Hi,I have a craftsman generator 4200watts,the engine start,but in a few seconds shut off, I already clean the carburator with carburator cleaner and the air filter is clean,what can i do to solve this problem? Thanks!

Possible that the engine is not getting sufficient fuel for running and so the choke action is needed. You need to check if the oil switch is cutting off the power, - if so replace oil.
Secondly the fuel settings might need a check up. You might need to clean/reset the plugs/spark gaps and also overhaul the carburator to solve this issue.

Chances are your carburator has dirt in it.
It doesn't take much to clog those little carbs.
Empty the gas tank and clean it.
Purchase a can of small engine carburator cleaner. Comes in a spray can for about $5 at Home Depot or Lowes.
Remove the carburator and disassemble it.
Soak the body in clean gasoline for about 15 minutes if you can, agitate it to help the gas disolve any clogs.
Clean the ports with the spray cleaner to blow out any debris.
Reassemble and remount the carb.
Remove, clean and gap the spark plug
Refuel the gas tank with new clean gas

Not that i am aware of, however, I suspect that as soon as you load it up it will die again as the load will call for greater speed, and too much fuel from the choke position will cause it to die again.

What I suspect is that your carburator is clogged up at the jets and is not metering the air fuel mxture properly. You may have to disassemble the carburator and clean it. Since the government has mandated that gasoline contain 10% alcohol, it has become a night mare for small engines that are not used very often. The alcohol is very hydroscopic (retains water) and during the off use period, the alcohol evaporates and leaves the water behind to mix with gunk and clog the needle valves.

Try removing the old gasoline. Refill the machine with fresh gasoline and add some "SeaFoam" (an additive) or any other brand additive that will help disolve the built up gunk in the carburator. Remove the air cleaner and try spraying a carburator cleaner down in the air intake while the machine is running, this way the air passages may clear while the new gasoline may dislodge the built up gunk. Note: The carb cleaner will stall the engine.

It is probably wise to run the gas tank dry before storage and only fill when the machine will be used. Stabil is an additive for storage, and it did it's job before the alcohol edict. I am not sure that Stabil will allow long time storage. (more than 3 months) SeaFoam can be purchased at WalMart, stabil is on the shelf of most small engine sales rooms such as Sears.

Hello. you have some gunk in the carburator. Get a can of starter fluid or carburator cleaner aerosol and a helper. Remove the air filter and start it up. Spray a little starter fluid into the air cleaner to keep it running for three or four minutes and the problem should clear. If it does not clear the carburator will have to be disassembled, cleaned and rebuilt. j.

I would check the govoner spring, maybe it is worn out or isn't on correctly.

If this isn't the case I would check the fuel air mixture screws if your carburator has them, maybe it is getting too much fuel when the throttle is turned up.

I hate to ask,is there oil in it?There's a shut off for low oil level,it's to save the engine from starving for oil.

I cleaned the carburator on mine. That did the trick. Make sure you remove the bowl from underneath and clean the bolt. The bolt has holes in it that may be clogged. Clear it with a small wire. I then sprayed the carburator down with starting fluid. You may use carburator cleaner on the carburator, but I didn't I just used a brush.

yes you can be careful and be sure the engine is not hot BUT i suspect the re may be an internal carb isue requiring a rebuild

bad fuel? or varnished inside of carburetor needs to be removed all ports and jets thoroughly cleaned out should solve your problem

pour a little raw fuel into carb intake. try to start. if engine runs for a few seconds and quits the problem is more than likely a clogged carb. go to auto store and get a gallon can of carb clreaner and dissassemble carb and lower into bucket and let soak over nite. you'll want to get a carb kit to replace any gaskets that may get messed up during tear down. when you go back together make sure to wash any residue of cleaner out of carb and use a small nozzel air blower on air hose to blow out ALL passages any needle valves have to screw into. take a can of carb cleaner and with the small straw place over hole and squirt into hole. make sure cleaner come out some where in carb body. that way you know all the passages are open. reassemble and crank her up.also invest in a compression guage. remove pllug and screw gauge into plug hole. pull sharply at least 5 times and see what the reading on the guage is. should be at least 70 or better. if rings and valves in good condition don't be surprised at a reading of 120 or better.