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  1. #1
    Member
    Join Date
    Jul 2004
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    Lacoochee , Florida
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    2,676

    250 Pro XS missing at 1st planing

    2B021192

    At 1st full throttle punch after start up motor misses like no fuel or cold. it stops and motor runs as it should the rest of the trip. I do have a new set of plugs that I just got and need to install is there something else I should look at?

    Rick Someillan
    Lacoochee, Florida
    2016 21 TRX
    250 Pro XS

  2. Member
    Join Date
    Jun 2013
    Location
    LONGVIEW TEXAS
    Posts
    14,092
    #2
    pumping bulb ????
    .................................................. ...the scariest thing in life is the unknown ...................................

  3. Member
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    Jul 2004
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    Lacoochee , Florida
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    2,676
    #3
    dont stay tight. i will replace that also i didnt think about that

    Rick Someillan
    Lacoochee, Florida
    2016 21 TRX
    250 Pro XS

  4. Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
    Join Date
    Apr 2008
    Location
    Greenville, SC (US)
    Posts
    95,325
    #4
    Need to be pumping bulb firm before EVERY engine start. It will not "stay tight" because once you start the engine the line and bulb are under a slight vacuum (low pressure).

    Very critical ^^^ in these temps!

    Definitely get all of your Maintenance up to date: Recommended Annual Maintenance for Optimax Engines


    Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
    Still consider myself a "Marine Apprentice" after 47 years (learn something new every day).
    Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor

  5. Member
    Join Date
    Jul 2004
    Location
    Lacoochee , Florida
    Posts
    2,676
    #5
    the ball is currently straight up and down should it be placed in another way?

    Rick Someillan
    Lacoochee, Florida
    2016 21 TRX
    250 Pro XS

  6. Member
    Join Date
    Jul 2019
    Location
    Butler Pennsylvania
    Posts
    97
    #6
    No, only pointing towards the sky, when your squeezing it.

  7. Mercury 3L/4 Stroke/Verado Moderator EuropeanAM's Avatar
    Join Date
    Apr 2008
    Location
    Greenville, SC (US)
    Posts
    95,325
    #7
    +1... arrow skyward WHILE PUMPING (orientation after that is not critical).


    Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
    Still consider myself a "Marine Apprentice" after 47 years (learn something new every day).
    Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor