I wouldn't use an electric water pump for 1 simple reason, and that is electrolisis. Even in a freshwater enviroment electrolisis is an issue, and will wreak havoc with corrosion. And chances are you won't see enough HP gain going to one to justify the long term realization that electric motors tend to be short lived in a marine enviroment.
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2011 SUNDANCE B20CCR SKIFF, 2011 YAMAHA 90HP 4 STROKE, 2011 KARAVAN SINGLE AXLE ALUMINUM TRAILER, LOWRANCE ELITE-7 HDI, MINN KOTA RIPTIDE TROLLING MOTOR
2000CC HYDRA-SPORT 225+HP EVINRUDE SOLD 
AND THE PINK JEEP!!!! R.I.P.
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