OK that tube that goes from the top to bottom (its what comes into play when the choke is put on) has cracked and broken in one of the crabs I am working on. Now I have other carbs that have other sheite broken on them ... whihc are ideal to yank this out and drop it on this ... any tips as to how ... anyone done it before??
Thanks.
Srinath.
I had a look at my spare set of crabs... :lol:
The tube appears to be glued in with some kind of greenish-colored adhesive. Very thin adhesive.
I'd take the whole carb body minus the rubber and plastic stuff and throw it in the oven at 500 degrees for at least an hour. Heat and time is what breaks down an adhesive. Gently pry on the tube and see if it gives. If not, stick it back in the oven for a few minutes while you round up the propane torch. Pull it out again, quickly heat up both bases where the tube goes in, and pull. Should come out.
If not drill out the thing from the inside. Make a ferrule out of 5/32" brass tube, or thereabouts depending on the final hole size. Then go to the local airport and ask them for a broken 1/8" primer line. They chafe through all the time. Chop that up, bend to shape, solder the ferrules on. Heat the carbs up in the oven again and put the primer line in the freezer. Sand on the ferrule until it *just* slides into the carbs. Repeat freezer as required. Jam that bastard in there fast before it heats up.
That would be my plan anyhow. :thumb:
Edit: Brass tube:http://www.pennvalleyhobbycenter.com/rubber/supplies/kandstubing.htm Doesn't bend very well, which is why I recommended the primer line, but good for ferrules and whatnot.
OK that I thought was smaller than 1/8th ... I'll check tonight ... heck if 1/8th will slip over ... I may have enough sticking out of the body to slide the 1/8th on and fit the longer end in at the other side ... Then maybe epoxy it all in. Heating the carb body in an oven is out ... but I was gonna heat just that area with a blow torch ... and pry it gently ... and repeat till it works ...
Cool.
Srinath.
Tube OD is .120"
If the ferrules aren't damaged, get yourself a piece of primer line and drill out the old piece with a #31 drill bit (drilled holes are always slightly oversize). Bend up a section of tube and glue it in there with epoxy or something. Might have to take a couple thou off the primer line with some 220 sandpaper to get a good fit. :thumb:
OK that will work better than yanking it off some other carbs and breaking them ...
Cool.
Srinath.
Yeah. Primer line is .125 OD (1/8"), so pretty close to exact fit. If the local airport doesn't have any f'ed up primer lines, you can order some new stuff here:
http://www.wicksaircraft.com/catalog/product_cat.php/subid=1840/index.html
I broke one the tubes and used JB Weld to fix it. No problems.
Quote from: dgyverI broke one the tubes and used JB Weld to fix it. No problems.
There was one set of carbs I got to re jet that were JB welded ... I gingerly cleaned its inside (lucky it was rather clean by itself) and rejetted it and sent it back ... with a not to the owner saying its JB welded ... but this is just a sahge off the body and I doubt JB weld will work, and I have had nothing but disasters with it, and if some comes loose and gets into the fuel or air stream at speed ... got help the rider. But getting new 1/8th line sounds good to me ...
Cool.
Srinath.