I bought the subject motor at Tomahawk several years ago,
even though it was missing the gearcase, driveshaft, etc.,
and froze up, just because I’d never seen one in person.

This was a “full” gear-shift model, and I’m guessing they had
troubles with the gearcases. I saw one listed on an old auction,
and it was also missing the gearcase!

I took it off the rack a couple of days ago, just to see if it would
have the same carb as a 46-47 Champion Blue Ribbon 4.2 hp
that I’m having issues with. It does not.

Anyway, the bottom piston was slightly frozen, and I got it
loose, but I was surprised to see it’s missing one of the piston
rings.
Anyone have a parts manual for this G3LGS model that would show
the piston ring part number? The rings are 1-7/8″ x .093 thick.

Thanks.