How to find parts for Generac RV generator that was discontinued in 2012? Generator smokes. Maybe oil level too high, fuel maybe leaking into oil. How do I fix this? Tune up parts available? Hopeless?

SOURCE: Generac Guardian 17.5KW Generator dies

If this is one of the big "taco cart" portables you need to check that the vent on the gas cap is open when you're running the engine. In the center of the gage on the gas cap is a little knurled knob, turn it counter clockwise (lefty loosey), about a half turn or so and run the generator.
If that doesn't solve your problem add to it here, otherwise please give me a rating I'm trying to build a little credibility here and could use the help.
Carl

SOURCE: Have an Onan RV generator. WHat kind of oil do I

Standard 30W motor oil.

SOURCE: Homelite portable generator, LRIE4400...no out put

If the engine is running but no output from the plugs....the VERY common problem is loss of magnetism in the generator after storage.
With the generator off.........
Look at the side of the generator part.....do you see a small + and - on any terminals?
You may have to take a cover off.
Take a 9 volt battery and momentarily put current from this small battery through these terminals.
Now.....start her up and check for power at the plugs.
This fixes 75% of "no output" after being "stored" generators.

Testimonial: "you learn if you ask someone that know's...allan"

SOURCE: Honda generator ei3000. Will run only a few mins

Tank filter not blocked? (Take tap off tank) Enough oil in motor? Try overfilling it slightly

SOURCE: generac home generator does not start

is this unit diesel or gas? If its gas driven, the carburetor needs to be removed and cleaned out. Also make sure your gas is fresh. If not drain fuel tank, remove carb, clean out, re-assemble & test. Check fuel filter, oil level.