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Thread: Yanmar 4JH DTE

  1. #1

    Default Yanmar 4JH DTE

    Hi,


    I have a yanmar 4jh dte and the problem is that when you in give it throttle there is a delay in RPM, sometimes up to 10 secs or more, the problem is worse when it is in gear. This problem has been going on daily for many years. The engine runs normally once the RPM is up. Does anyone have any idea what could be causing this?


    Thanks,
    Ross

  2. #2
    Join Date
    Nov 2008
    Location
    Long Beach, CA
    Posts
    215

    Default Re: Yanmar 4JH DTE

    How many hours? If its not in the cable then it sound like your governor/injection pump is sticking internally.

  3. #3

    Default Re: Yanmar 4JH DTE

    Quote Originally Posted by buick430 View Post
    How many hours? If its not in the cable then it sound like your governor/injection pump is sticking internally.

    It has 7945 hrs on it, have checked the cable and it seems to be ok. How would you deal with the governor/injection pump?

  4. #4
    Join Date
    Nov 2008
    Location
    Long Beach, CA
    Posts
    215

    Default Re: Yanmar 4JH DTE

    Either remove and replace with a rebuilt unit or have a reputable shop rebuild it. has the problem been getting worse? Hows your fuel quality?

    will

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