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    50 hp fuel pump

    When I rebuilt my motor 1989 50 hp force model 507Y9B (large bore) They gave me a pack of four fuel pump diaphragms, do I use all four diaphragms? The old one was a lot thicker than just one of the new ones. Thanks in advance for your help.
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    50 force fouling plugs

    I am in need of some suggestions,I recently rebuilt my 50 hp force motor. All new, bore job, piston rings, bearings, all seals, gaskets,rebuilt carb, ect. and it will run with fresh plugs acts a little funny at times like it is starving for fuel one minute and the next it runns great. fish...
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    crank seals

    I am rebuilding a 1989 50 hp force Ser. #1573 Mod. #507Y9B. The lower crank seal at the drive shaft end when I disisebled the crank had the pressure or lip side towards the drive shaft. Is this corect? This side is usually towards the crank case pressure on other 2 stroke motors. The top seal is...
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