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    Mercruiser 4.3LX/Thunderbolt IV won't advance past 2600 RPM

    My brother has a 1993 Mercruiser 4.3LX/Thunderbolt IV that will not accelerate beyond 2600 RPM and 9 mph. It ran great, and we shut it down to troll with the kicker for 6 hours and when we restarted it, we couldn't get it to run for more than 15 seconds. It bogged down and would not run. We...
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