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SU Carb Issue

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BritCars54

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Finally cool enough in the southwest to resume work on the 60 TR3A.
The "leak proof" o-ring on the jet assembly did not live up to its billing. As I saw on many SUs at Triumphest this past weekend, the bottom of the jet may have some moisture. Mine drip fuel, and definitely coming from the jet. So, as I pen this post, my new cork seals are soaking in oil (seems to be a consensus about this, and I did not treat the seals this way for the first attempt). As I prep to pull the jet assembly, I note that when the choke linkage is operated, the jet shafts do not slide easily. Is there something else I should be thinking about as I pull the assembly again?
 
Make sure the surface of the jet (where the seal rides) is smooth and polished. Many of the replacement jets sold today are not smooth enough.

Although polishing compound and a buff would be best, you can make an improvement with just toothpaste and your fingers. Be sure to clean thoroughly afterwards.

Also double-check that the sealing surfaces inside the two halves of the jet bearing are clean and smooth. A scratch or bit of crud can cause a leak.

If you don't know their history, it may be worth replacing the spring that fits over the jet inside the bearing. It's not unusual for people to stretch it to get extra force on the seals (trying to stop the drip), which will make the choke difficult to operate and may prevent the jet from returning after the choke is released.
 
Triumphest was a blast Jody. The TR 6 typically lives in Flagstaff from the "BEAT" until the late fall. Looking forward to getting the TR3 going well to take advantage of the driving season in the Valley.
 
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