Hi Greg

One of our Scott Bonnar guys should be able to give you a more indepth rundown on it.

I would personally keep the old engine in the shed, and put a new ohv briggs on - this will prevent any damage to the rails the engine sits on (the old engines cause bending and cracks)

The rails don't seem damaged, but take a few photos for us to look at of around the engine mounting bolts (with dirt removed) as some cracks may be appearing

They use a br2-lm plug

Regards
Tyler