Reviving NOS Webers, Initial Settings? |
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Reviving NOS Webers, Initial Settings? |
bbrock |
Mar 20 2019, 08:55 PM
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#1
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914 Guru Group: Members Posts: 5,269 Joined: 17-February 17 From: Montana Member No.: 20,845 Region Association: Rocky Mountains |
I didn't want to hijack the other thread but have a question about my own Webers. They are Italian 40IDFs I bought in the late 80s or early 90s. Other than finger tight bolting them on to my engine to see how cool they looked, they have never been used. No fuel has touched them. I don't remember if I even opened them to set the float levels. BUT... they were stored in a humid basement for several years before I moved to a civilized climate. So, the magnesium housing is tarnished on the outside and the plating has deteriorated on a few of the levers and such. Pretty minor stuff from what I can see.
My question: is there is anything special I should do or check other than inspecting for corroded parts and normal setup as I prep these for service? |
bbrock |
Jun 19 2019, 10:18 AM
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#2
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914 Guru Group: Members Posts: 5,269 Joined: 17-February 17 From: Montana Member No.: 20,845 Region Association: Rocky Mountains |
Carbs are finally cleaned up and back together. The secret sauce was @mepstein 's magic vapor blasting. I replaced all rubber seals, gaskets, and accelerator pump diaphragm as well as replated the corroded hardware. They operate smooth and easy and I think will look great in the engine bay.
(IMG:http://www.914world.com/bbs2/uploads/post-20845-1560959943_thumb.jpg) I still need to order jets to match @72hardtop 's recommendations but wondering what initial settings are working for folks. Seems these recs vary. For example: Tomlinsons suggests setting bypass screws to 1/2 turn out from seated, idle mixtures 3 turns out, and idle speed so throttle plates have a .04 gap. Haynes suggests bypass closed, idle mixture 2 turns out, and idle speed 2 turns past contact. I know these are all approximations and either of them will probably be fine, but curious how 914 people are setting their carbs for first run. Also, I can't find much on adjustment of the accelerator pump other than they both need to pump the same. I know measuring the volume is probably best but can't find specs. One thread said to check the Haynes manual but mine says nothing on the topic. Can anyone tell me how I should set these? Thanks for all your help saving these old carbs (IMG:style_emoticons/default/beerchug.gif) Oh, I also rebuilt the stock dizzy so this is what I'll run initially. Everything I've read indicates this should work great. (IMG:http://www.914world.com/bbs2/uploads/post-20845-1558413627.jpg) |
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