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+--- Thread: Zenith 26VA jets (/showthread.php?tid=5961)
Zenith 26VA jets - Henry Harris - 16-04-2021
Yesterday morning was mis-spent trying to get a 1938 Ruby running properly.
The choke butterfly had been set by a previous owner to be open only very slightly. The engine ran wellish but had no power.
With the choke cable adjusted properly it had a gigantic flat spot and would not run.
Cleaning jets, checking for air leaks etc. made no difference.
I tried 3 different carb bodies, 4 different float chambers of the two sorts and 4 sets of 57/50 jets.
I also checked the Bosch distributor and tried a new condenser.
With every combination there was no change.
However when I tried the float bowl from a 30VM with 90 main jet and 60 compensating jet it performed perfectly.
So, at the moment it's fitted with the 90/60 jets as they are the only alternative I have to hand.
Is this problem caused by modern fuel?
Are other owners running 26VA carbs with non-standard jets?
There was recently a post with photos about which float bowl went with which carb body. I'm unable to find the photos.
https://www.austinsevenfriends.co.uk/forum/showthread.php?tid=2640&page=2&highlight=carburettor+problems
RE: Zenith 26VA jets - Bob Culver - 16-04-2021
Has the car been fitted with a 19mm venturi Austin 10 carb? Or opend out to 19mm? I guess you are beyond the stale fuel trap.