1958 Mark 58E forward gear bearing part number change?

jeepjack1995

Cadet
Joined
Apr 26, 2017
Messages
28
I am in the process of rebuilding the lower unit on my 1958 Mercury Mark 58e. I bought a new gear case ( P/N 1603-1868A4 ) and was hoping to swap the guts from the bad original case into the new case. It seems that the original forward and reverse gear bearings won't work with the new case. From what I can understand the gear case I ordered was upgraded from original and I'm assuming the bearings were upgraded to fit in the new style case as well. Does anyone know what part number(s) the upgraded bearings are? Any information is greatly appreciated.
Thanks,
JB
 
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