Predator 212 linkage problem?

Halman · Feb 22, 2026

I recently picked up a go cart for the grandkids fairly cheap. Was told it ”needed a little work” lol. I’m new to this and need help understanding these small engines. It had a broken throttle cable so I put a new one on. By the way the engine is almost brand new. Anyway, I fired it up and it idles great. The problem is it does nothing when I pull on the throttle cable. The butterfly nor the governor rod move unless I grab it and move them by hand. Please educate me on how this linkage works or what might be wrong. I tried the search but nothing really helped there.

Grizzlymi · Feb 22, 2026

Try loosing the nut that holds the throttle control. They are tight from the factory and only move by hand. It would be the nut next to where you have the cable going through.

Halman · Feb 22, 2026

No difference, it wasn’t tight. I can move the lever by hand but still no movement of the governor or the butterfly valve. Thanks for the help

Hellion · Feb 22, 2026

Both of these show enough of the factory governor linkages and the movement of the throttle assembly to determine if yours is good to go.

Halman · Feb 22, 2026

Yes sir, I have already watched both of these videos. No help for my problem. If you look at my pics, it appears mine is set up properly. There is someone wrong somewhere I’m hoping the kart pros will spot a problem. Thank you for responding!

panchothedog · Feb 23, 2026

When you pull on the cable, does the throttle mechanism move? Does the cable jamb nut pull up against the part where the cable is locked down?

Edwin Spangler · Feb 23, 2026

Check for some slack towards the pedal. It looks like its connected properly, I think?

Does the pedal actuate the throttle arm?

Is the phillips head screw tight on the cable?

ezcome-ezgo · Feb 23, 2026

What is happening at the big red arrow here when you move the throttle lever (green)?

Sparkwizard · Feb 23, 2026

There is a long spring attached to your governor arm. The spring I am talking about is not the one around the linkage rod. It is all by itself, through a hole in the arm. Where does the other end of that spring attach? When you move the green lever, above, that spring should be pulled and make the governor open the carb. From your description... it seems like that spring is not installed correctly.

Halman · Feb 23, 2026

ezcome-ezgo said:
What is happening at the big red arrow here when you move the throttle lever (green)?

View attachment 160106

Nothing, that’s the problem, trying to figure out why.

ezcome-ezgo said:
What is happening at the big red arrow here when you move the throttle lever (green)?

View attachment 160106

Nothing, that’s what I’m trying to figure out

Halman · Feb 23, 2026

Halman said:
Nothing, that’s the problem, trying to figure out why.

Nothing, that’s what I’m trying to figure out

Halman · Feb 23, 2026

Sparkwizard said:
There is a long spring attached to your governor arm. The spring I am talking about is not the one around the linkage rod. It is all by itself, through a hole in the arm. Where does the other end of that spring attach? When you move the green lever, above, that spring should be pulled and make the governor open the carb. From your description... it seems like that spring is not installed correctly.

Not understanding how that works, as the butterfly needs to be pulled in the opposite direction as the governor arm moves? The spring you are talking about is there, one end on the governor arm the other end is attached to the green lever. If this incorrect, where does it attach (both ends)

Sparkwizard · Feb 23, 2026

Halman said:
Not understanding how that works, as the butterfly needs to be pulled in the opposite direction as the governor arm moves? The spring you are talking about is there, one end on the governor arm the other end is attached to the green lever. If this incorrect, where does it attach (both ends)

That is where it should be. With the engine not running...use one finger to push the carburetor closed. Black part will touch the idle speed screw.
Now, pull the green lever. Does that apply more pressure to the finger holding the carburetor throttle closed?
With the engine not running, the CARB throttle should be held open. After it starts, the governor pulls the CARB throttle closed. Moving the green lever should pull that spring and open the carb. As RPMs increase, governor arm pulls against that spring and closes CARB throttle. Moving that spring into another hole in the governor arm will increase the amount of pressure that spring puts on the governor arm, increasing RPM slightly.

Edwin Spangler · Feb 23, 2026

Halman said:
Not understanding how that works, as the butterfly needs to be pulled in the opposite direction as the governor arm moves? The spring you are talking about is there, one end on the governor arm the other end is attached to the green lever. If this incorrect, where does it attach (both ends)

~~Vacuum pulls it the opposite way (closed valve) as soon as the engine starts running~~. -Just to add onto the above comment.

EDIT: Not sure this is the intended function or if my engine has a problem. Just wanna edit that in here ^^^

Sparkwizard · Feb 23, 2026

Edwin Spangler said:
Vacuum pulls it the opposite way (closed valve) as soon as the engine starts running. -Just to add onto the above comment.

RPM or centrifugal force generated by the weights in the governor close the throttle. Vacuum does zero.

Halman · Feb 23, 2026

Halman said:
Not understanding how that works, as the butterfly needs to be pulled in the opposite direction as the governor arm moves? The spring you are talking about is there, one end on the governor arm the other end is attached to the green lever. If this incorrect, where does it attach (both ends)

Sparkwizard said:
That is where it should be. With the engine not running...use one finger to push the carburetor closed. Black part will touch the idle speed screw.
Now, pull the green lever. Does that apply more pressure to the finger holding the carburetor throttle closed?
With the engine not running, the CARB throttle should be held open. After it starts, the governor pulls the CARB throttle closed. Moving the green lever should pull that spring and open the carb. As RPMs increase, governor arm pulls against that spring and closes CARB throttle. Moving that spring into another hole in the governor arm will increase the amount of pressure that spring puts on the governor arm, increasing RPM slightly.

I’ll try it when I get home, thanks for trying to help

Denny · Feb 23, 2026

What does the throttle pedal end of the cable look like? Pitchers please?

Grizzlymi · Feb 23, 2026

Denny said:
What does the throttle pedal end of the cable look like? Pitchers please?

Go to your local bar for some pitchers. He needs help with his linkage. :cheers2:

Denny · Feb 23, 2026

Grizzlymi said:
Go to your local bar for some pitchers. He needs help with his linkage.

Then you and Sparkwizzard should try to give him some. You need to know what the whole system looks like before you can offer advice sometimes. This is one of those times. Instead of telling him his governor ain’t hooked up right. I think he has far too much play in the throttle cable and needs to adjust it out. But it’s only a theory until I see more pitchers or a video of it being worked.

Grizzlymi · Feb 23, 2026

Yeah, more pictures of the setup would help. Pics of the pedal and connection, more of the throttle plate, etc. The more pictures the better.

Then once we help him figure it out, Denny needs a pitcher. :cheers2:

Predator 212 linkage problem?

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