Reply To: Mercury KE7 stumped

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March 18, 2020 at 5:45 am #197635
billw
Participant

    US Member

    I would try new plugs. If that doesn’t work, take the same new plugs and close the gap down to .010 as a test. See if it runs better. The 20 cube Mercs will find virtually any reason to misfire at low speed. They just cannot take a joke. Everything must be perfect. I have found that closing the gap down below spec will tell a big story.

    Long live American manufacturing!