boy has this become a trip down memory lane.
when I bought my first boat an Islander 36 on John's Island, SC; and proceeded up to her new home port in Norfolk, VA ... I eventually had an issue with a Hurth V-drive. And being a tad too young and impatient, had it overhauled by either Metro Machine or Norshipco; I don't recall whom, it was coordinated by the local yard in Little Creek after I pulled the tranny from the boat. What I do remember is the clutch adjustment wasn't right something like two or maybe even three times; I'm pretty sure they thought I was a young whippersnapper pain in the arse. But with a digital tach I kept proving to them that it was producing a variable reduction ratio not a constant ratio, and therefore was slipping.
Once they got it right it was great for 10~15+ years until I swallowed the anchor and married, mortgaged, moved ashore.
Still have that boat, still have that transmission, both needing love and attention.
Also have a used Yanmar transmission in the shop from a raw water cooled engine block that rotted out of a customer's boat. Would have to look at it's data plate in anyone needs it. Tons of Yanmar, Westerbeke, Universal parts if anyone comes up short; mufflers, dripless seals; all the stuff that accumulates when a sailor turns repair tech and keeps going over 15~20 years.
On a different note, the kids are getting two "new-to-them" sailboats for Christmas. Found two RC models on Craigslist for $100 (both, not each) which starting Sunday may become the most utilized vessels in the fleet. I might be in trouble now, because if these count as "boats" since they don't fit in bathtub, that brings the fleet to 10 and there's only 5 kids. Oh, that's ok then. Previously I got away with owning 7 because "there was one for everyone in the family", then got to 8 because we're pushing two together (bad hull & good engine to be paired with good hull & bad engine; someday)...
Merry Christmas to All!