Carb. on Model A J.D. tractor

That nozzle in simple terms is what gives the tractor a extra shot of gas when you dump the throttle fast so it does not sputter.

I always bead blast every carb, including the nozzle passage before I try to pull it through all that rust, as a common sence issue.

I think three different carbs have showed up with taps broke off inside, then I get to try to fix them. I feel selfish always wishing I got to try first before they twist off every drill plug etc. Taps are very hard steel and you have to heat them a few times to soften the tap.

Getting it out is fairly easy. Use a fine thread tap and tap the first 1/4 inch or so of the nozzle.

Now take a bolt that matches the threads you just tapped. Place a nut and a washer on the bolt, then screw the bolt into the threads of the nozzle.

Gently tighten the nut and it will pull the nozzle out.

You should clean up the entire carb, nozzle etc with a bead blaster. I'd clean up the area around the nozzle with the bead blaster before you try to pull the nozzle out. Removing all the deposits will make it pull out easier.

You will also need to clean out all the passages in the carburetor, and it will take a drill bit to do that.

If you have not cleaned one of these before I would highly recommend getting the DVD's from Roberts Carburator Repair. If you don't want to spend money on both of his DVDs, get the 2nd one.

Good Luck,
Paul