trans fluid or trim fluid
 

in my manuel it says you can use transmission fluid if you dont have power trim fluid, The reason im asking is that i have a leak in my 150 mercury out board but i cant locate it, sounds funny but its the truth, so instead of buying trim fluid whitch is more money can i use trans fluid, is it the same, anybody know? thanks
my mechanic said if i hold it to the up position and hold it there it puts the system on with the greatest preasure so i should be able to find it then, im going to try it as soon as i get the batterys in it.I live in the n.e. new jersey so the weather isnt that good yet to work on it but very soon as soon as i get my house in order [thats what my wife said]

I would NEVER use atf in a trim system... I have had to repair a few that had atf and some water in them and when atf mixes w water it becomes the nastiest goop ever... a true nightmare to clean out.... top it off and find the leak... hint... it's most likely the seal on the cylinder or if it has a hose that is another possibility

thanks for the come back I new it was to easy I guess why its more money thanks again

Last I checked ATF was the same stuff except dyed red and had friction modifiers in it that trim fluid doesn't have. You could also substitute power steering fluid if you're in a pinch.

eh... YMMV but I very much did not enjoy my experience with it....

I have used jack oil in a pinch, I got lucky I guess

10W30 motor oil is specified by mercury before they started repackaging it as trim fluid. BTW, ATF has the same viscosity, just has a lot of detergents in it

off the subject but i also heard from numerous people that you can recharge your K&N filters with ATF also. its the same stuff that K&N sells. FYI

Exactly correct. ... AND, like MJ said, jack oil will also work. In fact, ANY hydraulic oil will work. We buy 55 gal drums of hydraulic oil for our bulldozers and excavatrors and etc, and you can use that stuff also. THEFERMANATOR hit the nail on the head, the only difference in all of them is the different additives that manufacturers put in the oil for different reasons. And any water, in any oil, makes a mess that has to be cleaned out, because it makes oil loose lots of it's friction and corrosion fighting properties. (Although technically, you could use water itself as a hydraulic fluid in a cylinder.. the friction and corrosion that would result would ruin the cylinder in a short time, but in an emergency you could use it.)

So im realy confused now,, would you use it or not use it