

Once again, brisy, :welcome: to OutdoorKing.
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