Yes, there is, there's an upward-facing bolt with a lock nut on it on top of the governor that sets the high speed limit. Screw it "in" and forward throttle lever motion and high engine speed is limited, screw it out and the throttle lever will be able to move farther forward and engine high idle will increase.
The two levers on the governor are not directly connected, some "lost motion" between them is perfectly normal.
There's not NEARLY as much "magic" involved in basic governor action as some would like to have you believe.
The governor spring tries to pull the carburetor throttle butterfly wide open as soon as the throttle lever is advanced, centrifugal force acting on the governor weights counters that force and tries to close the butterfly. For a given throttle lever setting, the engine speed at which those two forces are equal is the speed at which the engine will run.
If the engine won't rev up at all with the advancing of the throttle lever, the spring is likely broken or disconnected, if it won't quite reach "rated speed" the spring may have stretched/weakened a bit with age, which in my experience is not as common as some others say, but possible.
Putting the spring aside, most other governor issues will either cause a slow governor response to "pick up the load" or engine "runaway" if there's a failure in the area of the weights or weight fingers, the thrust bearing and sleeve, or the "governor fork".
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Today's Featured Article - Talk of the Town: The Saga of Grandpa's Tractor - by The following saga is from the Tractor Talk Discussion Forum. Someone. The saga starts with the following message: Hey guys I have a decision to make. I know what you all will probably suggest and it will probably agree with me way down inside, but here it is. I have a picture blown up and framed in my "tractor room" of a Farmall M. It was my Grandpa's tractor, of which whom I never got to meet. He froze to death getting this tractor out of the barn to pull a truck out of the ditch before I was born. Anyway my dad and aunt had to sell it at the auction,
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