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TR2/3/3A Tr3 jets leaking on S.U.s

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sp53

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Tr3 Carburetors leaking at the jets. I was wondering if other people have totally stopped the leaks at the jets. I seem to always get this like gas moister problem right around the adjusting nut. Any comments?
 
it's probably the cork gaskets inside the jet tube housings. Over time the usage of the choke wears on these gaskets and they begin to seep.
 
Yes right Banjo. I replaced them a while back with the cork gaskets from Moss. The gaskets looked kinda cheesy. In addition, I tried the rubber O rings a while back and they leaked a little. I have just learned to accept the gas moister somewhat because I really did not have anybody to compare my experiences with, and I thought the way it is designed it might be normal for them to leak a little. Then I thought the people on the forum would probably speak up, if their carbs were totally dry at the jets. I must not be doing something right. Perhaps the brass bearing housing is sitting to low and not sealing? I saw a picture in a book where the mechanic is shimming the jet bearing with shims, but he was working a Hs6. I do not know. I guess what your saying is that the jets on yours are totally dry?

Regards George
 
When installing new jets, make sure you polish them up good (I use fine steel wool), and lightly file the edge of the hole area. This will give your seals a chance, and help your "choke" mechanism work a little more smoothly as well.
 
Aloha,

Kurtis makes a good suggestion to make sure the seals are not cut during installation or use. Additionally soak the cork jet seals in oil for about 24 hours to soften them before installation. The cork seal between the carb body and the aluminum sealing ring should also be soaked. The softening helps them form to the correct shape and in the case of the sealing ring be properly compressed. IMO new jet seals should not leak. Over time if the jet seals are allowed to dry out and the choke is used often, they will crack or break.

I have used neoprene o-rings as jet seals in the past with good results. The problem in this case is using the choke is difficult, releasing does not always return the jet to the raised position. In my warmer climate, I don't need to use the choke.

Safety Fast,
Dave
 
Everyone makes a good point here, but the crux of the matter is how to provide a good seal with a cork gasket?? and lube it enough to keep it?? Polish the jet and use some candle wax on it(like a surfboard) this lasts for sometime but nothing is forever, least of all cork!!!!
mad dog
 
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