OMC 175hp "Engine: Trim Hyraulic Fluid?

[pkaufman59714]

I have a 1977 Cobalt 17 which has the Elertic Hydrualic engine trim and like to know what lubrication should I put in the engine trim pump? Specifies OMC Premium Gear Lubricant? Is this an oil or more transmission fluid? Are there other oil I can use safely in the system?

 

[Scott Danforth]

in the trim system..... engine oil (SAE 30 was being spec'd back then)

in the drive, type C