 Weber mixture screws |
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| dumbjim |
 Dec 21 2020, 09:27 AM
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#1
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Newbie  Group: Members Posts: 25 Joined: 21-June 05 From: st.louis mo. Member No.: 4,312  |
Hi all, I spent yesterday fooling around with my weber idf 40's. by following mrbubbleheads instructions. With my snail, I got all four barrels pulling the same by adjusting the air bleed screws. I then moved on to the mixture screw. The mixture screws have absolutely no effect on how the engine is running. I can back them out or screw them in and there's not change in the idle. Is there something else going on here? In general, after adjusting the bleed screws, the engine is running pretty smooth. Any ideas? Thanks for reading.
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| rhodyguy |
Dec 21 2020, 10:47 AM
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#2
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Chimp Sanctuary NW. Check it out. Group: Members Posts: 22,252 Joined: 2-March 03 From: Orion's Bell. The BELL! Member No.: 378 Region Association: Galt's Gulch |
How much are the ABS backed out? CB book on pre-run setup states "Set them 1/2 turn off the bottom". So, reset. Set the idle speed screws achieving .004 clearance between the leading/forward butterfly and Venturi. Then the idle mix screws at 3 turns out from gently seated. This will more than likely result in a high idle. Don't trust your linkage. Back the pass side idle speed screw just off the stop. Now measure flow. Adj linkage as nessassary.
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Posts in this topic
dumbjim Weber mixture screws Dec 21 2020, 09:27 AM
johnhora Have these been rebuilt recently? Dec 21 2020, 10:06 AM rfinegan sounds like your idle speed is high and off the mi... Dec 21 2020, 10:15 AM
dumbjim
sounds like your idle speed is high and off the m... Dec 21 2020, 06:45 PM Charles Freeborn
sounds like your idle speed is high and off the ... Dec 22 2020, 12:29 AM Ansbacher Take it to a proper mechanic. This is above your p... Dec 22 2020, 01:07 PM Ansbacher Be careful adjusting those air bleeds to get the b... Dec 21 2020, 12:45 PM Charles Freeborn There are a LOT of factors in proper jetting, sync... Dec 21 2020, 02:19 PM 914043 I don't know if the 40 idf weber are set up th... Dec 21 2020, 09:36 PM rhodyguy I don't get the 800rpm idle thing at all. Dec 22 2020, 07:34 AM dumbjim Thanks for your comment Ansbacher. How am I gonna ... Dec 22 2020, 07:43 PM Charles Freeborn
Thanks for your comment Ansbacher. How am I gonna... Dec 23 2020, 11:22 PM IronHillRestorations I’m thinking @914043 could be on the right tra... Dec 24 2020, 07:21 AM rhodyguy One has a jam nut and one doesn't. How could t... Dec 25 2020, 09:55 AM |
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