Super C Governer

I can move the throttle half way on my SC and It wont do any thing then it will Grab and start governer hunting. The linkgaes are not worn. Can it be adjusted. It has a new spring in it. What could be worn. Thanks Dustin.

First, adjust the throttle linkage on the left side of the engine.
1. Disconnect the linkage at the front by removing the pin.
2. Push the throttle lever to wide open.
3. Adjust the clevis until the pin slides through easily with the linkage pulled all the way forward.
4. Replace the pin.

Try it now and see if it is better. The throttle should idle with the lever at idle. You can adjust the idle stop screw to get the speed right.

To adjust the governor, remove the nut from the bottom of the governor. Shut the engine off so you don't lose your knuckles on the spinning fan in the tight space.

Using a stubby screwdriver, turn the exposed screw:

A. counter-clockwise a quarter turn at a time if the engine responds slowly or not at all, until the engine responds properly.
B. clockwise a quarter turn at a time if the engine is hunting, until the engine responds properly.

There's a number of things that can cause that.

I've found it to be pretty common with replacement and rebuilt carbs when the arm on the throttle shaft is of a different length than the original. There should also be two springs on your governor control rod, one in front and one behind the block that connects the rod to the governor. Internally, worn, tired or broken springs can cause it. A bad thrust bearing can have the same effect.

Where you're hunting, one of the easiest things I'd check out first is the governor-to-carb link on the left side. With the motor stopped, find the rod that connects the carb to the governor and remove the pin and clevis at the front end where they attach to the governor arm. Then set your throttle lever (at the seat) fully forward. Go back to the carb and hold that rod and the governor arm both as far to the rear as they will go, without putting tension on the spring resistance you'll feel in the governor arm. Then thread that clevis (if everything is there, there'll be a jam nut up against it) whichever way it has to go so that you can get the pin back through the clevis and governor arm.

That may take care of the hunting-- if not there is another adjustment that may fix it, or you may have an internal problem in the governor.

And even if it takes care of the hunting, it may still not give you back full range on the throttle control.

There's a couple of the guys who have had some success with that by straightening and bending the control rod from the lever to the governor to change its length. I haven't had to do it, but maybe one of them will chime in with ideas in that direction.

Along with the other suggestions the input shaft coming from the throttle. Does it wobble around with the throttle unhooked as this can also make a huge difference in throttle response. i like to rebush that area and with everything else in shape have great throrrle response.

Well that fixed the hunting But how can I get back the play in the throttle. Thanks Dustin

I can't recall now who it was (Andy M and mkirsch come to mind but I couldn't hold them to it) that said they'd had some success with straightening out or modifying any bows and bends in the rod from the lever to the governor. I have my doubts but . . .

It's a pesky problem. My SuperC operates over the lower two-thirds, and my BN over the upper two-thirds, the other third in each case doing nothing. I would tend to suspect a worn thrust bearing or spring, except that both those were replaced on my tractors when I did the motor jobs on them . . . It hasn't posed a problem for the way I use my machines, so I haven't gotten further into it. It's one of those things I'll look into and try someday, just to see what it gets me.

The Super C governor spring is shorter then the one in the B, could have some effect on where the lever runs at a given speed. But then, who knows what springs may be in there by now.

A loose shaft where Gene mentioned is likely piece of the story.

DO you mean the imput shaft on the governer?

I am refering to the shaft that is integral with 46947DAX "governor speed change lever with shaft".

Gene may have been refering to 46939D the governor rockshaft bushing.