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99 yamaha 15hp 4 stroke foot oil

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  • 99 yamaha 15hp 4 stroke foot oil

    The manual says to use 90wt. oil in the foot. It does not specify GL4 OR GL5. Can I use either one? If no which do I use?

  • #2
    Any 80-90weight marine gear oil will work fine. Good Luck!

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