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Welcome JP3 Its a good group of guys. The factory manual list the maximum RPM on the 140 HP at 5600 to 6200. You are over-reving your engine @ 7000.
Figure on a 200 to 300 RPM drop per inch of pitch increase.
Johnson 4strokes are made by Suzuki and their props come in odd number pitches, Suzuki come in even numbers. They will fit either motor
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Boat Name: DOT CALM
2004 19 Bay, Johnson ( Suzuki ) 115, EZ Loader trailer with front bunk.
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