[AT] Zenith Stuck Jet Removal

[Will Powell]

I use a little heat and then get a sharp screwdriver and either tap a new slot with a hammer on the screw driver or use the edge and tap it on the edges to loosen it. 

I've removed jets from old Honda and Yamaha Motorcycle carbs. Some carbs were so bad there was no way I would ever get them out without heat. I would torch them up until the varnish started oozing out of the jet holes. It was either take a chance heating them up or just throw them out. 

----- Original Message -----
From: "charlie hill" <charliehill at embarqmail.com> 
To: "Antique tractor email discussion group" <at at lists.antique-tractor.com> 
Sent: Friday, July 27, 2012 6:00:30 AM 
Subject: Re: [AT] Zenith Stuck Jet Removal 

Dean I tried to heat a pot metal housing from a fan clutch with a propane 
torch once and determined that it can't be done! LOL. 
I was warned not to try it but didn't have anything to loose except the gas 
in the torch. 

Ben if you want to try heating it you might want to try putting it in the 
oven and heating it to 400 or 500 degs. Then stick it in the freezer or 
in a bucket of ice water or something. I'm just guessing about that. I've 
never tried it but I agree with Deans warnings. 

You could try left handed drill bits if you can find some. They might turn 
the jets out as you drill them. Of course if that doesn't work 
you are in a mess. 

Charlie 


-----Original Message----- 
From: Dean VP 
Sent: Thursday, July 26, 2012 10:17 PM 
To: 'Antique tractor email discussion group' 
Subject: Re: [AT] Zenith Stuck Jet Removal 

Ben, 

Are you sure it is aluminum rather than pot metal? The way we remove Brass 
plugs in cast 
iron carburetors is we heat the brass until it just starts to discolor. Then 
let it cool 
off. The brass will then come out very easily. Unfortunately aluminum has a 
lower melting 
point than brass so this method may not work. I don't know what the melting 
point is on 
Pot Metal either. But some method of heat application should solve your 
problem. 

Dean VP 
Snohomish, WA 

"Do not go where the path may lead; go instead where there is no path and 
leave a trail." 
- Ralph Waldo Emerson 


-----Original Message----- 
From: at-bounces at lists.antique-tractor.com 
[mailto:at-bounces at lists.antique-tractor.com] 
On Behalf Of Ben Wagner 
Sent: Thursday, July 26, 2012 6:45 PM 
To: Farmall/IHC mailing list; Antique tractor email discussion group 
Subject: [AT] Zenith Stuck Jet Removal 

Hello, 

I am in the process of rebuilding a Zenith carburetor on a Gravely L; I know 
this is a 
tractor group, but we do have Zeniths on tractors! This Zenith is nearly 
identical to the 
ones on my Farmall A's. Someone along the way attempted (vainly) to remove 
the brass 

~main jet 
~main jet passage plug 
~well vent jet 
~idle jet 

and did a terrible job of using a screwdriver. The notches are stripped! 
Furthermore, 
whoever installed them either torqued the jets or applied a sealant. I had 
enough left to 
get my screwdriver in place, but even after days of soaking in penetrating 
fluid, the 
parts will still not budge. My screwdriver doesn't have enough power, even 
clamped in a 
vise with all my weight on the turn. I don't want to damage the aluminum 
bowl, or the 
threads, so I need a way to extract these stubborn parts. 

I was able to remove the needle seat with my screw extractors since the 
notches were 
stripped on it also. However, the little jets are either too shallow for my 
extractors to 
get enough grip into the brass, or they are too small for any jet. 

Has anyone encountered a similar issue? How did you get these stubborn 
characters out? 

Thanks for your help, 
Ben Wagner 
_______________________________________________ 
AT mailing list 
http://www.antique-tractor.com/mailman/listinfo/at 


----- 
No virus found in this message. 
Checked by AVG - www.avg.com 
Version: 2012.0.2197 / Virus Database: 2437/5157 - Release Date: 07/26/12 

_______________________________________________ 
AT mailing list 
http://www.antique-tractor.com/mailman/listinfo/at 

_______________________________________________ 
AT mailing list 
http://www.antique-tractor.com/mailman/listinfo/at