Generator running rough. Try this first. Get Seafoam "Spray". Remove fuel drain screw catch the fuel. Note where the altitude adjustment is and then turn it clockwise full open. Use the stray on can and put inside the fuel drain hole. Spray the seafoam then push stop/prime to flush it out. Spray again and then quickly put the fuel screw back in and let it soak for a few hours. Flush by pushing the stop/prime and repeat. Return altutide adjustment to origanal position. install fuel drain screw and try starting the generator. You may need to let soak overnight depending on how bad it is. Seafoam can be found at most automotive stores but make sure they have the SPRAY not the fuel additive

A look at inside and why the fuel drain screw is important when generator is not in use. Very small ports supply fuel to the carb and it's sitting in gas. Onan Operator's Manual HGJAA, HGJAB, HGJAC Page 13 4. Gasoline Models with Carburetor – Drain the carburetor float bowl (Figure 9) into a container and dispose of the fuel in accordance with local environmental regulations. Draining the float bowl prevents deposits of gum from clogging the tiny passages in the carburetor as the gasoline in the bowl evaporates during storage.

These small holes is where the gas goes from the bowl to the carb.

Fuel shut off or backfire prevention device. Make sure this shut off plunger is freely moving they can get clogged.

PLAY Video click the See Detail button Seafoam spaying into fuel drain where it goes. The altitude adjustment needle goes into a very small port by spaying the seafoam in there it will help clean it. Looking at the bowl design you should spay more than this demo shows as you want the seafoam to cover the bottom of the bowl by about 1/4"-3/8" or so to get at the fuel shutoff.

To locate the fuse carefully remove the front top cover of the HighPointe convection/microwave.  With Power off /breaker off

Remove the top two screws

Carefully pry up the three bottom tabs as shown 

pull out the cover

remove the steel grill and check fuse

On your phone. CerboGx display or VRM go to Cerbo GX remote consol and tap on Menu. If you can't find the menu try taping on the lower right conner. Menu typically appears if you tap on the bottom of the screen

Scroll down to Relay and tap