I have a Mercury outboard, 40hp, 2 stroke serial # 0T937640,model # 1043412CD. I need a new propeller. I don't know the pitch. Please HELP! Evelyn Gillaspie

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propellor pitch deopends on the work required by the operator and is sized to mainytain the torque rpms of the engine
too course and the engine labors and too fine and it over revs
best talk with a mercury service shop and tell them exactly what you are using the boat for ( low speed trolling , fishing etc , ski-ing
high speed to get there and back) they will advise on the correct pitch to suit the requirements that suit the engine
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