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Old 26-12-2009, 17:14   #1
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Stuck Throttle on a Yanmar 3gm30

has anyone run across a stuck trottle leaver on a yanmar 3gm30
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Old 26-12-2009, 17:42   #2
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On the engine or at the control?
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Old 26-12-2009, 17:49   #3
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on the engine cable off


first time it happened I worked it out by moving it back and forth by hand
now it need a wrench over it to move
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Old 26-12-2009, 18:57   #4
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That sounds like internal damage to the injection pump.

If you need a wrench to move it there is nothing you can do to fix it other than pull it off and send it to a diesel injection shop.

Where are you located?
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Old 26-12-2009, 19:05   #5
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I'm in rhode island. I guess that was a answer I was looking for.
so taking it off and bring it to a shop would be a valid solution?
i studied the service manual and it looks beyond my skills for repairing it because of all the tools and equipment to set one up.
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Old 26-12-2009, 19:12   #6
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Now, when you go to remove it, you will have to move the throttle lever a little bit.

There is a little recess that the linkage has to move thru. There are also what may look like gaskets...they are shims...DO NOT LOSE THEM!!!!!!!!!!!!!!!
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Old 26-12-2009, 19:20   #7
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smiling I saw that in the manual that they were shims.

Is there any timing of the pump when you put it back in?
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Old 26-12-2009, 19:46   #8
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No...that's what the shims do
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Old 27-12-2009, 04:17   #9
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thanks for your help.. I'll start look for a shop that can handle it.
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Old 27-12-2009, 13:24   #10
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...There is a little recess that the linkage has to move thru. There are also what may look like gaskets...they are shims...DO NOT LOSE THEM!!!!!!!!!!!!!!!
And do Not Fold, Staple, Spindle or Mutilate them.
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Old 28-12-2009, 07:44   #11
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I appear to have the very same problem on a Yanmar 2GM20F. Throttle lever on engine is stuck at 3000 RPM and I cannot move it, even with a wrench. There appears to be an access panel under the lever, into the throttle controls. I'm considering pulling it open to see ifthere is something jamming it internally but also afraid I may cause more harm?
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Old 28-12-2009, 08:05   #12
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The metering bar on my Volvo 2020 was stuck in the closed position after setting for 6 months without running. Fuel addatives did not help as they could not enter pump. A local diesel truck mechanic helped me remove the pump and I told him to send it out for repairs. He put the pump in solvent overnight and the next day it was fine and we reinstalled. His claim is that this is a result of the diesel available today. Local truckers are adding ATF to their fuel for lubrication. Has been trouble free since.
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Old 28-12-2009, 08:45   #13
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So it could be just all gummed up inside from poor fuel? I did just return from an extended trip which I ran the engines almost daily for months. Upon return the egines did sit for long periods (weeks) without running. I will see if I can deach the fuel pump and clean it out.
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Old 30-12-2009, 22:00   #14
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BubbaBill....How are you coming along?
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Old 04-01-2010, 15:07   #15
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On further inspection I noticed my Yanmar 2GM20F has an access panel right behind the throttel lever. I carefully opened this up and liberally sprayed JB blaster onto the mechanisms. After letting it sit for 10-15 minutes I was able to get the lever to work for and aft again. I think I fixed it, but apparently while climbing around in the engine compartment I have knocked something loose as now I am not getting power to my control panel in order to start the engine. Always something!
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