Miller bobcat 225 won't shut down

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I have a miller 225 and had carburetor issues so I replaced the carburator and it started running like new, but when I tried to shut my welder down it would not shut down by the switch? It is a new issue to me please advise

[cruizer]

There was a fuel shut down solinoid on the back side of the old carb, Did the new carb not have one?

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Yes there was on the old carburetor but I don't see it on the new one, I can push the gas lever further to the idle position and then it will shut down