I was checking my fluids and noticed my hydraulic trim resevoir tank was just under full and it dawned on me i don't know what type fluid it is

Either the quicksilver power trim or SAE 10W-30 or 10W-40 (regular motor oil). Per the service manual. I have been running 10W-30 for a couple of years.

Rene

I failed to mention it looks red

I just replaced a trim pump reservoir on Saturday. The marina's mechanics use Dexron III ATF, and that's what I used. Works fine for me.

thats what i figured just wanted some opions thanks

i called merc direct and asked them when i got mine.... they told me 10-30 motor oil. i put the same mobile 1 in those that i do in the motor and they have remained clear and clean as opposed to the other which turned grey and ugly in short order

so it sounds like atf in the boats trim res. and 10w30 in the outdrive trim

You can run ATF or 10W-30 in any or all. The pumps are the same. ATF will give you a little faster trim though.

COOL ya'll rock, thanks for the help you guys. never had a boat with all these hydraulics onboard !!!! thanks again


Luke