Hi
SchoolSavers, and a warm welcome to he forum.

It is always nice to have another Scott Bonnar owner on board, as we all like to learn new things and tinker here.

Without photos of your machines we cannot help you, as we unable to ascertain what models you have..Scott Bonnar produced many models from 1928- 1983 prior to the take over by Rover Mowers Australia.
Instructions for posting pics using our Inline Uploader can be found...Click
HERE As this is
not the correct thread for your questions, can you please start a new topic
HERE and we will give you a detailed reply after seeing your pics.
Once again SchoolSavers,

to OutdoorKing.