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Oil bath bearings / oil type??

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  • Oil bath bearings / oil type??

    I bought 2 stroke 50W oil for my oil bath bearings is this the one to use???

    And it is semi synthetic.
    -=MasterCraft All The Way=-
    sigpic
    MC X45 SS Crusader 8.1 HO 2007
    Malibu WAKESETTER VLX SS 2009 400hp
    MC X-Star MCX 2005
    Tige 20v 2004 black scorpion 6.2
    MC ProStar 190 1995 275hp

  • #2
    i don't have oil bearings, however, i don't believe 2 stroke oil is what you're looking for. you'd probably be better off with some type of gear oil, like for a rear diff.
    Guns don't kill people, I kill people

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    • #3
      I would think 80 or 90 weight.
      OH-IO!

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      • #4
        Unbolt the fill plug, add 80-90 weight gear oil, apply Never-Sieze to the fill plug and torque it down to about 7 ft-lbs.
        '04 MariStar 230VRS/MCX

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        • #5
          Why does the see through cap then say that one should use 50W oil and nothing else?????????
          -=MasterCraft All The Way=-
          sigpic
          MC X45 SS Crusader 8.1 HO 2007
          Malibu WAKESETTER VLX SS 2009 400hp
          MC X-Star MCX 2005
          Tige 20v 2004 black scorpion 6.2
          MC ProStar 190 1995 275hp

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          • #6
            Originally posted by wilhelmwake
            Why does the see through cap then say that one should use 50W oil and nothing else?????????
            Dunno...

            ...from the MasterCraft trailer owner's manual
            Attached Files
            '04 MariStar 230VRS/MCX

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            • #7
              I'll go get my manuals and see myself, but like said the see thru cap says that one should use 50W oil. It does not specify at all what type of oil should be used.
              -=MasterCraft All The Way=-
              sigpic
              MC X45 SS Crusader 8.1 HO 2007
              Malibu WAKESETTER VLX SS 2009 400hp
              MC X-Star MCX 2005
              Tige 20v 2004 black scorpion 6.2
              MC ProStar 190 1995 275hp

              Comment


              • #8
                Yep I have to agree with gear oil statement!!!! Yes the trailer manual actually recommends 80-90 weight gear oil. Super that I posted this thread before performing the service, so thanks guys

                I drive to the parts store and get myself some gear oil. Still it is quite confusing that the wheel hubs say 50W and the owners manual says 80-90W
                -=MasterCraft All The Way=-
                sigpic
                MC X45 SS Crusader 8.1 HO 2007
                Malibu WAKESETTER VLX SS 2009 400hp
                MC X-Star MCX 2005
                Tige 20v 2004 black scorpion 6.2
                MC ProStar 190 1995 275hp

                Comment


                • #9
                  90 weight seems to make the most sense, just like the oil in your trucks rear differential. I assume you drain out the old by jacking up the trailer and rotating the plug so it faces down to drain. Then rotate again to fill.
                  I was njskier on here.

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                  • #10
                    I came across this conflict of info between the 2005 owners manual and what the hub says too. However, when I drained my hubs for the first time I smelled the oil and it definitely didn't have a 80-90 gear oil smell - that hypoid oil really has a distinct odor to it. I'm positive it was motor oil. What weight I'm not sure, but I went ahead and put 50W motor oil in (because that's what it said on the hub cap).

                    I towed it about a 1,000 miles last season without issue. I'm sure the 80-90 would work fine too though...same stuff in a rear differential and has same type of roller bearings inside, so should do the job as well.
                    2005 ProStar 197 w/1:1 MCX; Acme #843; 2007 MC ZeroFlex Tower

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                    • #11
                      Most 2 stroke oils do not have very good corrosion inhibiters in them. No 2 stroke oils have extreme pressure additives. Ep additives are in almost all of the better 75/90, 80/90 gear oils. Gear oil will make your bearings last a long time.

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