4 blade props do lose a little top end, much the same as a large diamter 3 bladed prop does. Modern 4 bladed props do alot better than old ones did. It all boils down to the boat and the application. I know my flats boat would only get to 52 with any 3 bladed prop I tried, but the 4 bladed TROPHY plus I put on it hit 61 and was still climbing when the wife smacked me and said enough(sold it before I had a chance to see just where it would top out). And most of teh time what you lose in top end with a 4 blade, you make up for with improved hole shot and mid range cruising.
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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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