Hello, i have a 18hp vanguard motor model number 350477 that needs to be choked half to full to run correctly. I have cleaned the carburetor, changed the air cleaner, new fuel filter, new plugs, 91 octane gas, new oil and filter. I was going to varify the adjustment on the nikki carb but i dont see an air, idle screw or any other adjustments. It does not smoke. If it is full throttle it will surge and have no power the die. If i have the choke at a quarter it will sound like there is a crackling coming from the carb. Not a back fire. I am fairly familiar with motors but not to good with carbs. Any ideas please share

Since I fixed my lawn mower, I decided to help somebody fix their generator. I know, I'm an idiot. Honda EM 5000SX generator. Engine is Honda GX340. It would not even crank with starter fluid at first. I pulled the carburetor, rebuilt it including the main jet this time, now it runs nice and strong. Idles fine even with the autothrottle on or off. Once I plug something in, it dies. It will sputter occasionally like it is about to die, whatever I plugged in will turn off, then the idle will come back up to normal. When that happens, whatever I plugged in will turn back on, and the generator goes to killing again. Any ideas? The fuel solenoid on this generator looks pretty bad, but I couldn't tell if it was working or not. I cleaned it as good as I could but I'm not sure if that has anything to do with it.