gearcase compatibility question

huntandhook

Seaman
Joined
Jul 29, 2005
Messages
58
I am looking for a used gearcase for my 1979 Johnson 40HP, 40R79E. Does anyone know what years and HP of motors would be compatible? It does not have thru-hub exhaust. I also wanted to know if it is okay to change individual gears, or if they should only be changed as a set. Thanks for the help, P
 
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