Rubber impellers are used because the yare self priming by nature, and are forgiving to debris going through them like sand, and provide good output at low RPM's. There are other optons, but the rubber impeller is still the best overall option for reliability, longevity, and durability.
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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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