What type oil is used in a o.m.c. outdrive late 70's?

Question

What type oil is used in a o.m.c. outdrive late 70's?

Answer 1

1970's oil.

Answer 2

A gear lube, however, not the 90 w found in the auto stores. Since you're asking this question, I realise you do not have a manuel for your outdrive. This will answer all the questions you might encounter definitively,(no mechanic can BS you) and can be found (sometimes used for even less) at Barns and Noble book stores (and on line) for about $15.00 or less. For the mean time, call a reputable marine service center and ask to speak with the service manager.