I would suggest draining gas put in a fresh gallon with like 3 oz of Seafoam. Turn over to get it to carb. Wait overnight and try and start. May or may not start to ungunk...i'm getting ready for PG and E power shut offs on hot windy days here in CA. Put my portable generator on my front porch...would not start. I did the above with positive results.
But taking carb off Dubby is not a difficult thing if needed. Lots of topic/discussion on this website