Outboard Motor Forums (by brand) > Mercury/Mariner Outboards

Torquemaster lower unit oil

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sbg:
I think I remember Charlie saying that when you change the lower unit oil on a torquemaster you use 28 ounces. Not until the fluid comes out of the top hole. But I cant remember for sure. Thanks!

Curt:
@bullet20dc This one's for you!

bullet20dc:
yep 28 oz  however at 28 oz it wont come out the vent unless u didnt allow it all to drain completely.  I have tried an experiment to fill it till it comes out the vent and it took over 32 oz.  I just put in what the merc manual says 28 oz.   Been doing that for more years then Ill admit to so it works.  remember if you use synthetic  Dont reuse the o ring seals. and keep an eye on the oil. pop the bottom plug every once in a while and see if you have water intrusion.  synthetic doesnt mix as well with water as dyno oil and will come out clear. Dyno oil comes out like coffee with milk color.  believe it or not synthetic will give you a few more 100 rpms but way less forgiving with any water in that lower.  Royal purple amsoil or lucas are brands I been using with good success.  Not dropping brands here just a statement.

Curt:

--- Quote from: bullet20dc on January 18, 2017, 03:55:33 PM ---Royal purple amsoil or lucas are brands I been using with good success.  Not dropping brands here just a statement.

--- End quote ---

Thanks for the tips regarding good brands. Always good info  :thumbup:

sbg:
So synthetic would be ok to use?  I was gonna go back with the 90 weight gear lube plus from Mercury. Thats what Ive been using but am always open to suggestions about other brands. Ive been using amsoil 2 stroke synthetic engine oil with great results so far.

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