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TR2/3/3A SU H6 Carb Leak

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lemon lover

lemon lover

Freshman Member
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I've had my tr3A running for a few years and It has had an ongoing fuel leak from the bottom of the front carburetor whenever I use the choke. I installed new leak free rubber seals from moss which helped a bit, however the leak remains so I just start it without choke. Any ideas?
 
You may need to replace some worn components like the jet or bearing
 
There are 2 possibilities.

First, there is a large packing nut, which is used to center the jet. If it is loose, fuel will seep around the packing and drip off the jet.

Second, if you are sure the packing for that nut is good and the nut is secure...then you have a defective jet. The big three were selling leaky jets about 10 years ago. The link used to pull and push the jet was drilled completely through, so the jet will leak no matter what you do.
 
Teflon o-rings from Tom Bryant in Maine fixed mine.
 
It's been a while since I've conversed with Tom but his website is current and he answers his phone. I would contact him directly.
His phone and contact info is on his website.
thosbryant.wordpress.com

SU Carburetors – Tom Bryant, Wiscasset, Maine

Posts about SU Carburetors written by Tom Bryant
thosbryant.wordpress.com thosbryant.wordpress.com
 
Plus one for teflon o-rings from Tom Bryant.

His blog posts on rebuilding SUs are excellent. After reading them I pulled mine and fixed all the mistakes I made the first time I did it (in my defense, the first time was pre-internet).
 
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