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    2008 8.1 Mercruiser Horizon Alarm over 3,000RPM

    Hello - Over the winter I replaced my manifolds, plugs and wires on my 08' 340DA. I launched over the weekend and it ran perfectly up until I hit 3,000RPM's and my port engine set off an alarm and RPM's immediately dropped and went crazy bouncing around between 1,000 - 2,500 RPM's. As soon as I...
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