Kubota Gr 2020 Throttle Screw

[Woodsman07]

Good Morning everyone,
My grandparents recently bought a used Kubota GR 2020 and are having issues with the tractor not idling correctly. I think the previous owner might have touched this screw. The engine is a Kohler 20HP CH640. I was hoping to compare pictures with someone else's motor to make sure the screw is set correctly.

Thank you

 

[North Idaho Wolfman]

The likelihood that another mower would have the same exact setting is highly unlikely.
I would suggest you get the WSM (aka service manual) and it will tell you what to adjust to set the idle properly.

 

[whitetiger]

Good Morning everyone,
My grandparents recently bought a used Kubota GR 2020 and are having issues with the tractor not idling correctly. I think the previous owner might have touched this screw. The engine is a Kohler 20HP CH640. I was hoping to compare pictures with someone else's motor to make sure the screw is set correctly.

Thank you

I think if you watch that screw and move the throttle to FAST, you will see this screw touch and stop the increase of RPMs.

 

[lmichael]

IIRC that is not an idle screw but a throttle limit. I MAY be wrong since it's been quite awhile since I owned a Kohler engine

 

[Woodsman07]

Okay, thank you for the advice. I plan on trying to fix it this Friday. I'll let y'all know what happens.

 

[Woodsman07]

Got it fixed, whoever had this mower previously had the throttle cable in the wrong hole and adjusted the high idle and the low idle. I'm guessing they did that because they didn't realize that they put it back together wrong. Anyway, the tractor is fixed and running excellent now. I used a digital engine tachometer so that I knew the engine wasn't idling to fast and the the tractor wasn't overrevving it's self.