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Loss of RPM above 2500


Got a 1989 Carver 3207 with Dual 5.7 gas Merccruisers. Engines run fine at 2500 RPM I can run forever. Go to 2800 on the Starboard engine and RPM drop right down nothing. Gas Filter changed, no change. No real change in exhaust except it smells like it is running lean on that engine.

Seems like fuel starvation problem or by reading here also looks like it could be plugs and wires or maybe weak fuel pump. Anyone here with a similar problem on a similar vintage?

thanks

Ron

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