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    1972 Mercury 650 65 hp 3 cylinder thunderbolt (Power/Throttle/Spark)

    I think you may need to adjust the barrels inside the motor for throttle. If out too far reverse revamp big time and not in forward
  2. B

    1979 Mercury 40 hp low throttle in forward gear, high throttle in reverse gear. Help

    What ever happened here? I have the same problem on a 650. Recoup in reverse only and not in forward. Has anyone attempted a counter rotating prop to fix? What else can be done?
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