Only about 120 hrs on engine. Check Oil, Has New Fuel Filter and
Filter. Has clean Fuel. Was going to use an automtive fuel flush
canister with a mixture of carb cleaner and gasoline. Runs the
refrigerator and light fine, will not continue to run with AC or
Microwave on.

Oh my! It's nice you're trying to be helpful but you did everything but
read what Ken wrote. Another case of reading comprehension gone bad, I'm
afraid. Next time quote what the man said in your post. Then read it
again. After that compose your reply.

Here: let me show you how newsgroups work best:

Ken wrote: "Need card rebuild info for a RV QG 4000 Onan. Bogs out and
dies under a heavy load. Good fuel pressure. Starts and runs great with
a small load.

The first thing you have to do is read it very carefully. You will note
that Ken has made a confusing mistake by misspelling "carb" as "card.
And you will also note Ken did not ask a question. He simply made a
statement and provided a few facts as to how is generator runs. He's
saying he needs a carburetor rebuild for his generator and lists his
reasons why. He does not ask any question. He does not solicit any
advice. Your mish mash of suggestions is just a waste of space here.

An intelligent man would just reply saying something like this: Ken, I
do not agree that you need a carb "rebuild." The symptoms you listed
indicate a possible restricted or clogged main jet. A cleaning may be
all that carburetor needs. Carburetor rarely need to be "rebuilt." What
they need most of the time is a cleaning to remove sludge and grit and
water and other foreign matter that causes them to fail to supply the
required fuel/air mixture for the operational rpm range of the engine.

I hope this helps.

Harry Harris