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6.2 Horizon MPI stumbles between 2500 and 2700 rpms-gctid814157

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    6.2 Horizon MPI stumbles between 2500 and 2700 rpms-gctid814157

    I may have jinxed my power plant last week in different thread. Any way, Last Friday, engine is warmed up, slowly bumping the throttle up to get up to cruise of 3300 rpms, she stumbles/stutters/hesitates between 2500- 2700 rpms and smooth's right out when I bump the throttle past that range. When bringing her back down off plane, it occurred again in the same range. I use non-ethanol fuel, treated with sea foam and change fuel filters regularly. This is my first MPI boat engine, so I am wondering if the issue lies in the injection system? Any thoughts greatly appreciated.
    Johnson Point, Olympia, WA
    1989 2855
    Horizon 6.2 and Bravo II

    #2
    89 2855 with a 6.2 must been repowered,

    Cool fuel module installed on this 6.2 MOI?

    Is so, there will be a fuel filter...
    Joon, Kathy, Jaden & Tristan
    Uniflite 42 AC, DD 671N
    93 3058 sold
    92 2855 (day boat)
    91 Fourwinns 205 (lake boat)
    Longbranch WA
    Life is Good

    Comment


      #3
      Good question Joon. I was heading your way when it occurred, leaving Zittel's and heading towards Devil's Head and then coming off plane at Penrose. I have a look for the cool fuel mod. It was repowered, new fuel tank and Bravo II all done in 2005.
      Johnson Point, Olympia, WA
      1989 2855
      Horizon 6.2 and Bravo II

      Comment


        #4
        Cool, I could have seen you.

        Yup if she was repowered properly, cool fuel should be there...try to identify what GEN it is.

        Great weather to be out!

        I'll out around Blake island, Seattle Bell area,

        Let me know if you are out that way...
        Joon, Kathy, Jaden & Tristan
        Uniflite 42 AC, DD 671N
        93 3058 sold
        92 2855 (day boat)
        91 Fourwinns 205 (lake boat)
        Longbranch WA
        Life is Good

        Comment

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