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Zenith VA26 carburettor problems
#1
Hi all, I have just now put a new choke spring on the carburettor of my Mk1 Ruby (Zeneth VA26). The choke now works well but I have a problem with the carb. When the engine has warmed up there is a big flat spot from tick over to the engine reving up so much that it cuts out unless the throttle is feathered quite a lot. I have checked the tappets, timing and points and all are correct as I believe they have to be before adjustment to the carb.  My question is what  do I adjust.
One further point to to eliminate all possibilities I have fresh petrol in the tank.

John Mason.
Would you believe it "Her who must be obeyed" refers to my Ruby as the toy.
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#2
Hi John, working on the basis that it, presumably, ran OK before you had the carb off to fit the new choke spring, I suggest that you possibly have an air leak at the carb/ manifold joint. Working on the principle of "what Have I done that could possibly bugger it up" ???
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#3
Either that or one of the jets in the bottom of the float chamber is blocked.
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#4
Again, typical of an inlet side air leak. Before looking at the more obscure things, always check the simple things first.

Steve
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#5
Thank you all will check for air leaks and blocked jets (wish I had an air line). I do however have a can of pressurised carburettor cleaner with a plastic tube extension. 

John Mason
Would you believe it "Her who must be obeyed" refers to my Ruby as the toy.
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#6
The two jets in the bottom of the float chamber are removeable - one of the screws holding it on to the carb body should have a squared end - use that to unscrew the jets.
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#7
John

I had a similar issue which I posted about here http://www.austinsevenfriends.co.uk/foru...458&page=3

My issue was the emulsion block which when lapped into the carb body cured the issue.
See this article http://www.da7c.co.uk/technical_torque_a...ettor.html

HTH

Cheers

Dave
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