Quote:
Originally Posted by Jetty Rocker
Sounds like you got your RPM's confused. Normally your RPM's will change @500 RPM's between prop pitches. And If the diameter is the same, you will turn @200 rpm's less changing from an alluminum to a stainless. Maybe this will help.
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The new aluminum series for the OMC engines work like stainless props do for the most part. I ran a 19 VIPIR on my bowrider which would run 47-48 loaded down and turn 5600 RPM's. I then tried one of the newer large diameter aluminums that turned 5400 RPM's and ran 45-46 MPH. The diameter as well as blade design plays a large role in propping. I would think the APOLLO 4 blade in a 16 or 18 pitch would work really well on a V-20 for lower HP numbers. A large diameter like a MIRAGE would work well too probably, but I don't think a V-20 is really heavy enough to really need a 15"-15 1/2" prop.
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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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