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    Heat Exchanger blocked: recommendations how to flush or unclog?

    I replaced the heat exchanger end gasket this spring after I saw the old one had disintegrated and left small rubber pieces within the heat exchanger. I removed all the pieces I could, installed the new gasket, and everything seemed fine. I drove the boat today and noticed the engine temp was...
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    Mercruiser 170 Rough Idle on Start and High Oil Pressure

    I recently purchased an '86 Chaparral 187 with the infamous Mercruiser 170. It's been well maintained over the years and serviced it this spring with new ignition, spark plugs, gimball bearings, and water pump. I also had the carburetor cleaned and adjusted by the mechanic (but not rebuilt)...
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