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    Heat Exchanger blocked: recommendations how to flush or unclog?

    Removed the end caps and used a rod to clear the exchanger--no debris. Also was able to remove the inlet / outlet water hoses and flush--no obstructions. Since I'm testing this in my driveway with a pressurized water hose, it's hard to tell if the impeller is the issue or not. Any...
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    Heat Exchanger blocked: recommendations how to flush or unclog?

    Sorry--Mercruiser 170. The water pump impeller were replaced less than 12 months ago.
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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

    1) Good point about the carb. I know my mechanic took the carb apart and cleaned it, so not sure how a rebuild would have been any different. 2) I'll check the filters and see if they need cleaning. Don't know if there is a fuel/water separating canister filter. 3) the previous owner who used...
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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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