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    Mercruiser 7.4L RPM spikes

    Hi, hoping someone has had this issue and can help. I have a '91 Maxum 2400 sport cuddy with a mercruiser 7.4L with a Bravo I drive. The other day I was cruising at approx. 30 mph and noticed the rpm's would spike up from about 3000 to 3500-3800 for a split second and then go back to 3000...
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