Thanks ironbark for your reply. Only thing else I can see that has been affected is a little scoring on the journal on the crankshaft but nothing major. Piston/rings/bore and bearings all ok which does seem weird, as if the conrod was the weakest link. The closest relative to my engine I could find is the model K91 which is also 4hp but presents many differences from reading the manual. I did manage to find an exploded view of the engine and will try to post but part numbers are undiscoverable. I fear finding another model the same as mine nearby will be as hard as finding any information on it.
