Diameter of 14.38" and a pitch of 14". Marking are show contact info
R, M8B90.
Came off a Ranger Tug R23 - Yamaha F200, but the original owner said it was oversized. Tried it on a Ranger Tug R25 - Yamaha F250, and it was undersized (too high RPMs).
Everyone talks about how efficient these are, wish it would have worked for my boat. New they're $5k.
I'm in West Seattle but can also meet at the Des Moines Marina.