I have a dewalt DG6000E generator how much oil and what kind should i use when i change it

The after fire solenoid helps prevent backfire when the engine is turned off. You can operate the genset without the solenoid and likely it will shut off without issue.

You can easily test by removing the solenoid plunger or the tip of the plunger and reinstall the solenoid.

Much times there is an oil level protection activated between the motor ignition.
Or the oil level is to low or its damaged (little change but ?) disconnect it only for a short test period only after controlling when there is realy enough oil insite.
tankfilter nozzle float chamber airfilter , sparkplug , ignition coil , electric field. electronic voltage regulator , a cilinder valve problem and many more . on/off switch dirth .....

Oil level switch that protects engine is activated. Check your oil level.

It's your carburetor. You'll have to clean it out, rebuild it, or buy a new one. The float pin is getting stuck so it's either the float or dirt inside. Make sure you turn the gas off after each use of your generator or it will eventually happen if there's dirt in the tank. Don't forget to change out the oil before you start it again or you'll have fireworks.

You might want to check the other cap but also verify engine is up to speed. Output power SB ~ 60 hz.

Check your oil, you have a low oil sensor on your unit and if the low oil sensor will shut the engine down,

Your butterfly is probably closing off the air flow - choke malfunction.

Try clean a clogged carburetor / gas filter!

Here is an exact link to the parts and exploded diagram you are looking for! Hope it helps!

DG6000E DeWALT Parts Diagram