UPDATE on this one.

The parts mower I picked up is in overall better shape so I thought I would get this one running and pick the best engine to restore.

Cleaned up the flywheel and put it's original coil back on. No matter what I do I now cannot get spark from this one. FRUSTRATING!!! I know the coil, leads and spark plugs are fine so it must be the points BUT I have run into a problem I have never encountered before ... HOW do I get the flywheel off?

Usually I would just remove the spark plug and fill the bore with rope until it blocks stops the piston BUT no matter how much rope I put in both cylinders I cannot stop the piston moving. I checked and the pistons ARE moving through the cylinder so no problem there but everytime the get to near TDC and I feel tension when turning the flywheel by hand it just releases and starts moving again. I cannot get anywhere near enough tension to actually undo the nut. Am I missing something? Is there an obvious solution to this that I cannot see? Do I just need to feed more rope in?

Really hoping to get this engine going as the body is in much better condition and the bottom exhaust plate is not completely rusted out like the other one. If need be I'll just swap the engines over but I would rather not do that and keep the original body with the original engine (I know it's exactly the same and no records of what body goes with what engine but I'LL know and that's what matters).

Thanks for your help guys.