1973 85HP Trim / Tilt

[Yammerhead]

I just finished moving the Merc engine to my boat. I have the trim motor mounted under the splashwell. I am going to connect the hydraulic lines but I am wondering if it matters which hoses go where. I can't see why there would be a difference as both cylinders are going in the same direction all the time. Also, of course, when I did the swap, it puked oil all over both boats, me and my shop floor. What type of oil is supposed to go in these systems?

Thanks!

 

[Laddies]

Re: 1973 85HP Trim / Tilt

No just hook them up to the proper size fitting amd the system uses Dextron 2 or 3

 

[Chris1956]

Re: 1973 85HP Trim / Tilt

Yammer, That system originally used 5W-30 motor oil. The newer PTT systems use Dextron III ATF. You can likely use either fluid, although if your seals are marginal the 5W-30 oil will leak less.
Those PTT systems are not self bleeding. You need to use gravity and the 2 bleed screws on each cylinder to get the air out.