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  1. #1
    Join Date
    Jun 2014
    Posts
    6

    Default 04 outback ls sputters and backfires

    I am new so help me out!
    My 2004 OUTBACK LS (330 FI) has starting having an issue with running after you have ran awhile and shut off.
    I will give a scenario: Put the boat in the water, it will start up and run fine as long as you want. Turn it off and sit a little bit and when you start back up, it will crank fine but as soon as you put throttle to it, it starts sputtering and backfiring.

    Mechanic has told me that he cant get it to do this, but he is crazy. It is like the boat isnt getting fuel or something has got hot and breaking down

    its driving me crazy! Any suggestions?
    Last edited by CLAYTO; 06-05-2014 at 12:47 PM.

  2. #2
    Join Date
    May 2014
    Location
    Clermont, Fl
    Posts
    374

    Default

    this sounds like the infamous vapor lock issue.
    Ed Geary
    2009 Moomba Outback V
    Clermont, Fl

  3. #3
    Join Date
    Mar 2010
    Location
    Irondequoit Bay, NY
    Posts
    1,298

    Default

    i think mine does that too.. the vapor lock when all the heat coming off your motor, then heating up your fuel pump..throw a cold rag on it when you start and it should help bring that temp on the fuel pump back down. mine does that and of course my pump is mounted right next to the motor
    2004 Outback Blue/white w/5.7 indmar 350, Direct Drive
    Rockford fasgate cabins
    Rockford fasgate 500w amp (cabin) and a kenwood HU (kmr700u)
    Exile XM7's
    Exile Harpoon
    Exile ZLD
    Polk 10in sub (2)
    Polk P330 amp (subs)

  4. #4
    Join Date
    Jun 2014
    Posts
    6

    Default

    Thanks a bunch! I will try the rag trick! But what is the best way to prevent vapor lock?

  5. #5
    Join Date
    Feb 2010
    Location
    Hartwell Ga./Lilburn Ga.
    Posts
    100

    Default

    Run the blower.
    04 LSV

  6. #6
    Join Date
    Mar 2014
    Location
    Park City, Utah
    Posts
    250

    Default

    Take a look at this thread.

    http://www.moomba.com/msgboard/showt...ght=vapor+lock

    I'm not sure if your setup is the same, but noticed on mine a hot water line as well as oil lines were touching the fuel pump. I moved them away as suggested and didn't have an issue next time out. I have not completely tested it in a full day scenario yet though.
    2006 Mobius LSV
    2004 Stingray 190LS - Sold
    2013 RAM 2500 Diesel - Tow Rig

  7. #7
    Join Date
    Jun 2007
    Location
    Calgary Alta Canada
    Posts
    887

    Default

    I have a question regarding this issue? Is this the first tank of gas this season? I had this issue a couple seasons back and it turned out it was the gas. I drained the fuel out , added fresh gas, added a can of Seafoam, to help remove any moisture , changed the Fuel filter and problem solved. Maybe You have moisture in the gas???
    07 Outback DD

  8. #8
    Join Date
    Feb 2010
    Location
    Fayetteville, GA
    Posts
    162

    Default

    Mine does it once or twice a season, when I run it hard and forget to leave the blower on when we stop. I just get a cup of Ice water out of the cooler and pour it in the vacinity of the 2 fuel pumps and it's healed!
    FamilyMatters

    2009 Outback

  9. #9
    Join Date
    Jun 2014
    Posts
    6

    Default

    It was the 2nd tank this season and I always keep stabilizer in the fuel, hopefully to prevent moisture. At this point I am not ruling anything out. I haven't changed the fuel filter this year but will do so this weekend. I am going to take the boat for a run tomorrow and take all the advice that has been given and hopefully solve this problem!

    I will update soon!

  10. #10
    Join Date
    Aug 2008
    Location
    Hilliard, Ohio
    Posts
    475

    Default

    Don't forget to change your fuel filter also.

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