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    1988 Mecruiser 3.7L 2 BBL. MERCURY 224 I L4, power loss under light to moderate load

    I am working on this motor trying to find the root cause of power loss that sometimes occurs under light to moderate load RPM for 15m or more. We are hesitant to run it at higher RPM with the problems we are seeing. The water side of the cooling system is cycling water nicely, but the coolant...
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