1965 mercury 3.9 Lower Unit Swap
I have a 1965 Merc 39, 3.9hp with a broken lower unit. Would a lower unit from a 4 to 6hp close to the same vintage year be compatible. I can't seem to find a 3.9, seems hard to come by. Thanks.
Last edited by matu00 : October 4th, 2008 at 10:29 AM.
Reason: Typed in wrong year
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