1023E idle speed?
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    1023E idle speed?

    My 1023E which I purchased used with about 75 hrs on it in March seemed to me to be idling too fast. Around 1500 - 1600 rpm. So I pulled off the cowling and starting adjusting the idle speed set screw. As I started slowing it down the engine vibration got worse and worse, to the point where the whole tractor was shaking and I thought the thing was going to come loose from the engine mounts. So I put it back up to about 1300. Less than what it was but still a lot higher than I thought it should be. At that point the engine vibration is minimal. As you increase rpm to working speeds it runs smoother and smoother. The diesel in my Jeep Grand Cherokee idles at about 600 - 700 rpm. Are these Yanmar engines simply not supposed to idle that slow of is something wrong with this particular engine?
    JD 1023E w/54D MMM, H120 FEL, independent lift, JD iMatch hitch, more attachments to come...

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    It's the harmonics of a 3 cylinder diesel. I would put the idle speed back up to 15xx but that's just me.


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    From the TM:

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    vtail and Oberhaz like this.
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    Keeper of the GTT Cookies dieselshadow's Avatar
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    It's a characteristic of a smaller engine. Bigger motors spin slower, small spins faster. For example my 2720 idles at 1000 RPM while full tilt is around 2700 RPM. The 1 series has a smaller engine and runs between 1575 and 3400 RPM.

    The 1 series has a fairly prominent harmonic vibration at lower engine speeds due to the combination of the engine and drivetrain that always rotates with the engine. There's nothing you can do to change that. It's the nature of the animal.
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    Thanks for the technical info. So back to 1575 on the idle speed. I guess I was comparing it to other diesels I own or previously owned. None idled at such a high speed including the Yanmar 1500D diesel I had previously which was a two cylinder. I guess that's the difference between even and odd number of cylinders.
    JD 1023E w/54D MMM, H120 FEL, independent lift, JD iMatch hitch, more attachments to come...

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    rgd
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    I know thats what the engine is rated at...but personally, 1500+ idle rpm would drive me nuts...or nuttier I'd have to take a xanax
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    Keeper of the GTT Cookies dieselshadow's Avatar
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    Quote Originally Posted by rgd View Post
    I know thats what the engine is rated at...but personally, 1500+ idle rpm would drive me nuts...or nuttier I'd have to take a xanax
    It drove me nuts too. But it becomes normal after a while.
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    It's still strange to me also. Doesn't seem very "idle" @ 1500 rpm.
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    I think I have more of a problem with the full throttle speed than I do with the idle speed. I have had occasion to need to push the throttle speed forward a little bit to get rid of the vibrations.

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    I thought it was a bit high too until I read in the manual that's what it's supposed to be.
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