What oil should be used in trim pumps?
 

What oil should be used in the standard mercruiser trim pumps? I need to add oil and I don't have any of the manuals.

Trans Fluid?
Motor Oil?
Hydrualic Oil?
Power Steering Fluid?

Thanks!

Steve Mercury makes a specific power trim oil. you can buy it in any marina.

I just used straight 30w

I use 30wt too.
That's what my maunal calls for.

Thanks everyone!

Stevel,

By using thinner viscosity motor oils, that will enable your pumps to work much faster.

Steve

I was told years ago to use 20 or 30 weight non detergent motor oil. You can get it at NAPA

Typical Mercruiser. My manual says 10W30.:confused:

i have used tranny fluid in a few of my boats for years and have never had a problem........i think tranny fluid is a little thicker which gives me better accuracy during trimming

Geez now you you guys have me wondering. I was told to use transmission fluid. Now is this ok or not??