Do you mean the XP13000? It has auto-idle on it.
Sounds like it's surging. You might have to bypass the fuel selector switch.
Check/change the oil yet? It has a low oil shut off sensor that could be tripping or failing.
Check your Idle Control switch and make sure it's off when you start it.
Always start with the breaker in the OFF position to prevent an accidental load.
Make sure your fuel selector is all the way to whatever you're using.
Sounds like it's surging. You might have to bypass the fuel selector switch.
Check/change the oil yet? It has a low oil shut off sensor that could be tripping or failing.
Check your Idle Control switch and make sure it's off when you start it.
Always start with the breaker in the OFF position to prevent an accidental load.
Make sure your fuel selector is all the way to whatever you're using.