cub governor will only advance halfway

The governor on my cub will only advance halfway and hold on it's own. I can move the lever all the way up, but it won't hold on the teeth and slips down. I replaced the control lever and teeth, but it is really hard to move forward. I have an H that moves free and easy through all the range of the teeth, but I don't know what to do to get this cub governor to act properly!

Do I need to do something with the governor, like take it off and fix something? If so, what am I looking for?

Any suggestions would be helpful!

There is a difference between the throttle and the governor. If the throttle is hard to advance, check for binding on the governor rockshaft. Spray will penetrant and work back and forth. If still no good, you may need to remove the rockshaft and clean it.
The governor will not advance the RPMs higher than what the throttle lever is set to. Before you take the governor apart, check for binding and lubricate the linkages.

I've had the rockshaft off and cleaned it all. When I first removed it, the little lever on the side of the governor that the governor control rod connects to was really binding, but I cleaned and lightly greased it and it moves fine when off of the tractor.

However, when I put it back on it still does what it was doing when I first bought it...If I advance the throttle lever more than halfway forward, I can feel pressure pushing it back towards me. If I move the lever all the way forward the RPM's go up and it sounds ok while running, but if I don't hold it the pressure will force the lever back below halfway. I know there is something wrong, but I don't know what! Is there something inside the governor that would cause this, or is it something outside that I haven't checked?

Thanks for your help...by the way, your suggestions for my clutch were right on. It works very well now, so thanks!

I read in your post that you replaced the lever and quadrant. Are the teeth in good shape? If you advance the lever, the teeth should hold in place, even in the farthest position. The lever does have a bit of tension against it as you are fighting the governor spring. If you advance the throttle to full, and the engine operates normally, other that the lever slipping back, then the issue is with the lever and quadrant, not the governor.
The teeth need to be crisp and defined, as well as the catch on the lever. If the teeth are rounded, or the catch on the lever has a groove worn in it, you will have a hard time getting the throttle to stay put. Take a dremel tool and reshape the teeth. If you have a welder, touch up the groove on the lever and shape back to a nice crisp point. You may also have to take a crecsent wrench and twist the lever around a bit to get the catch to properly mesh up with the teeth. I have done this a number of times with great results. You have to get in the habbit of pushing the lever out, advancing the throttle, and ensuring the teeth enguage before taking your hand off the lever. Same with pulling back, don't let it slip back to idle or you'll round off the teeth over time and have the same issue over again.
Good deal with the clutch, you are more than welcome, I'm glad it worked out.

I have a 1953 that I am just beginning to pull down and clean and it does the same thing. I have not tried to operate the throttle since I began pulling pieces off of it to see if the scraping and cleaning I've done has changed anything but initially after I got it running I could advance the throttle, running or not running, about 2/3 way to the high end and the lever would find substantial resistance and not go all the way to the end of the lever's travel. When it was running I could go as far as I could with the lever and put along and then I could force it to the next tooth, get a higher RPM, and it would "pop" back to the tooth I had it in before. I did not put a tach on it to see if the "comfortable" position was 1800 RPM or not. The situation raised a red flag to me to the extent that when I get around to the govenor I have made a mental to look it over real good to see what the problem could be. My teeth and lever are in good "sharp" condition.

I bow to superior knowledge!

I pulled the Governor lever assembly apart and although the teeth on the back panel look good, the lever itself has a groove worn in the stop where the teeth hit. I replaced the lever and it holds very well.

Thanks for the feedback Ron, glad you were able to get it worked out.