Gaurdian 75D Generator

[Sarasota2]

I have a Gaurdian 75D Quiet generator on my 2004 Damon Ultrasport
One day it just shuts down. It will start but shuts off as soon as I release the on/off switch. Checked for fuel, inline fuel pump, bypassed the oil level sensor, water level OK, getting fuel, have not found the water level sensor.
ANY SUGGESTIONS?? Thanks

[jdc1]

99% of the time it's a carb cleaning issue. Small engine shop (lawnmower), independent motorcycle shop or, at the expensive end, an RV shop can clean it in a day turn-around.

[2oldman]

It's Guardian, and how long has gas been sitting in it?