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Old 09-21-2018, 01:48 AM   #4
51 MERC-CT
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Join Date: May 2010
Location: East Hartford, Ct
Posts: 5,898
Default Re: After polarity change with 12v conversion the heater becomes an air conditioner

Have not done a thing to my original 6 volt '51 Merc heater motor.
It just runs faster on both speeds while operating on 12 volt neg. ground.
Sorta' like my original 6 volt starter motor has done for the last 25+ years while operating on 12 volts.
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