Carb Adjustment Screws (1 Viewer)

[rstoddard]

Where/What are the Carb Adjustment Screws on the FJ40 Carb? Every time I go to make adjustments I spend most of the time trying to figure out what screws to adjust. The picture in the Engine FSM is mostly useless as is the same diagram in the Haynes Manual.

According to the Manual, there should be a:

Idle (Speed) Adjustment Screw
Idle Mixture Adjusting Screw
Fast Idle Adjustment Screw
Throttle Positioner Adjustment Screw

So , the Idle fMixture Screw is on the back of the Carb, alongside the Valve Cover, correct?

So I see two screws on the Firewall side, behind the Brake MC, but not necessarily exactly like the Manual diagram. The screw to the left closest to the cab body pointing straight up looks like the Idle Speed Screw. It seems to be connected to the Accelerator linkage and the fuel pump mechanisms. Does that seem correct?

That leaves the other Screw to the right closer to the Valve cover as the Fast Idle screw. Sound right?

It appears that I have a Throttle Positioner, but I don’t see any adjustment screw for it.

The Carb was rebuilt by @FJ40Jim so I know it is properly configured.

Confirmation on the Screws or any visual aids are appreciated!!

 

[Green Bean]

 

[rstoddard]

Where did you get that new linkage? That’s awesome!

 

[rstoddard]

Very helpful. It’s so hard to see these screws and easy to forget which is which.