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Results 1 to 5 of 5
  1. #1

    Default mariner 150 hp dies at high speed

    dears

    I have 150 hp mariner it runs good at low speed but it will die at high speed, carb has just been rebuilt and new spark plug .

    Please help.

    regards
    sayed

  2. #2
    Join Date
    Sep 2010
    Location
    louisiana
    Posts
    76

    Default Re: mariner 150 hp dies at high speed

    First thought that comes to mind is something is causing no fuel to your motor.... Did you check for a collapsed bulb, is the tank vent clear, is your filter new? You may have some crud on the dip tube in your tank. Might be this ethanol stuff has ruined the inside of you fuel lines. Hope this helps...BF

  3. #3
    Join Date
    Aug 2006
    Location
    SW Ohio, USA
    Posts
    10,328

    Default Re: mariner 150 hp dies at high speed

    I agree w/BF...Get someone to ride in the back and squeeze the ball when it starts to sputter. If it keeps running the fuel pump may have a small hole in the diaphragm and can't keep up with the fuel demand.
    Fix minor things (replace wear items for preventative maintenance.) that cause major problems before they break.

  4. #4

    Default Re: mariner 150 hp dies at high speed

    Dears

    I oppened the engine and found one piston damaged what could be the cause.

    best regards to all.

  5. #5
    Join Date
    Aug 2006
    Location
    SW Ohio, USA
    Posts
    10,328

    Default Re: mariner 150 hp dies at high speed

    A lack of lubrication or detonation. Post some pictures.
    Fix minor things (replace wear items for preventative maintenance.) that cause major problems before they break.

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