Hi William, and a warm welcome to the forum. Its great to have another Scott Bonnar owner on board. grin
Your machine is a Model 30 SB 'Queen', first introduced in 1958.
I have found an 'Operators Manual, covering early and late 2 speed models. Click HERE

In order for us to be able to help you with the repairs, we will need you to post some pics of your machine from different angles; including the offending area where the previous 'tenants' improvements to the height adjusters. wink
Once again William, :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