1973 merc 1150 Tilt and trim motor oil 20w?

[rhayes2849]

Ok, pump is rebuilt and working fine! It says use 20w oil, but I can not find that oil anywhere, the boat store or auto part stores. Can I use something else? It has some brownish oil in it but I am not sure what it is. The trim and tilt motor is mounted inside the boat.

Thanks

 

[Alumarine]

Re: 1973 merc 1150 Tilt and trim motor oil 20w?

10W30 should work fine.
Or use dexron auto trans fluid.

 

[Chris1956]

Re: 1973 merc 1150 Tilt and trim motor oil 20w?

My '77 Merc 1500 PTT called for 5W-30 motor oil. The PTT unit is the same as yours I believe. People do use ATF. I would not think you want to mix AFT and motor oil, so make sure you know what is in there.

 

[Laddies]

Re: 1973 merc 1150 Tilt and trim motor oil 20w?

ATF will mix with any petroleum base oil that's why it was recommended for awhile

 

[rhayes2849]

Re: 1973 merc 1150 Tilt and trim motor oil 20w?

Thanks for all the help. I used 10W30 Full Synthetic. A Hydraulic pump mfr told me to use that. It works fine just finished it.

I love the water!