As there's numerous M16 Kohlers, can you post more info, specific model, what it's on, etc?
Did the machine sit for months with fuel in it?
The couple I looked at don't have an idle "STOP SCREW", is that correct on yours?
The "mixture screw" located on the upper right hand side adjusts mixture.
To richen the mix, you open the screw CC. Turning it in till it stops LEANS out the mix, very likely
worsening the issue.
Turn it out at least one turn and see what happens. You can also remove it and shoot carb cleaned down the orifice.
You may end up doing a full carb cleaning making sure all jets are spotless and all orifices are open
as yours sounds to be running lean
post edited by SRTsFZ6 - 2023/05/10 19:44:13