I've rebuilt a few of these engine's, Honda, Chonda, and the Victa V40 OHV engine. A vast majority of the parts ARE interchangable. The governor system and mount inside the crankcase varies though. As far as the camshaft, the only thing to watch out for that comes to mind, is that there is a diference in the camshaft's for the PTO models. Unfortunately I don't have any spare at present.
The main problems I've seen with these engine's is the big end comes loose, so check the tension on the bolts while it's apart, and coil failure.
Cheers.
Last edited by Greg Holmes; 25/11/11 11:44 PM.