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New guy here,
I have a 1987 IMP 20 foot open bow with a 5.7 L OMC I/O. It has a 14 1/4 x21 prop on it now and will only turn about 3700 RPM and run 35 to 40 MPH. We normaly run with 4 adults and 4 kids 3 to 9 years old on a small (930 acre) lake. Tubing and sking are our main activites. I have...
