I am not getting 220 volts to form the Generators

440 volts is normally 3 phase so unless you have a suitable 3 phase plug it will only be 220 volts
read your user manual carefully

this will be interesting on one switch
110 volts motor running on 220 volts will end in a flash and plenty of smoke
and a 220 volts motor running on 110 volts will over heat and smoke as well
unless you have some form of transformer to one of the motors it is a recipe for disaster
talk with an accredited electrician

the governor is not set properly, good job catching this issue. also check it under a load, if you still find the voltages too high, I recommend having it serviced.
setting the governor can be tricky.make sure you mark the shaft.

You cannot adjust the voltage output. All generators are rated for 110-125 volt recepticals and usually have at least one 220-240 volt receptical for special appliances that require it such as water heaters, pumps, welders, air conditioners. When one of these higher draw appliances is connected and they begin to draw amperage, the gas engine will automatically increase rpm to produce enough amps. If your generator gauge is showing low voltage such as 60,80 or 90volts for example, then you have overloaded the generator and blown a capacitor, resistor or similar item.

You may be asking too much of the unit; the 5800 watts a which it is spec'd, may be a 'peak' power rating which may be 15-20% higher than its continuous rating. 30 Amps at 220 volts implies 6600 watts which is higher than even the peak power rating. I would expect the unit to produce ~4800 watts continuous or around 22 Amps.
Decided to check my statements and found this, which I quote:
Generator Volts AC (60Hz) 120/240 Max. Output Current 5800W-48.3A/24.2A Rated Output Current 4800W-40A/20A Volts DC (AMPS) 12 (8.3)

Check all wiring and fuses associated with you voltage regulator if they check ok, find a way to adjust your voltage regulator replace it. Make sure the unit is running at 3600 rpm as well and making 60 hz.

Your generator is a welder?? Yikes, the 220 volts coming out of the genny is not the same as the 220 volts running a welder, it is, but it isn't, the 220 volts used to run the welder are transformed into DC, in the 50 -150 amp range, the 220 volts coming out of your genny is 220 volts, AC, at 30-40-50 amps. Now exactly how were you welding with 220 volts AC? Remove anything plugged into the genny, check the oil, check the gas, make sure it is fresh, check the breakers, check the fuses, get it running, now don't try to weld with it again. Unless you have a big welder to plug into it and I wouldn't even do that because of the generator spikes. I might be wrong, but I have never seen a genny with a welder on it for home use.

most generators have a 220 volt plug on them from the factory, if it is a small one it might not have the capabilities of 220. If it has the 220 plug then you will just need to wire the proper 220 male end onto whatever you are trying to run.

you can find it in electrical store.

You should find out which wires are you excitation fields and flash them with a 9volt battery. That should make 120 volts