How to know if drive is good not on boat.

Tow Joe

Recruit
Joined
Jun 9, 2009
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5
Just picked up a used mid 80s alpha drive for my 3.0 merc due to the fact that my upper unit is smoked. The input shaft wont turn. I opened the cover and everything looks good, just a little rust from sitting. I was wondering if i should take the lower off and see if the input shaft turns then. Any advice?
 
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