I have a Suzuki gasoline generator Type SE 3000 A . It runs but give no power. No 12V or 220 V. Help

At present, the gasoline engine does not have 24 V, diesel engine has 12 V. The ignition of gasoline engines is different from that of diesel engines. Gasoline engines use spark plugs to ignite combustible mixture air to explode for work, so they do not need high speed. A low-power starter does not have to use 24Vstarter battery, while a diesel engine needs a high speed to do its work through a high-pressure spontaneous combustion explosion, such as the excessive volume of a 12V high-power motor. Therefore, the low temperature starting performance of 24V.12V diesel engine is generally used in low power diesel engine, and the application of deceleration starter solves this shortcoming.

Ryobi 5,500-Watt Gasoline Powered Portable Generator
Watts = E (voltage) * I (current) The manual will give 120 vac load limit as well as 220 volt load limit.
https://www.homedepot.com/catalog/pdfimages/39/39ebfc9d-52e6-4acb-8205-fa94c1347e04.pdf

It helps that you said it was " in storage".
I am assuming the unit runs on gasoline.
If so, it is probable the gasoline has turned to gummy deposit and the carburetor must be rebuilt.
This is common with any gasoline engine that sits for a long period of time.
I have this problem with my 2 generators.
In the future, if this was the problem, the gasoline must be drained out at the very start of the "storage" time.
God bless your efforts.

Ez test to determine if stator wiring is ok. This test works on generators that have two sets of 115v plugs and 220v plug. Use a 12v, 1amp ac power supply ( smaller ac power supply should work ok ). With generator not running, apply 12v to one of the 115v outlet plugs. Now verify 12v output voltage with meter at another 115v outlet on generator. Also verify that there is about twice the voltage at the 220 v outlet plug (should be about 20v - 24v) . If the adjoining 115 v outlet plug has no output or very little voltage or if the 220 volt plug has no output, most likely stator is damaged or breaker is off. If the stator is shorted voltage reading will be very low and power supply will heat up. If stator is open, there will be no voltage at second 115v plug or 220 v plug. If voltage is ok at the other outlet plugs as per test above then most likely problem is with voltage regulator, or brushes not making contact or armature winding open or just needs to be energized. Unplug the 12v power supply after test to prevent it from overheating. Most generators have two 115v windings that together power the 220v plug. When you energize one of the windings with the 12v power supply, the second 115v winding will be energized also and give you a voltage reading about equal to 12v. You will not damage the generator with this small voltage being input thru the plug. Good luck

When was it last given a full service?

Its run through a relay this gives a pulse 4 the pump but to b honest i cant give u more in fo not had a lot to do with them J sory cannot b more help

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.

Check the fuses or breakers to make sure they are good or in the on position

i have a tiger generator 2700, when u finish the choke it sound like it what to shootdown,what will i do

Check the voltage regulator and any fuses or breakers.