Eddie-O Posted January 12, 2023 Share Posted January 12, 2023 Does anyone know where I can get a throttle starter switch for a 1941 special with stromberg carburetor. Mine has been getting temperamental lately. Some time it’s fine then other times I have too open the hood and tap it at the carb a few times too get it too work. Any help would be appreciated thank you. Link to comment Share on other sites More sharing options...
carbking Posted January 13, 2023 Share Posted January 13, 2023 When asking a question, ALWAYS better to post too much information, than not enough. The original 1941 Buick Special used Stromberg AAV-16 7-37. This carburetor was superseded a number of times, and superseding carburetors don't all use the same starter switch. ASSUMING that you are working with the original 7-37, and check the carburetor bill-of-material, you will find Stromberg did NOT offer a complete starter switch replacement. The switch is composed of 19 parts, which were/are offered separately. Suggest you consider rebuilding your existing switch, or look for an identical used Stromberg carburetor, and hope the switch is better than yours. Jon 1 Link to comment Share on other sites More sharing options...
Kenneth Carr Posted January 13, 2023 Share Posted January 13, 2023 The throttle starter switch on my 1941 Buick had been disconnected and bypassed by installing a button on the dash. I put a multimeter on the two contacts to the switch mounted on the carburetor and tested it. There should be no continuity when the accelerator is not depressed. If you depress the accelerator (pull the linkage while under the hood or better still have someone else depress the accelerator pedal 1/2 way or farther) you should have continuity. That indicates that the switch is working and energizing the starting circuit. If this does not work then you can remove the throttle starter switch and do a good cleaning. That should fix it since gunk gets in there and can mess up a membrane and prevent piston movement too. A good discussion of this is here: Look at the response by JohnD1956 in the above discussion. I solved my bad switch easily because I had a spare NOS carburetor. I tested the switch on that carburetor and it tested good. I swapped it with the old one and it worked fine. So, if you have another carburetor you might want to test the switch on that one. The alternative, if you can't buy a good switch, is to try to clean it and then test again. Link to comment Share on other sites More sharing options...
Jolly_John Posted January 14, 2023 Share Posted January 14, 2023 (edited) I PM'ed the OP several days ago asking for a photo of the switch he needed. Thought I might have one available. Never heard back from him, but perhaps he hasn't been back on the forum since posting. John Edited January 14, 2023 by Jolly_John (see edit history) 1 1 Link to comment Share on other sites More sharing options...
Lawrence Helfand Posted January 16, 2023 Share Posted January 16, 2023 Two different switch designs were used and are interchangeable. Later switch does not use a diaphragm and works better. Looks very different with a black phenolic body. The Buick motor can idle down so low you think its died but its still running so the switch protects the flywheel/starter gear. Set up correctly it works like a charm. Link to comment Share on other sites More sharing options...
Kenneth Carr Posted January 21, 2023 Share Posted January 21, 2023 On 1/16/2023 at 1:02 PM, Lawrence Helfand said: …..Later switch does not use a diaphragm and works better. . . What year did they begin making the later switch? Do you have a photo?. Thanks! Link to comment Share on other sites More sharing options...
Century Eight Posted January 21, 2023 Share Posted January 21, 2023 (edited) The carb switch needs to be clean, usually that is the problem with it. Then it should work for years. A lot of good dashes were ruined by someone putting a button switch in a freshly drilled hole when they could have just cleaned it. It’s a good setup when working right. Also low budget left protection - who is going to figure it out if you are younger than sixty! Edited January 21, 2023 by Century Eight (see edit history) 1 Link to comment Share on other sites More sharing options...
Eddie-O Posted January 23, 2023 Author Share Posted January 23, 2023 Does anyone have a diagram of the switch? Link to comment Share on other sites More sharing options...
Kenneth Carr Posted January 30, 2023 Share Posted January 30, 2023 (edited) On 1/23/2023 at 4:01 PM, Eddie-O said: Does anyone have a diagram of the switch? Try pages 12-13 and 12-14 of the online 1942 shop manual. It is also discussed in the 1941 manual. I highly recommend that you buy a 1941 shop manual.http://buick.oldcarmanualproject.com/manuals/1942/Buick shop manual/13-Electrical System/image13.html Edited January 30, 2023 by Roadmaster71 typing errors (see edit history) Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now