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  1. 03-12-2018, 02:58 PM #1
    MikeKz
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    1997 Mercury 9.9 plug gap setting

    Working on a friend's motor, s/n is 0G463144. Uses NGK BP8HS-15 plugs, can anyone tell me what to gap at?

    Thanks, Mike
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  2. Atticus9288
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    #2 03-12-2018, 04:15 PM
    1.5 mm (0.060 in.)
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  3. MikeKz
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    #3 03-12-2018, 06:44 PM
    Awesome, thanks.
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