governor issue

[captblue1]

I'm having an issue with the governor. This is the first time the cub has run in10 years. I rebuilt carb and replaced points, condenser and cool. it started today and the governor was hunting. I adjusted timing and restated the engine. Now I'm not sure if was the very next restart or a couple restarts later but the engine was running full rpm . The their was only half open. I did notice that the stop pin was loose. It is a philips head screw right above the crossshaft. I ran out of time so I didn't check anything. Anyone have some insight? Could the screw being loose do this or is it the gear inside? It is a12 horse engin in a 100. Thanks

[_DX3_]

The gear is inside. The stop pin does hold the gear in place. You might loosen the governor bracket and make sure the cross shaft does not spin 360 degrees. If it does the you will need a new cross shaft. This is what controls the speed. It wouldn't hurt to re adjust the governor arm anyway. Do you have the service manual for your kohler motor and service manual for you cub? If not you can find them in our Garden Tractor Library. Downloadable, or you can order a hard back version from our sponsor Binder Books located up at the top of the page.

[captblue1]

So the stop pin holds the governor gear? Is it possible that the gear isnt connected to the stop pin and fell loose inside? If the shaft spins 360, than either theshaft is broken or the tab on the shaft isnt hitting the gear? Yes i have read both manuals but there isnt a very good picture of the assembly.

[_DX3_]

[QUOTE=captblue1;82002]So the stop pin holds the governor gear? Is it possible that the gear isnt connected to the stop pin and fell loose inside? If the shaft spins 360, than either theshaft is broken or the tab on the shaft isnt hitting the gear? Yes i have read both manuals but there isnt a very good picture of the assembly.[/QUOTE

How far out was the screw? And I doubt the gear fell off, you would probably have known about it if it did.

That is correct with the cross shaft. These are actually the big problem makers for the Governor not work and letting the motor over rev and blowing. Most of the failures are the metal arm falling off. They weren't welded well enough from the factory and sometimes have a tendency to break of simply fall off of the shaft. I think I have some pictures from my recent rebuild of my 128. I'll try to post a couple so you can get a good idea of what it looks like from the inside of the engine.

[_DX3_]

As you can see, if the arm broke or fell off, nothing is controlling the gear. Dont' ask me how that screw holds the gear in, because for the life of me I can't remember but it does. lol. I hope these pics might help you in some way.


Governor Gear and cross shaft arm:


Cross Shaft:

[captblue1]

Thanks that is much clearer now. I can see the gear and shaft by removing the oil pan? Any other way to see it without removing the engine? The screw was very loose. I noticed the screw rattling around like it was almost ready to fall out.