JD STX Throttle Problems

[bob]

John Deere STX38 with Yellow Deck and Kohler CV12.5. Having throttle issues. Hope I can explain this well enough Throttle is all over the place. IT starts but has a high rev and and seems to be no distance between high throttle and a low idle and then it will probably die there. Basically it will not idle up and down evenly or smoothly. I have cleaned the carb, replaced linkage for throttle/governor as someone else just had it wired up. I adjusted the governor as it did seem like that would be the issue but no difference. Need some help

[KE4AVB]

It very possible you have a failed governor or it just so far out adjustment it lost it regulating pin.

[bob]

This what I was wondering if there are problems inside but hoping not. I am not sure what you mean when you say it so far out adjustment it lost it regulating pin.

[KE4AVB]

What I was referring to is Item 16. On the Kohler it is not captive like the Briggs.

[Skywatcher]

Hi Bob

The throttle response can be quite touchy on these Kohler engines, full throttle and choke settings have to be exact as does throttle shaft to governor shaft synchronization. I pulled wrench for a JD dealer for 15 years and the update school on these machines was very particular about these settings. If you need more information, I may be able to add some pictures tomorrow (Sunday). All the best,

Sky

[bob]

Hi Skywatcher: If you can add some pictures or any more information I will take it all. Thanks

[bob]

Just to let you know Kevin you were right on. Tore Kohler down and regulating pin was just sitting in bottom. Thanks