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    1999 7.4L MPI Inboard steaming and overheating

    "I have Twin 1999 Mercruiser 7.4L inboards one engine will start to overheat above 2500 rpm. I've installed new exhaust manifolds and elbows (no shutters) new thermostat, new raw water pump, just removed the heat exchanger end caps and the exchanger looks very clean. It doesn't overheat at...
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