Carb help

[Derek Simmons]

Hi Richard, thanks for clarifying the model & year of your car. I believe your model has the same engine spec as my 1937 Ruby. I don't know if you have an inline paper fuel filter fitter? My suspicion is that it's tiny bits of debris getting to the needle and seating as you said you temporary cured the problem by cleaning the carb each time.  Flooding is often caused by poor needle seating because even a tiny bit of debris could cause the needle & seating to fail.  When I got my 1937 Ruby I had all sorts of problems to sort out & the carb was one so I'm offering this information in hope it might help you with your carb flooding. I undertook a fair amount of work on my Ruby's fuel system including cleaning out the petrol tank, purging the fuel lines, cleaning the fuel pump and striping down & cleaning the carb. While most debris from the 80 year old fuel tank was removed it is very difficult to ensure it was totally clear. While I had no further flooding problems, I regularly checked the fuel pump filter and found tiny bits of debris in it as the pump mesh filter still stopped them getting to the carb. I also checked the banjo filter so both became regular 'servicing points'! I've had no more flooding since but recently after discussion with a fellow A7OC member I decided to fit an inline paper fuel filter before the pump and only yesterday I checked the pump filter and found it spotless for the first time and I noticed a very fine discolour on the paper of the inline filter so it confirmed very fine bits of debris are still present in the tank and there was risk it could reach the carb at some stage! Why not try fitting an inline paper fuel filter and see if it makes any difference? They only cost around £1.50 from Euro Car Parts and are very easy to fit! One other point, my carb has the capacity well but no plug or tube in it but it runs well. The hole is as per your sketch & description to Steve. I didn't have a clue if it should have the capacity tube in it until I read the enclosed Austinsevenfriends document http://www.austinsevenfriends.com/Austin...20Carb.pdf . Scroll down to 'The slow running jet' and the next paragraph says it all! Hope you cure the flooding soon!