Re: flush attachment for a pre 80s lower unit
That is, as they say, a good question. The outboard is a 1980 mercury 70. Ser 5651730. The lower unit is long shaft that bolts on well, and has the correct ration of 1.64:1. But it does not have the speedo pitot tube hole that the fitting would screw into (there is a cavity there) and it has a flush plug (which the 80 didnt). The most accurate advice I believe Ive been given so far is that it is a pre 80s unit. Thanks!