Yes, it does have the electrical fuel shut off solenoid on the bottom - that much I remember for certain because my neighbor at first claimed it was a "fuel pump" (which of course it doesn't' need because of the gravity feed of the fuel when the fuel line is turned on).
Obviously, I would prefer not to have to buy the whole carburetor assembly to replace just the float bowl and its associated parts. However, whatever it takes to get this unit running is probably worth it. The unit only has 128 continuous hours on it and that was its one and only use during an ice storm here a couple of years ago. Prior to that and since it has been kept clean and covered with a protective tarp. So, whatever it takes, within reason, to get this unit running is probably worth it. And, of course, a used, complete working carburetor assembly would be acceptable if that is available.
I appreciate your patience in dealing with this problem and am hoping to have the answers to your previously asked questions later today, even though it appears that you have identified the engine and part(s) in question.
BTW, I replaced that generator I gave to my neighbor with a new Generac Guardian, air cooled 20KW model. I see that you have experience with those too and if I should ever have a problem with it, I'll contact you on that also. So please make sure I have your contact information when we complete this current repair project.
More later today on the Cummins Tool Corp specifications. If you already have enough information from what I've already given you, please provide me with the best avenue to fix that unit and where I can get the parts.
Best Of Regards,