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|  What is the best size prop for a 1989 Sport 20 with 200hp blackmax merc? 
			
			I have a 14.25x19 SS now and it takes off quick and tops out at 43mph on GPS at 59K rpm.  Think of a 14.25x21 to give me a better gas mileage and more top speed to get me to my fishing holes faster. | 
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