Lower unit interchangeable

[Utt2033]

1978 115hp mercury 20.75 shaft length from top of water pump serial is 5595430 looking for new lower unit cracked mine other day just wondering what years are interchangeable my shift shaft has a spline type

 

[racerone]

Most of the inline 6 models ( 90 and 115 HP ) will fit.----Make sure the shaft is stainless.

 

[Utt2033]

Most of the inline 6 models ( 90 and 115 HP ) will fit.----Make sure the shaft is stainless.

Thanks