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Unread 08-18-2010, 02:03 PM
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willy willy is offline
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Join Date: Jul 2005
Location: new jersey
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Hey Ferm I talked with a good guy at the Prop Gods and after going over everything with me he is suggesting similar to you, and I ordered his suggestion as he will change it out if he is wrong for $29. He suggested i go with the Power Tech stainless three blade, 15 1/4 x 15) OFS3. He said it should get me to the upper end of my desired RPM range and should provide a great hole shot which I could use with such a heavy boat and give me a more effiicient cruise and mileage. He said I might lose a couple miles an hour top speed though which is fine with me as it is not important. The other up side is that it has great offshore performance and bite while improving manueverability.
He said the same thing about the OMC props as you are saying, that it is likely I am off by no more than 100 RPM's due to flex. He said I probably have more error in my tach than the prop is giving.
Two things of note they have found, in the four blade when you go below 17 you start getting some problems with bite in different sea conditions and they have found very few below 16 pitch that have performed well in that regard.Also diameter wise and fitting between the prop edge and the cavitation plate on the Evinrudes is important for vibration reasons so that is why he thinks it best I stay no bigger than his recommendation.
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Willy
1986 V20 Old School
1992 V20 1992 150 Yamaha
1997 HydraSport 2250 Vector
2009 17' G3 Outfitter "G Spot"
http://www.youtube.com/watch?v=TDebw...eature=related
"I won't be wronged, I won't be insulted and I won't be laid on a hand on. I don't do these things to others and I require the same from them" JW
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