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I've discovered a note in my Yanmar manual that the orginal owner changed the gear box from a 2.83 to a 2.14. This is on a 3HM35F, 34 hp, 1 inch shaft, PSC34. Can anyone tell me why one would make this kind of change in the gear box and what implications it will have. The vessel came with a MaxProp which is currently on its way back to PYI for a rebuild. If I don't have the orginal gear box I'm not sure how to interpret my RPM's and performance against manufacture specks and fellow PSC of the same class.
Carl
s/v Credence II
#159
Carl
s/v Credence II
#159