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A simple 3B or CJ5 Solex carb question

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    Posted: 22 Aug. 2021 at 3:13pm
For those of you that are running the Solex carb on your F head engine like this, I have a simple question for you that I'd like to double check.  In the picture I have posted, is the carb on full choke or no choke at all?  There's no butterfly that opens or closes.

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47 CJ2A 141681 Grn
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Rus Curtis Quote  Post ReplyReply Direct Link To This Post Posted: 22 Aug. 2021 at 3:51pm
At first I wanted to jump in and say the choke baffle is missing.  

Then I got out my Solex-in-a-box and noticed the only other moving part (other than the throttle) is that lever that you show (facing the valve cover).  If the cable were attached and it was pulled out, the arm would pivot to where it is now.  So I'd guess that's full choke.

This reference seems to confirm that:


Edited by Rus Curtis - 22 Aug. 2021 at 3:54pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Scratch Quote  Post ReplyReply Direct Link To This Post Posted: 22 Aug. 2021 at 5:16pm
That's what I thought...  The problem is, why does it run better with the choke lever in this position, full choke, than it does in the forward or no choke position?
43 GPW 93487 Blk
44 GPW 230283 OD
46 CJ2A 48990 Blk
46 CJ2A 77632 Wht
47 CJ2A 141681 Grn
48 CJ2A 156240 Red/Yel
48 CJ2A "Lefty" 181341 Red
61 CJ5 123120 Tan
76 CJ7 Camo
03 TJ Inca Gld
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Rus Curtis Quote  Post ReplyReply Direct Link To This Post Posted: 22 Aug. 2021 at 6:58pm
I don't know with a Solex (there's a reason mine is still in a box and I have fully rebuilt Carter) so others may need to add info.

Typically, when the choke needs to be on just to run, there's a mixture problem, i.e. too lean or idle too low.  You could scan through those Solex articles on the 3B Page and it may lead you to finding what's off with your carb.

Some info on the Solex here (with links to more info):

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Post Options Post Options   Thanks (0) Thanks(0)   Quote duffer Quote  Post ReplyReply Direct Link To This Post Posted: 26 Sep. 2021 at 12:51pm
Originally posted by Rus Curtis Rus Curtis wrote:

I don't know with a Solex (there's a reason mine is still in a box and I have fully rebuilt Carter) so others may need to add info.

Typically, when the choke needs to be on just to run, there's a mixture problem, i.e. too lean or idle too low.  You could scan through those Solex articles on the 3B Page and it may lead you to finding what's off with your carb.

Some info on the Solex here (with links to more info):


In my experience, the number one reason for that mixture problem is a vacuum leak.  Check the mounting gasket first.
1955 3B: 441sbc,AGE 4 speed transmission, Teralow D18w/Warn OD, 4.11:1 D44's/ARB's, glass tub & fenders, aluminum hood/grill, 8274, York OBA, Premier Power Welder; 67 CJ5: 225,T86AA, D18, 4.88's, OD
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