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  1. I

    Mercury 150 efi

    Will start when trimmed up but dies and won’t start when down. I’ve fixed several issues that I’ve found, electrical lines, fuel lines, and one vacuum line. Seems to be pumping fuel just fine in either position. Checked spark in down position and all six plugs firing well. Any thoughts?
  2. I

    1995 Mercury 150 EFI Serial OG374208

    At my whits end with this thing. You'll quickly determine I'm no outboard mechanic, I simply own one with many problems, recently retired and can't afford to take it to get fixed. I have to read and UTube for hours just to identify parts. Problem #1 - A three-way nipple (I said three-way...
  3. I

    Loss Of Rpm At Full Throttle

    I've got the same issues, interested in responses
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