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  1. #1
    Member
    Join Date
    May 2013
    Location
    South Carolina
    Posts
    138

    Low Pressure Fuel Pump

    A few years ago I replaced the low pressure pumps on my 2003 Yamaha 3.1L 200 OX with the Holley little red electric pump. Lately I have been loosing power on top end. I replaced the oxygen sensor, all filters are clean, and replaced all fuel lines. Has anyone using this pump had it to wear out. What is a better pump to replace it with. Hopefully one that is quiet.

  2. Member
    Join Date
    Sep 2014
    Location
    Dallas, TX
    Posts
    1,104
    #2
    Check your grounds on the top, rear port side of the motor. My HP pump was sporadically dropping off, and corrosion there was the cause. Also, if you didn't clean the tube that feeds the O2 sensor from the block, it can be clogged with carbon.