Chopper 2 propeller on yamaha4/19/2023 Prop installation, inspection and boat operation all need to be done in a safe and responsible manner.The Chopper II permits higher engine mounting on the transom for greater speed. 0 hp to 250 horsepower for use with Force, Honda, Yamaha, Evinrude/Johnson and. The enhanced bow lift reduces drag, increasing the efficiency of the boat and improving overall performance. 9 HP 2 Cyl EFI 4-Stroke 20 (L) Manual Start Outboard Tiller Motor. When in doubt, dealer assistance is suggested. The new Chopper II, an improved version of the original Chopper propeller, works well on heavier boats that need bow lift. This is important in determining a suitable propeller pitch. Yamaha offers a full line of 3- and 4-blade propellers in a range of pitches that fine-tune outboard performance for just about. Wide open throttle RPM, with boat on the water in forward gear under normal loading conditions, should fall within the range that is recommended by the engine manufacturer and not exceed the recommended maximum.Engine manufacturer recommends greasing the propeller shaft every 12 months.Make sure all propeller hardware is installed correctly.
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