Hi Dave, and a warm welcome to the forum. It's great to have another Scott Bonnar Model 45 owner on board.
You have there a Model 45 (late model twin rail engine deck) 17" cutting width.
It is unusual, we have been discussing this on the forum this morning, with another member that has a 14" Model 45 (late model twin rail engine deck) with a 2HP Kirby engine.
This engine of yours may have been repainted at some stage...because SB has theirs painted in orange....See the pic;
![[Linked Image]](https://www.outdoorking-forum.com.au/forum/uploads/usergals/2012/04/full-1147-6181-scan0054_medium.jpg)
This is a 20" machine, but the colour is the same on all Kirby's.
Yours is painted white...I have never seen one in this colour scheme before.
The blade adjustment has not run out of travel....you have plenty of thread left on the bottom of the bearing hanger...for adjustment advice, see the video...Click
HERE This will step you through the procedure.
The cylinder reel has plenty of life in it; but will need re-sharpening as will the bottom blade....check out the SB threads in the Repairs and Maintenance forum for instructions on Removal of the reel and soleplate.

Can you also please post some pics of the chain-case with the cover removed and close-ups of the sprockets where they are not covered by the chain...this will allow us to assess the condition of the sprockets and chains.
Once again Dave,

to the OutdoorKing forum.
