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    Power loss at full throttle HELP!!!

    I recently purchased an 1984 40E Mariner. <br />The motor starts and idles great. At 3/4 throttle it gets to 5000rpm and run good, however when I increased to full throttle is boggs down. Yesterday I took it out after cleaning the carb with some Sea Foam, it ran the same. I decide to...
  2. G

    1984 40E Mariner Studdering

    MOTOR WILL RUNS AT IDLE SPEED AND STARTS GREAT. GIVING IT MEDIUM TO FULL THROTTLE IT JUST STUDDERS. I HAVE REPLACED PLUGS, AND HAVE CLEANED THE CARB WITH SEA FOAM. <br /><br />Little history, I just acquired this boat, the prop was a 10 3/8 x 13 pitch and it was repitched to an 11, however...
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