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    merc 40hp no top end power

    I have a Merc Mariner 40hp 2 stroke that has no speed at full throttle. At full throttle it will only turn about 2500 rpms. Without a load (not in the water) it will rev to the limiter. My son and I suspect the CDN module is no good. The modules sparkplug has a lot of unburnt fuel on it when we...
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    '99 Mercury Tracker 40 HP

    I recently took my boat out and started across the lake pulling about 5200 rpms. Then all of a sudden it acted like it was out of fuel. It was hard to start and once running would rev to about 5000 rpm. But when you put it in gear, it would only run to about 3000 rpms. As I was trying to put it...
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