On my Onan Generator, I had a Mud Dobber build a nest in the vent hose from my LP regulator just be for the carburator. It would fire and fart but would not run. The dealership I bought it from had installed a new LP regulator be for they found the problem. The next year I had the same problem and finally rapped a chunk of old nylon stocking on the end of the hose. No more problems with the dobbers.
GSMC(SW) U.S. Navy (RETIRED) 1967-10-03 to 1993-11-01
1995 Gulf Stream Scenic Cruiser, Cummins B5.9, Allison MD3060, Toad: 2005 Focus ZXW SES Wagon