yanmar 100hp idle rpm

Discussion in 'Diesel Engines' started by tropicalbuilder, Sep 29, 2011.

  1. tropicalbuilder
    Joined: Jun 2010
    Posts: 49
    Likes: 3, Points: 0, Legacy Rep: 38
    Location: costa rica

    tropicalbuilder Junior Member

    what is the best idle rpm for a yanmar 100hp
     
    tropicalbuilder, Sep 29, 2011
    #1
  2. michael pierzga
    Joined: Dec 2008
    Posts: 4,862
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    Location: spain

    michael pierzga Senior Member

    Dont know..trial and error. Remember that when you start your engine the alternators will load up and drag your rpm down.
     
    michael pierzga, Sep 30, 2011
    #2
  3. BKay
    Joined: Jan 2011
    Posts: 34
    Likes: 12, Points: 8, Legacy Rep: 28
    Location: Reedville, VA

    BKay Junior Member

    Tropicalbuilder - I have a Yanmar 110hp 4JH4-HTE. I don't recall the number off the top of my head, but I'm going out to the boat tomorrow and I'll confirm from my notes. I had to adjust idle on my engine last year and I got the factory acceptable idle range from Mack Boring. Let me pull my notes up and I'll get you the answer as it applies to my engine.
     
    BKay, Sep 30, 2011
    #3
  4. BKay
    Joined: Jan 2011
    Posts: 34
    Likes: 12, Points: 8, Legacy Rep: 28
    Location: Reedville, VA

    BKay Junior Member

    OK, found my notes. My engine was set to idle at 800 RPM and Mack Boring said the specs allowed for plus or minus 25 RPMs. Not sure what engine you have, but that was for a 4JH4-HTE. Good luck.
     
    BKay, Sep 30, 2011
    #4
    1 person likes this.

  6. tropicalbuilder
    Joined: Jun 2010
    Posts: 49
    Likes: 3, Points: 0, Legacy Rep: 38
    Location: costa rica

    tropicalbuilder Junior Member

    4jh3-hte and the manual says the idle should be 700 +-25 ...
    but i feel that a little low, at the moment i set it on 800 and sounds good ...
    thanks
     
    tropicalbuilder, Sep 30, 2011
    #5
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