bkahler Posted March 30, 2023 Report Posted March 30, 2023 The title says it all. Anyone know of a source for new replacement throttle shafts for the B&B carburetors? Quote
billrigsby Posted March 31, 2023 Report Posted March 31, 2023 I have seen virtually every part 'except' that for the B&B. Not sure the problem, can you re-bush the carb? Saw this on eBay sell has little to no information ?? Quote
billrigsby Posted March 31, 2023 Report Posted March 31, 2023 1 minute ago, billrigsby said: Not sure the problem, can you re-bush the carb? Just saw your second post !! Quote
desoto1939 Posted March 31, 2023 Report Posted March 31, 2023 7 hours ago, bkahler said: The title says it all. Anyone know of a source for new replacement throttle shafts for the B&B carburetors? The important thing that we all ned to know is whart BB cater carb such as E6N1. All these carb had specific mopar part numbers so at least we need to know the carb number and that is stamped on the flange on the airhorn. Rich Hartung Quote
Dave72dt Posted March 31, 2023 Report Posted March 31, 2023 2 hours ago, billrigsby said: I have seen virtually every part 'except' that for the B&B. Not sure the problem, can you re-bush the carb? Saw this on eBay sell has little to no information ?? I suspect it may be the throttle shaft that has the wear instead of the housing. Quote
Young Ed Posted March 31, 2023 Report Posted March 31, 2023 I'm not aware of new ones available other than old stock. I did buy a couple off eBay way back when. Quote
Dodgeb4ya Posted March 31, 2023 Report Posted March 31, 2023 ***Use the Carter part # to find new ones.) ***Get your favorite machinist to make one or more. ***Search for good tight used bases and throttle shaft assemblies. Last option is probsbly the easiest and best answer. Gas will sweat out around even a good tight throttle shaft when a carb has excessive fuel flooding the throttle plate when shut off. Quote
bkahler Posted March 31, 2023 Author Report Posted March 31, 2023 (edited) Sorry about the delay in responding. Got side tracked cleaning up downed tree limbs from the last storm. The Carter number is 3-449S and it doesn't show up in any searches which doesn't really surprise me. I've got 7 of these carburetors on hand and all of them have at a minimum bad shafts. The one base casting that I have dismantled might be useable and I'll know more once I get a piece of 5/16" drill rod in my hands. I should in theory have one tomorrow but more likely it will be Monday. Since I have so many base castings I will likely install bushings in a pair of them using Thermoplastic bushings from MSC. That leaves fabricating some shafts. This particular shaft has over .007" of wear in parts of the shaft. The only difficulty in fabricating replacement shafts is the arm that is peened onto the end of the shaft. I'm going to make a slight design change in this end of the shaft to facility easy installation of the arm. On my Triumph TR4 the SU Carburetor shaft has a very similar arm but instead of being peened in place the shaft is threaded on the end and a nut holds the arm in place. I'm wondering if it would be more beneficial to have the new shafts made from brass rather than steel? The machinist I talked to suggested tool steel. Ball park price for each shaft was in the neighborhood of $40 each which I don't consider bad at all. What would be ideal would be to find a CNC shop that could make a run of these shafts. Thoughts? Edited March 31, 2023 by bkahler Quote
bkahler Posted March 31, 2023 Author Report Posted March 31, 2023 19 hours ago, desoto1939 said: The important thing that we all ned to know is whart BB cater carb such as E6N1. All these carb had specific mopar part numbers so at least we need to know the carb number and that is stamped on the flange on the airhorn. Rich Hartung DTE1. Unfortunately shafts do not appear to be available aftermarket. Quote
bkahler Posted April 3, 2023 Author Report Posted April 3, 2023 I might have had a stroke of good luck over the weekend. I dismantled three of my spare carburetors and found that two of the throttle shafts were brass instead of steel. The third one is currently rusted in place. What surprised me the most was the brass shafts seem to have little if any wear. Even the throttle shaft bores in the cast iron bases seemed to be in good shape. I've placed all of the pieces in Evaporust and will be pulling them out in the next day or two to see how things really look. More to come once I get the parts out of the Evaporust. Quote
D35 Torpedo Posted April 4, 2023 Report Posted April 4, 2023 My carb is sloppy. But it runs perfect with no leaks. I just slipped a couple O-rings in, one on each side. I do it with ever carb I can and it works well. Quote
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