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  1. J

    Mercury 115 Optimax rough idle and surging on idle

    My Opti 115 had some water issues after a fill at a remote location.I have drained fuel system , replaced plugs and filters , checked coils and compression. Replaced fuel filter , drained VST - a little bit of water , no debris. It has new dual 12 v batteries that are fine. Fuses are fine. No...
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