Generac ix 2000 how do I adjust fuel mixture

Could be a leaking exhaust valve, lean air fuel mixture, or ignition timing.

Most OHV small engines require periodic valve adjustment. Although it would be unusual for lash to decrease causing an exhaust leak, it's the first item to check.

does it start every time
check list
running hot
too much revs and load
fuel mixture too rich /lean
coil problem
burnt valve
burning oil

Rated output is at full load. Units will produce power up to that limit and use gas accordingly. Very lite load = less output and less gas consumption, etc.

Possibly blockage in fuel tank or line to carburetor? Fuel filter?
Fuel turn off valve? Generator malfunction that pulls the kill switch?
Owner's manual trouble shooting?
No manual try for owners and repair manual http://www.manualslib.com/

Change the breakers in the gen

Contact the Generac repair/service foks at:

All internal combustion engines have the same requirements. They must have the correct air fuel mixture and source of ignition in order to run. Although I am unfamiliar with the system you have, the fact thst it will start without the air filter but won't with the air filter indicates that you either have a dirty air filter (you said yours was clean) or you have too much fuel entering the combustion chamber. Beyond that I would only be guessing the reason (air fuel mixture regulator, worn jet, wrong size jet, something else bocking air flow etc.)

YOU NEED TO AJUST THE FUEL MIX ON THE CARBURTOR

It sounds as though there is an issue with the carburetor. If the unit is "surging" with no load I would recommend thoroughly cleaning the carb. It would also be a good idea to test the fuel pump. Per Generac you need to disconnect the fuel line leading to the carb and pull the starter rope over to see if adequate fuel is flowing. If none of this is the issue try testing the stepper motor on top of the carb. If you unclip the wire and use an OHM meter all wires should test at 150 ohms. to test place on test lead on the blue wire and move the other lead to the remaining four wires. The should all ohm out to roughly 150ohms. if this is not the case you need to replace the stepper motor.... Before you do any of this you should check for fresh fuel, a good spark plug, and proper compression.

what a **** generator, worked for 100 hours and now wont start anymore.
did all the checks and replacing of spark plug and oil etc, simply wont start, ****, ****, ****..... service is horrible too. they just give you the runaround.