economizer jet?

[stewartr]

I'm working over a TSX-33, and it looks like it doesn't have an economizer jet. How deep is it usually? maybe It's encrusted? I can put a toothpick into the hole, and see it through the vent holes located next to the venturi.

What's the consensus on these? Should I tap it out with an 8-32 and just install one?

Thanks

 

[GB in MT.]

[b:922c684a12][i:922c684a12]
NO....do NOT use wood to trace out the orifaces for the jets. If the tip of that toothpick happens to break off, it may get stuck in there, and cost you more problems than you will want. Use small clean wires to do that!!!!!
Take a can of carb cleaner, and spray the oriface out until you can see if in fact the jet is there, or Not there. Check it with a strong light and maybe a magnifier will help ya!!
DO NOT try to tap the hole until you are sure it is not there. If you run a tap, before clearing that hole....you may just break up a jet in the hole. Then you will have ANOTHER problem, trying to get the jet out.

Make dang sure you know what is in the hole/oriface...NO jet or YES jet.!!

Gary :roll: [/i:922c684a12][/b:922c684a12]

 

[JMOR]

(quoted from post at 14:14:20 02/03/11) I'm working over a TSX-33, and it looks like it doesn't have an economizer jet. How deep is it usually? maybe It's encrusted? I can put a toothpick into the hole, and see it through the vent holes located next to the venturi.

What's the consensus on these? Should I tap it out with an 8-32 and just install one?

Thanks

ome people always say to bring any carb of the series up to the latest specification, however, the official Ford bulletin seems to say 'maybe you need it & maybe you don't'.

 

[GB in MT.]

(quoted from post at 12:35:54 02/03/11)

(quoted from post at 14:14:20 02/03/11) I'm working over a TSX-33, and it looks like it doesn't have an economizer jet. How deep is it usually? maybe It's encrusted? I can put a toothpick into the hole, and see it through the vent holes located next to the venturi.

What's the consensus on these? Should I tap it out with an 8-32 and just install one?

Thanks

ome people always say to bring any carb of the series up to the latest specification, however, the official Ford bulletin seems to say 'maybe you need it & maybe you don't'.

b:54392b93a9][i:54392b93a9]

That is very factual piece of info., BUT, knowing that he is working also on a 1940 9N engine...I did not connect that info to my reply to him.
1940 9N, using a TSX 33, leads me to believe that the economizer jet is in that carb., and if not, that jet should be installed.
A fact that he did not state in this post!!!

Gary :roll: [/i:54392b93a9][/b:54392b93a9]

 

[stewartr]

(quoted from post at 11:32:54 02/03/11) [b:dbe0f821a3][i:dbe0f821a3]
NO....do NOT use wood to trace out the orifaces for the jets. If the tip of that toothpick happens to break off, it may get stuck in there, and cost you more problems than you will want. Use small clean wires to do that!!!!!
Take a can of carb cleaner, and spray the oriface out until you can see if in fact the jet is there, or Not there. Check it with a strong light and maybe a magnifier will help ya!!
DO NOT try to tap the hole until you are sure it is not there. If you run a tap, before clearing that hole....you may just break up a jet in the hole. Then you will have ANOTHER problem, trying to get the jet out.

Make dang sure you know what is in the hole/oriface...NO jet or YES jet.!!

Gary :roll: [/i:dbe0f821a3][/b:dbe0f821a3]

I appreciate the words of wisdom! More than cleaning the jet, I was trying to figure out which holes were connected. I'll head into town today, and get some proper wire to clean the jets.

I guess what I'm trying to figure out is how deep the jet should be (if it has one). It should be between the bowl vent and the economizer vent, right?

That service letter is interesting.

 

[GB in MT.]

[b:1edaf4b419][i:1edaf4b419]
Here is a color coded pic. (Made by JMOR), that shows all the passages, and where they connect!!:

Another pic. by JMOR...shows jet locations:

Gotta go back to work on my 2N's engine overhaul!!

HTH

Gary [/i:1edaf4b419][/b:1edaf4b419]

 

[stewartr]

those are some good diagrams. I cleaned out the hole, and it definitely doesn't have an economizer jet. I guess I'll wait to tap it out, and see how it works without the economizer. If I have problems, I'll put one in.

Thanks for the help

 

[JMOR]

(quoted from post at 16:09:13 02/03/11) those are some good diagrams. I cleaned out the hole, and it definitely doesn't have an economizer jet. I guess I'll wait to tap it out, and see how it works without the economizer. If I have problems, I'll put one in.

Thanks for the help

tewart, I have a question for you. Is the path open from the hole on the underside of the carb top half all the way into the throat of the carb? In other words, in the picture, can you go in at "ECONO- IN" and exit into the throat at "ECONO - OUT"? (Third port in throat of carb).

