Bad gas champion 6800 generator - Electrical Supplies

indicates a problem in the low oil warning system
it is making and breaking a circuit that is causing an irregular spark

If your voltmeter is registering the 240v prior putting in the twist-lock plug then your have a crossed wire plug or there is a problem with the load.

If not reading the correct voltage then you have problem with the generator's alternator. Example bad regulator or a shorted main winding.

This comes from gas getting from the carb when the engine is stopped. The carb will need a good cleaning. Kawasaki has vent tubes just to avoid this when air venting gets plugged. Just saying. ..

When was the last time it ran? Ethanol gas wont last but a few months before it turns to Varnish and clogs your carburetor.
Write your Congressman and tell him to get rid of the Ethanol Gas law that is up for vote again. Ethanol is killing carburetors

Probably only one of these issues to cause that. gas not turned on or flooded- ck spark plug to see if it is wet, check to see if the spark plug is getting power by taking it out leaving the wire on it and holding it about a 1/8 of a inch away from some exposed metal part of the frame and have someone try to start it. if you get a spark then ck your gap and put it back. Ck your choke too to see if it is on. also if it was flooded then leave the choke off and keep trying to start it. if it was stored outside, it may have water in the gas.

You have a carburetor problem. Stuck float or clogged filter. Gas cannot get into the carb as fast as it is used. Letting it sit for a few minutes will allow the bowl to fill.

Bad rings or cracked head

They have a website at http://www.championpowerequipment.com. Click "support" and they tell you "If you need to order a part please call our tech support line. Our professionally trained technicians will be able to assist with placing orders. Orders ship within 1 business day - orders received before 2:00 PM (PST) will be shipped same day." The number is 1-877-338-0999. They also have many service bulletins thee thay will help solve many problems.

First start small Check to see if there is any clogs in the line also check the fuel filter if the pump is broken go to google and type the model number in and that should bring up everything about that and possibly help you find parts for it