tilt / trim hydraulic fluid all the same ?

[fishhunter]

I have 1979 200hp merc o/b with a leaky t/t reservoir (leaks during operation only )the joy bottle of fluid from previous owner is empty.The only numbers i can find on the unit are 6791 4A1 can anyone tell me the proper fluid for this unit? would like to avoid buying Mercury fluid if a no name brand will do the job

 

[petryshyn]

Re: tilt / trim hydraulic fluid all the same ?

I believe the pump says 20W right on it. 5W30 will work as well (Seloc)

 

[fishhunter]

Re: tilt / trim hydraulic fluid all the same ?

thanks schematic ... (seloc) ?

 

[petryshyn]

Re: tilt / trim hydraulic fluid all the same ?

Seloc Publications = aftermarket manual

 

[mbb]

Re: tilt / trim hydraulic fluid all the same ?

my manual says to use 10W-30, but I put in 10W40 cause it was all I had handy. It still works....

 

[petryshyn]

Re: tilt / trim hydraulic fluid all the same ?

Mbb<br /><br />In a warm climate, you likely won't have problems. I believe the OEM asks for straight 20W

 

[fishhunter]

Re: tilt / trim hydraulic fluid all the same ?

Thanks again guys...I guess the next step will be to stop the leakage...the fill/dip stick screw head is kind of striped (straight slot head) are they hard to find ?

 

[petryshyn]

Re: tilt / trim hydraulic fluid all the same ?

is this what you have?<br /><br />

<br /><br />If I remember right, the fill screw on the TnT is a 3/8 NC. that means that a fill/vent screw may work from a lower unit. They will be easy to find....(you want to stay with stainless steel)<br /><br />*you may need to grind the screw edge to fit