Too follow up…
To repair, I’d pull the motor housing and remove the starter clutch. You’ll need to pick up a starter clutch wrench at a lawnmower place. Use the motor model and serial numbers to get a replacement clutch. Save a trip and buy the wrench and clutch at the same time. Screw it back on snugly tight with the wrench. Don’t get carried away and strip the crankshaft threads. replace the housing and try it.
Prior to solid state ignition - I replaced over a hundred points & condensers on lawn mowers in my dads shop. That required removing the starter clutch and flywheel. Not a big deal at all. That was very, very routine servicing prior to solid state.
Outboards are very similar. Except they are a major PITA to work on because you need a water tank. you’ll burn up an outboard starting it without water. Dad serviced those too and taught night classes at the Vo Tech school. Small Engines was one class and Outboard motors was the other one he taught.