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  1. #1
    Join Date
    Jan 2010
    Posts
    15
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    Question about yamaha engine oil

    I have a 2002 yamaha 115 hp 4 stroke engine, I have drained the old oil and installed the new filter but have just noticed the oil im replacing with is syn. 4 cycle 25 w 40 engine oil. The old oil was 10 w 30 4 stroke oil. I have used syn. oil in my cars and have very good luck with it and like it. I was wondering if there are any problems with this change? Thanks Dave

  2. #2
    Join Date
    Apr 2009
    Location
    Kings Mtn. Ky.
    Posts
    864
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    Dave

    Go to bbcboards.net ( bass boat central) & ask in the Yamaha outboards forum. They'll steer you in the right direction as there are some top outboard wrenches there.

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