Has anybody run ATF fluid in their power steering system. I just had external steering put on and they added tranny fluid in the system. Just wondering if I should leave it as is or flush it out and put in the power steering fluid thanks.

atf is fine per mercruiser manual--joe

Do it all the time. Never had a problem with it.

ATF is the best way to go. But you also can use regular Motor Oil. I owned a few Cabs and the Mercedes Benz Pump sometimes leak a little bit. In our garage we use regular motor oil it is mucjh cheaper than atf and works as good as atf.

Is the ATF the same as the powesteering fluid you get in the mercury bottles. Are they compatible or should I just use straight atf from now on. Thanks

"But you also can use regular Motor Oil. "

WTF...your pump will run HOT as all hell!....AFT is NOT the same as PWR steering fluid...yes use ATF in your boat....don't think you can get away w/it in a modern day car and run at hi speeds...u WILL melt the plastic res. right off!

just FYI! i know a thing or 2 on this subject!

Motor oil? That sounds a little thick for steering to me.

A lot of people run ATF in their steering systems. I was told to run "clear" power steering fluid in my external system. ATF won't hurt it but they said the power steering fluid will "respond" a little quicker.

The only thing I can say is we did so and it works. And you know a cab is on the street 24/7. But maybe the power steering in a Boat is more high performance part than in a car. I don't know.