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RWD - SU Fuel line to jet

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SU Fuel line to jet 120-130 1965

I just picked up a '65 122S two weeks ago, and am having a blast working on it, which is good, since it's going to need a lot of work! I've already found Brickboard to be incredibly helpful.

Today, while I was fumbling around the carbs, I knocked one of the fuel lines out of the jets. (Dripping fuel on to the still-warm exhaust manifold. Not good.)

I imagine the fuel line is supposed to be connected solidly to the bottom of the jet assembly. I found a great post on how to attach the fuel line on the float side here:
http://www.brickboard.com/RWD/volvo/1053100/444-544/su_fuel_feed_line_problem.html

But I couldn't figure out how it's supposed to be secured on the jet side. I feel like I'm missing something obvious... I'd really appreciate it if someone could describe how the fuel line is supposed to be attached to the jet assembly.

Thanks!

 





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SU Fuel line to jet 120-130 1965

I've knocked them out before (when I first started on my vintage car), but in my experience you can reinsert them as long as the plastic part on the jet is intact
I've only broken one in the last few years and that was when I dropped the whole carb on the garage floor.

If you just knocked it out, you can just re-attach it and you should be fine.
You'll really need to have the carb off to fix it.

The plastic tube is covered by a protective spring. Slide the spring back (or remove it temporarily. There is a brass "collar" on the jet that compresses the plastic around your fuel line to make the seal. You will need to slide that off. Note which way it goes. It will be obvious when you try to reinstall it.

Look inside the fuel line connection on the jet and you should see a little brass tube. Put the brass collar over the tube and spring and slide it back towards the float bowl. then carefully insert the fuel line tube over the brass tube in the jet. push it as far as you can get it. When you have it, side the collar back over the jet tube/plastic housing and it should be secured.

If it leaks and you can't fix it (but it does not appear broken) you can seal it up with some super-glue. That's a if-it-is-not-fixed-you-will-have-to-replace" kind of situation.

Good luck, post if you still can't get it. Send us a photo if you need some more guidance.

 




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SU Fuel line to jet - RESOLVED 120-130 1965

Thanks a lot, RepairmanJack -- I reattached the feed line as you advised, and it appears to be working! The bakelite/plastic and brass fittings appeared to be in good condition - looks like the line had just worked its way out over the years.

Many thanks - probably won't be the last time you all hear from me!

-Jerry

 




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Glad To Help! 120-130 1965

Glad it worked out. Just be mindful of leakage for a bit until you are sure that it's good and secure. I've personally only had issues with the float bowl side of things not wanting to re-seal.

 




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SU Fuel line to jet 120-130 1965

Repairman,

Is one of the carbs that have been giving terrible mileage one of which you have repaired the fuel line at the jet end?

A fuel leak there will vaporize on the heat shield without trace. Try moving the jets down, as if accelerating up to speed, and watch for fuel droplets at the base of the jet. It may be that the hose only leaks when moved as the jet drops. It is a long shot but it might be something to consider.

sd

 




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SU Fuel line to jet 120-130 1965

Good guess, but not in this case. That was a reference to my experience with the HS6 carbs on my 1967 wagon

I've got several set of carbs, one had that sort problem (was not used for more than a couple days in that condition), but the original set is what I have usually used and there is no problem of that sort there. I've never messed with the seals.

I did, however, just spring for a rebuild kit that included new carb jets and will replace them just in case...

 




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SU Fuel line to jet 120-130 1965

jjai;

Welcome to the Forum!

Fuelfeed line generally gets pulled out at bowl end by inexperienced mechanix...(where there is not a lot of holding force...just enough)...it's pretty unusual to have it come apart at the jet end...

I suggest you inspect closely but I expect something has broken on the (brittle)bakelite jet to allow the fuelfeed line to become seperated...fuelfeed line from bowl to jet connection varies by vintage of jet, but in general it is a permanent connection where the line is held in place by a crimp or circumferencially swagded-on fitting...you probably need a new jet...not that big a deal or expensive.

Cheers

Refer to exploded diagram of carb at: http://www.sw-em.com/su_carbs.htm

 




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