Starting carburetor leaks gas

[John_G (John Gadbois)]

1964 3.4 Mk2.
Hi ,
My starting carb leaks gas from the 2 openings on either side of the covered aperture behind the metering needle.
I can see gas sitting about 3/8” below the top of those tubes.
The float needle is properly adjusted at 7/16” on the front carburetor.
The car runs great.
Any ideas why the starting carb would always drip a little?
I’ m concerned having an engine fire…!
Thanks for your help.
John G.

[Mike_Eck]

A quick search brought this up as the first hit. There are many others:

MK2 Starting carburetor flooding

Hi fellow Jag-lovers, I’m having trouble with the starting carburetor of my 3.4 mk2. The engine starts very good but when the engine gets warmer and the solenoid switches off the level of fuel in de starting carburetor rises quit quickly resulting in flooding petrol. It only drips out from the two outer pipes. I’ve already checked the float chambers. The valves are working good and everything is set as it should be. Also when the engine is running, I can switch off the petrol pump so the level…

[John_G (John Gadbois)]

Thanks Mike!
Sure enough, the answer was in one of these posts.
The vent pipe on top of the float bowl was completely clogged.
This forced gas into the starting carb as the float bowl filled up, overflowing from the outer pipes.
All good now.
Best regards.
John G.