 

[don b1]

Are you sure you have the TSX33 carb? Does it have the brass friction tab for the main fuel needle or the two holes where it would have been installed on the outside of the top half of the carb.If you do not have this feature,then I would say the top half of the carb has been replaced with a TSX241 top half that DID NOT have an ECON JET.The 9n9114 was way too small on the TSX33[about .021]Don't know for sure but I think Gary has been using the 8n9114 on the TSX33 instead of the 9n9114. don b

 

[OK8N]

I just rebuilt a TSX33 and it too does not have a jet installed in the economizer vent, nor is it threaded for one. Just made sure it was clean.
I plowed snow today and it ran fine.

 

[JMOR]

(quoted from post at 18:19:33 02/03/11) I just rebuilt a TSX33 and it too does not have a jet installed in the economizer vent, nor is it threaded for one. Just made sure it was clean.
I plowed snow today and it ran fine.

K8N, How about the "ECONO-OUT" port in the throat as as shown in my picture? Is that port in YOUR carb throat?

 

[OK8N]

The port is there but I remember it being smaller than the one pictured.

 

[JMOR]

(quoted from post at 18:51:31 02/03/11) The port is there but I remember it being smaller than the one pictured.

K8N, thanks. There was a different M/S a day or 2 ago that didn't appear to have the 3rd (ECONO) port in the throat, just the idle & transition ports. This got me to thinking about the meaning of the statement "carb has no econo jet"....could that have meant 'port & passage, just drilled through with no physical screw-in jet"...OR could that have meant that there was simply nothing there...as in no port in the throat, or a dead end passage????

 

[Billybuck]

Ford - TSX SERIES

Stewart - copy the above text in Google search and you will find a pdf of the TSX carburetors with schematics and part numbers. Hope it helps.

 

[stewartr]

There is no "economizer out" port in the throat of the carb. Boy do I feel dumb now! I guess I assumed one of the idle and transfer ports was the economizer port. Now that I've chased a wire through it, I can tell where they all connect. The bottom has a stamped TSX-33 on it, but on the top half the brass tag reads:

65 E
TSXU
829

Thanks for the photos!

 

[Gaspump]

Another Waukesha TSXU-839 universal carb shows up on an N (or at least part of it. Not the first time one was posted here.

 

[Billybuck]

JMOR - I conclude the (econojet) port is drilled with no jet and no outlet in the carb I'm sending you. Whatever is installed in the bottom of this port, appearing to be of another material, maybe brass, is identical to what appears in the bottom of the idle jet port looking down in it, with the jet removed. You'll see what I mean when you get it.

 

[stewartr]

Another Waukesha TSXU-839 universal carb shows up on an N (or at least part of it. Not the first time one was posted here.

I assume it's an aftermarket replacement? What's the significance of having it?

 

[ZANE]

The hole ABOVE the throttle plate is where the idle mixture discharges into the airstream at idle, the hole just below the throttle plate is sort of a "transfer passage" that begins to discharge fuel as the throttle opens, BEFORE the "load circuit" kicks in, to avoid "stumble" as the throttle opens.
The bowl vent is as follows:
There are 4 holes in the carb gasket, leading to 2 chambers ABOVE the gasket, left and right. From the 2 chambers ABOVE the gasket, there are 2 holes drilled into a common passage that leads to 2 holes that exit into the chamber SURROUNDING the venturi. The venturi is sealed at it's top and bottom, to the carburetor's top and bottom casting, isolating the air flow (and suction) inside the venturi from the VENT passage OUTSIDE the venturi. If the venturi is not sealing properly there will be a vacuum created in the fuel bowl and when this happens there will be equal pressure in the fuel bowl and there can be no vacuum at the venturi to draw the fuel out of the fuel bowl.
To test to assure this may be your problem you should remove the high speed needle screw completely from the carburetor. If it will run then the venturi is leaking either at the top or bottom or both.
This area SURROUNDING the venturi is open to the rectangular port in the gasket that matches up with the rectangular hole in the lower carb casting that leads to the carb inlet area, at the top of the air inlet port in the LOWER carb casting, ABOVE the choke plate area.
Also, the air for the idle circuit is sourced from that same common area surrounding the venturi.
There is a drilled passage from the vent area up to the backwards-acting idle mixture screw.
As the idle mixture screw is OPENED, it allows MORE air from the vent area to flow INTO the idle mixture, LEANING it out.

 

[JMOR]

(quoted from post at 00:10:39 02/04/11)

Another Waukesha TSXU-839 universal carb shows up on an N (or at least part of it. Not the first time one was posted here.

I assume it's an aftermarket replacement? What's the significance of having it?

ignificance is that probably some one needed a top-half of a carb & found that one which bolted up. Other 'significance ' that you may be asking about is that it does not have any economizer function whatsoever.
What does that mean you ask? Well, here is where GP is supposed to chime in, & maybe he will, but in the interim, it means that bowl pressure is not modulated in response to throttle/load conditions as it would be where economizer function is in place....perhaps a bit rich at part throttle along with a little roughness in that mid-range, but many engines are in use without this feature.