Kohler CH980 mystery. Please help!

[KE4AVB]

Bles, Just curious had the original carburetor never been worked on? Sounds like the jets were wrong but with it being a twin barrel Keilin carburetor there is no replacement jets that I know of if someone messed with them.

[BLES]

Yes, I've had the carb apart, but nothing changed or out of place. Not even dirty.
Only thing I'm not sure about is a hose that came off the top of the carb. "New" one doesn't have it. Original is spec 0016, "new" carb is off spec 2014.
BLES

[KE4AVB]

Oh well there is no way of telling what the differences, Kohler is very lipped about how they are setup.