Re: 1957 Marcury Mark 55 40 hp Lower unit Help

[PM T2]

it may have been put back together with the shift rod in the wrong orientation relative to its coupler. You may need to drop the lower unit and get the shift rod in the right position, then re-assemble. When in the correct orientation, it should shift easily between F-N-R. I have found that trying to shift gears without the drive shaft rotating makes it tougher to do so. Hope this helps.

best,
PM T2

He's livin' in his own private Idaho..... I hope to go out quietly in my sleep, like my grand-dad did..... and not screaming, like the passengers in his car...