1972 80hp merc/ lower unit

[shawpdx1]

got this the lower unit is good but the housing around the prop is cracked so the retainer wont screw in to hold the shaft in for prop. what year if any housing will fit this lower unit?

 

[Chris1956]

Re: 1972 80hp merc/ lower unit

The gearcases from the early 70s to the late 80s for 4 and 6 cylinder inline motors are the same.

it is probably just as easy to pick up a good used gearcase. Some of the 4 cylinder inline gearcases had a lower gear ratio (2.3::1), versus the standard (2::1) gear ration. A prop change will mitigate this issue.