OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Walk Behind Lawn Mower Frames Question On Scott Bonnar Cylinder Mowers Scott Bonnar Clutch?

I have dismantled the two chains we think need replacing, they are marginal, it is probably prudent to replace them though.
They are; the one going to the clutch plate, and the one behind which seems to be a driving sprocket. The chains are the same pitch (I think).
Tomorrow I will go to the local supplier, with the chains, to have them replaced quickly, if they are not available tomorrow I will get them from our shop.
The good news is;
1. The sprockets are all in good order
2. The clutch plate is good too. I was surprised to find the clutch plate here, couldn't work out in my head where it was, thought it was up on the shaft.
My other problem is, how do I properly tighten the two 3/4in. nuts? They seem to tighten to a point but without securing the back I am not too sure how tight they should be.
Cheers, WallyPat