Gearcase Oil....old outboard

[JFDBasser]

Well, I found a gascap for my 1970's Sears Ted Williams outboard... who would have guessed that sears still has parts.

Anyway...I figure I probably need to change the gearcase oil.....does anyone know if I can use Optimax racing gearcase lube? I have a bunch on hand for doing my big boat during tourny season..just wondering if it will work ok for an old motor.

 

[Pappy]

It should work just fine. I currently use the BRP version of current lubricant for my old motors and no detrimental effects. Nice thing about the BRP version is that it can maintain 100% effectiveness with up to 25% water absorption. I imagine Merc's stuff is comparible. Viscosity wise you are in the ballpark also.