Governor problem, starts and dies

My B&S series 675 engine starts but motor won’t stay running unless I manually hold the choke open, then the RPMs are too low. There is a lever sticking up from the side of the motor opposite the carburetor. How do they interact ?

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@chfrad3rd can you post some pictures of this area with your QUESTION? That way we can see what you see. Adding images to an existing question

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