It has always been my procedure to run an engine's carb bowl out of fuel if possible, before storing for a period of time.
Motorcycles, lawnmowers, even the 440 on the Travco. (I turn the electric fuel pump off an wait the minute or two for it to die)
I was going to put a shut-off valve on the Kohler to do so, until I realized I could run the genny, pull and hold-up the priming lever on the fuel pump until it died from fuel starvation. I thought I would share this with those fellow Kohler L600/L654 owners. Don't forget to return the lever to the normal lowered position when done.
Owner of an Electronics Contract Manufacturing Company and a Renewable Energy/Energy Efficiency Company. I also provide roadside service for RVs. I am a libertarian and support the right to bear arms and support concealed carry.