I want to clean out my generator that has been sitting in my garage for almost 2 years, it has gas in it and it has been fired up only once since I bought it. Can anyone help.

If it hasn't been run and it had gas in it when it was stored, chances are the carb is messed up. When gas sits for a long period of time it turns into a varnish like substance. You can take some WD-40 and spray into the air inlet with the air filter off. Set the choke on and see if it will fire. It wont run very well but it should fire. If it does rebuild the carb.

There is a carburator float valve stuck and the fuel is running out the vent. You'll need to remove the float bowl and investigate. A thorough carb cleaning would be recommended and be sure all the jets are clean as well. Good luck!

Spraying carb cleaner into the carb doesn't clear the gummed gas that is clogging the supply of gas to the carb. Remove all of the gas. Put a little fresh gas and carb cleaner (about 50/50) in the tank. Try to get that to run (spray more carb cleaner or instant start into the carb to help it start - you might have to do that a couple of times). If it does start, let it run out of gas then refill the tank. If that doesn't work remove the bowl from the carb and clean the float valve and the mixture valve.
Good luck, Al K

the worst thing for generator and compressors are to sit up. when you do sit them up put stabil in the gas. run it and then run the gas out of the carburator. now, make sure the gas in the tank is good and has no water or trash. check the fuel line that it is in good conditon and not plugged. pull the carberator and clean varnish out and clean jets. soak it over nite in varsol or parts cleaner. check to see if you have a low oil shut off. oil level must be correct. check your exhaust to make sure it isn't plugged. some have a little screen that get coated with carbon and won't let it exhaust.( fuel in, spark, exhaust out)

sitting that long gas gunked up your carb get a rebuild kit for the carb

If you could not start in spite of oil and gas change, checked gas supply, spark plug, ignition cables and coils (magnetos) and so on whitout success, then try this:
Your generator has a low oil level protection, which stops the ignition of the motor.
After "a couple of years" sitting without or with old oil, the level switch may have got lazy or stuck down.
If your oil level seems to be good, while measured, find the oil switch and try to shorten or disconnect it.
If you succeed in running the generator change or repair the oil switch.

I hope that this will be helpful, because I don't have your device in front of me, but some people rank such an answer with 2 thumbs, which means useless. Better dont rank.

Well, only 2 things, is it getting gas?? Is is getting spark?? Squirt some gas down the cylinder and see if it will fire. Yes? No? If it fires, but won't run, the carb is messed up, or the fuel is not going to the carb. Then check the spark with the plug resting on metal and connected to its wire. If you have no spark, that is what you have to chase down. Sometimes these things sit and the contacts on the alternator rust over, (iron) and don't develop any juice, they have to be cleaned, the coil could be shot. The Carb might have been cleaned, but is it clean? Those jets are finicky. And gas that sits turns into rock. Check it out. Hope this helps.

yes gas will deteriate and leave varnish deposits clogging carberator and layer in tank has yellowish color flush lines with brake cleaner and spray carb with spray carb cleaner and spray inside fuel inlet on carb let sit about 15 minutes redo and sit about 4 times clean fuel tank with brake cleaner (with tank off) until clean, refill with fresh gas and add about table spoon carb cleaner per quart of gas and let in run for awhile. when storing for any period of time add fuel stabilizer to avoid this issue in future

All generators need to be run once a month. All things from the tank to the and including the carb will get gummed up with dried out fuel. I have a whole house generator and a 5500 watt gen set on my motor home. I keep fresh fuel in the stand alone house generator in California in case of a bad earthquake. I drain the gas after every run and keep all vehicles full of fuel just in case. Run gen sets at least once a month or pay pay pay!!

The carb may need cleaned! make sure tires are not dry rotted! The seals may have dried out after a long wile but in most cases you should be alright!