Thread: Oil tank drain

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  1. 06-12-2019, 06:51 AM #1
    TB21
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    Oil tank drain

    2002 225 Optimax serial number OT555821.
    What keeps oil from draining from engine oil tank to boat oil tank when engine is trimmed high to trailer?
    Is there a one way check valve ?
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  2. Savage
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    #2 06-12-2019, 11:34 AM
    Yes.


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  3. TB21
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    #3 06-12-2019, 12:39 PM
    Where is it located?
    Quote Originally Posted by Savage View Post
    Yes.
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  4. EuropeanAM
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    #4 06-12-2019, 05:18 PM
    90 degree check valve inside cowling (oil supply line) AS WELL as the Crankcase Pressure Check Valve (in the stb side of crankcase, bottom cylinder).


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