Bkpigs

Member
I need to remove a broken jet from a carburetor off an A. I tried to remove the jet and the brass sheared off flush, leaving me nothing to turn it with. Obviously the jet is rusted into the body of the carburetor. What would be your suggestions on removing this? I would try to drill it out but with the small, fine threads I am scared of ruining them. You can see the jet in the picture above.
a94784.jpg
 
First off, measure the size of the hole in the jet right down to the nitty gritty so you replace it with proper jet. That is one place an eze out does sometimes work, and you won't break it off. If that does not come out, as rusty as that is , I would soak carb in muratic acid if body is cast iron, not pot medal. That will cut the rust out of all of it. About 20 or 30 percent acid to water. There are taps available to restore damaged threads for those jets.
 
On I would say 95% of the carbs I rebuild and I have done a lot of them I NEVER even try to remove the jet because they do not come out easy and most will do just that. Sock it good use carb spray cleaner and air and wire and your stand a 95% chance it will be just fine. The wire is to poke in the holes and jets to make sure they are open. Me I use a torch tip cleaner tool instead of apiece of wire. I have seen many carbs come to me looking like that and guess what they went back on and worked just fine
 
Drill carefully using progressivly larger bits. The thread is likely a #5-40. See your local gunsmith & borrow one.
If you buy a new jet; use it to check thread sizes.
 
I have left them in there just like Old said. Just so you can blow carb clean and air thru it you should be ok.
I have soaked then in White Vinager for a day or so and they have come out. But it wasn't pretty
 
I would recommend left-handed bits if you can get them. Ace Hardware carries them, and I have also bought them on eBay.

Do the best you can at centering the bit on the jet, and slowly increase the bit size. The remains of the jet will likely unscrew when the bit is big enough. If you find you're beginning to nick the threads in the bowl, it's time to put down the drill and pick out the remains with an awl or a similar sharp-pointed tool.

Mark W. in MI
 
EVERY carb that I have had come in that some one tried to drill a jet out ended up in my junk carb box. That is why I say leave them be as long as you can blow air and carb cleaner threw them your good to go
 
I dont remove that jet just use tip cleaners for the torch and also have the drills of that jet just make sure the passage is clean no real reason to remove it. Vinegar works well removing rust takes a little time but it does work.
 
They were most likely drilled with right-handed bits. Using left-handed bits and a lot of patience, I haven't ruined a carb yet.

I agree that it's best to leave it alone if possible. Drilling is strictly a last-ditch, nothing-to-lose approach.

Mark W.in MI
 
Yes but most people who cause the carb damage do not have a clue as to what they are doing and also do not have left handed bits. The fun one is if the venture tube breaks off down at the bottom boy those are no fun to get out
 

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Back
Top