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Results 1 to 6 of 6
  1. #1

    Default Mariner 8hp 2 stroke wont run at full throttle

    My engine has had two new coils and plugs, it runs beautifully up to 60% throttle, anything over that and after 10 or 15 seconds the unit starts spluttering. New tank, fuel line and fuel. Fuel filter is clean and bowl full. She runs up to full throttle in a tank and holds it no problem, but under power after 10 seconds or so she splutters......not dies. When I return to part throttle, she's fine. Any ideas?

  2. #2
    Join Date
    May 2010
    Location
    Ottawa, Canada
    Posts
    92

    Default Re: Mariner 8hp 2 stroke wont run at full throttle

    You say the bowl is full, but did you have the carb apart, these are bad for porous floats, where the float fills with fuel.
    Regards,

    Dave Scott
    Aim Outboards and Machine
    613-831-1246

  3. #3

    Default Re: Mariner 8hp 2 stroke wont run at full throttle

    good point, carb will be off tomorrow and the float will be checked. there are two more coils under the flywheel, what's the chance these are to blame and how are they checked?

  4. #4

    Default Re: Mariner 8hp 2 stroke wont run at full throttle

    I have the same problem, what was the fix for this? Your help will much be appreciated.

  5. #5
    Join Date
    Sep 2007
    Location
    Posts
    1,068

    Default Re: Mariner 8hp 2 stroke wont run at full throttle

    Float upsidedown? Put the ridge in against the lever and set it to 1".

  6. #6
    Join Date
    Sep 2003
    Location
    New Tripoli, PA, USA!
    Posts
    12,501

    Default Re: Mariner 8hp 2 stroke wont run at full throttle

    Definitely not getting enough fuel for WOT operation. Have you tried squeezing the bulb at the same time? If that cured it, then the fuel pump is weak (or has an air leak before it). If you tried that and it made no difference, then your float system is not allowing enough fuel in.

    Jeff

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