What oil do I use in my 1983 Alpha one stern drive

[briang0]

Hi
What oil do I put in my 1983 Alpha One Stern drive the serial number is 6227245 I can't remember what I used last time. I looked in the Service manual but couldn't find it in there. I did multiple searches but couldn't find anything. It's the last thing I have to do before I get her in the water. Thanks in advance. Brian

 

[kghost]

Either merc high performance gear lube or standard gear lube.
High performance is prefered

 

[Bt Doctur]

Any quality 80-85-90W MIL SPEC 5 ,anti-foaming gear oil.Per kghost hi-perf or standard lube