Carbuator on Ford Jubilee

My tractor is a 1954 Ford Jubilee it runs fine but has
a small drip fuel leak on the carburetor at the
bottom where a 7/16 plug is located. What does this
plug do in my manual it shows a cut a way view of
the carburator but doesn't seem to do anything.
Would a dab of liquid Teflon fix the drip did not
touch till I get more information. Thankyou for your
help.

Travis
 
All MS carbs have a drain plug on the bottom of the carb. 7/16" doesn't seem right tho. Most of mine are 3/8" pipe plugs. Maybe a previous owner put the wrong plug in there. Turn the fuel off, remove it and see what you've got. If the wrong plug you could probably retap it for a better fit. Should be a pipe plug.
 
If its a Jubilee its probably a 1953, if it is a 1954 its probably an NAA, but it doesn't matter they are virtually the same machine. Books should be the same for both.
 
It's a 1/8" pipe plug, and they can be had with a 7/16" hex, so I'm gonna GUESS that's what the O.P. is dealing with.

A 3/8" pipe plug is WAAAAYYYY larger than that little plug!
 
It may be a 3/8 where it threads into carb I was going by wrench size that fits the hex. Sorry for any confusion so it's a just a drain if that's the case nothing to it I just wanted to make sure. Thankyou

Travis
 
That's it the hex head is 7/16 on the bottom of bowl did not mean to confuse went with wrench size not bolt size. From what I'm hearing it's a drain correct? Thankyou for your help.

Travis
 
Your right about it being a NAA and the manual covers both machines. I was looking in the manual about the plug that's leaking on the bottom of the bowl and it didn't say anything so that's the reason for my question. Thankyou

Travis
 
I just wanted to let you and say Thankyou for your help the plug at the bottom of the carburetor was a 1/8-27 tapered plug. Finally was able to get out to the tractor and remove it to get the proper size until then I was just guessing not to hot.
 
If the plug that came out is the correct 1/8 pipe plug thread
and is steel, try a brass plug of the same size.
Hardware stores carry them for ~$1

A brass plug may seal on its own.
If it doesn't you can use thread sealer but let it dry before
turning the gas on and plan on having to use that sealer and
letting it dry every time you take the plug out.

If you have the carb apart I would chase the threads with a tap.
If you aren't taking it apart I would try the brass plug in place
as long as it screws in fairly easily.
 
Thanks Royce the old tapered plug needs replacing
the threads are in good shape where it threads in
been protected rest of it looks not too hot. I may still
run a 1/8-27 tap in to be safe if able to carb. still on
tractor. Weird why the plug started leaking never
touched it till now.
Thankyou
Travis
 
put in a brass 1/8" pipe thread draincock in there.
very handy to drain the bowl, and an instant check for gas if your tractor quits unexpectedly.
best 5 bucks you'll spend on your carb.
 
I use a drain valve to test the ones I rebuild so I don't get gas
all over them. Wouldn't want this mess hanging off it when I
was using it in the woods though! :) A short petcock would work.

mvphoto28171.jpg
 
Good idea better than a just a plug easier to drain
the gas if needing to. Who would more likely to
carry a 1/8-27 drain valve napa or hardwear store?
 
(quoted from post at 00:49:30 09/25/15) Good idea better than a just a plug easier to drain
the gas if needing to. Who would more likely to
carry a 1/8-27 drain valve napa or hardwear store?

well, they are everywhere.
But in my area, an autostore will have the 1/4 and 3/8 thread ones (common for radiators and air compressors), but they never seem to have the 1/8.
Local ace hardware always has them.
(ebay is cheaper, but you have to wait.....)
 
Mine came with a radiator drain petcock and was a big help when the shut off didn't shut off tight. Just put a can under carb while parked and open drain. No chance of liquid locking engine.
 

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