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  #1  
Old 08-26-2014, 11:14 AM
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1 Ballast pump only works with engine running...why?

I recently noticed my port ballast pump (the one we use the most) will only run if the engine is running. The other pumps run fine if the engine is on or off. Does anyone know why?
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Old 08-26-2014, 11:19 AM
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How is the circuit wired... ? did this just start?
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Old 08-26-2014, 12:06 PM
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Now that I think about it, It seemed to start when we changed the impeller. Stock wiring and setup.
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Last edited by ap77; 08-26-2014 at 12:58 PM.
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Old 08-26-2014, 02:28 PM
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The available voltage will be lower with the engine off. You may have a motor brush going bad or a lot of extra friction in that particular pump. Try pulling out the impeller and see if it will turn on then. Spin the shaft by hand and see if it is harder to turn than your other pumps.
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