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  1. #1

    Default Tilt Trim oil for mercruiser 140

    My boat is a sun ray(80s) tri hull with a mercruiser 4 banger engine and alfa 1 outdrive(i think) says 140 on it!! The tilt trim is the power trim double hose. My book says it takes 5w-30 oil. Can I use 5w-30 synthetic? or even 15w-40?
    Thanks
    ps keyboard broke

  2. #2
    Fleet Admiral HT32BSX115's Avatar
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    Default Re: Tilt Trim oil for mercruiser 140

    You can actually use just about any petroleum based oil.

    I use auto trans fluid because it's red and leaks are easier to identify.


    Regards,


    Rick
    73 de Rick
    ----------------------------------------------------------------------------------
    I use xxx oil and have never had a problem........
    1987 FourWinns 211 Liberator, 7.4L- Bravo III installed by ME,
    Formerly OMG 460 King Kobra powered
    1947 Stinson 108-2 Station Wagon
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  3. #3
    Rear Admiral JustJason's Avatar
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    Default Re: Tilt Trim oil for mercruiser 140

    You need to see what color fluid is in the trim system already. If it's red then you can use Dextron ATF. If its clearish/tanish then its tilt/trim fluid.
    just because you found it that way... doesn't mean it's supposed to be that way.

    Part of diagnostics is spending time figuring out not only what the problem is, but also sorting through what it isn't.

    The older the engine is, the chances of it having more than 1 problem goes up exponentially

    Boating has always been a rich mans hobby. Buying a new boat gets cheaper every year, but the maintenance, the repairs, and the overall cost of ownership of a boat has never gotten any cheaper.

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