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    Water level going down in expansion tank

    HY GUYS I have another 170 problem! Here is the problem the coolent level in the resavior tank seems to be droping slowly down to empty in about 1 week after filling it. I checked the compresion and all cylinders are about 145 psi with no water in the oil or oil in the water. could my pro blem...
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    470 Charging Volts

    I have a 1986 mercruiser 170 with the orginal charging system in it the question is what voltage should it be charging at. My system is putting out between 14 and 16 volts. Is this ok.Thanks for any replies in advance!
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    Does anybody like the Mercruiser 170 hp

    I have a mercruiser 170 and have had a little trouble with overheating but that was due to neglect by the first owner. Is there anyone out there that likes these motors?
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    Merc 470 over heating at WOT HELP

    First off I have a 1986 Merc 470 That the temp runs at 165 % at idle as soon as I give it full throttle the temp shoots right up to over 200 % and blows its top. I have been lucky not to hurt the motor. I have replaced the impeller checked the thermastat witch was bad.It did not open, thought...
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    fuel guage and temp

    Can any one tell me if a aftermarket automotive fuel guage is the same as a marine guage. Also what is the normal water temp for a 1986 mercruiser 170 running at speed.
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    1986 merc 170

    What is everyones thought about this motor. is it any good or not.
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    oil at flame aresster

    Is it normal to have oil blowing out of the hose on the aresster. if so how much is normal. sorry I have a 1986 mercruiser 170 IO
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    OIl vapor

    I am new to the forum My question is is it normal to have oil vapor coming out of the vent tubeleading to the spark aresster if it si how much is normal. sorry I have a 1986 mercruiser 170 io
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