:bigeyes: That's what is good about this forum, always something to learn!
Wonder why Kohler wanted that? I've toyed with the idea of adding an electric fuel shut off so I don't have to worry about the needle not sealing and flooding the engine while sitting. As it is now, I have easily accessible manual fuel shutoffs on 2 magnums, 1 KT, and an Onan---yes we close them every time we are done with them.

John,
I think they used them to stop run-on after killing the ignition.
Also might be for emission reasons. :bigthink:

From what ive gathered it was to meet emissions and such. Ive mowed some lately but not really pushed it yet. I did over load the engine trying to turn speed up amd raise the deck all at once. But what i did mow was pretty tall and thick and never hit the governor on it.

John,
It does not stop the fuel into the carb like a petcock would.
It stops the flow from the float chamber to the venturi/idle system.
So no back fire into the muffler and lowers emissions.
Many engine/vehicle manufactures did that to lower the level.
As the standards got tougher, the engine design had to change.
We even gotten to the point of fuel inj on most everything.
Ya the air is cleaner,but @ what cost??
but that is for another topic @ another time.