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Thread: Yamaha 50 hp lower unit?/oil?

  1. #1
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    Apr 2006
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    Default Yamaha 50 hp lower unit?/oil?

    I have a 2001 Yamaha 50T 4 stroke,I am wanting to pull the lower unit off.Any tips on pulling it?
    And
    What oil should I run?Synthetic?

    Thanks

  2. #2
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    Mar 2009
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    Petersburg, Ak
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    Leave the motor in Neutral, remove all the bolts, you will have to remove the rubber plug to get the anode/fin off, then there should be another bolt under there. Once those are out the L/U slides down and off. You'll see your waterpump on top of the gearcase when its off, this is a great time to replace the impeller. Use a 90wt gearlube for that gearcase, yamalube is good stuff, just go with that.

  3. #3
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    Sep 2009
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    Anchorage
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    Do you just want to change the lower unit oil or is there another reason that you want to pull the LU off? Waterpump replacement maybe? If all you want to do is change the lower unit oil then you dont need to remove the LU..

  4. #4
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    Apr 2006
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    Thanks guys I got it removed,pretty easy.The oil was kind of milky,wanted to check the seals and change the impeller.

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