Fuel Odours

[dave1850]

Hi All
When I turn off the engine on my 1850 after a short or long run, I notice a mild petrol odour around the carb area, most noticeably at the air filter intake. I took off the air cleaner and noted the air filters were quite smelly - petrol smell - but no liquid to be seen. I have checked for leaks - none - on all fuel lines. The twin SUs' float chambers are not overflowing. I have balanced the carbs and using a friend's electronic analyser adjusted the mixture. Otherwise the car is running fine and pulling well, with no problems starting.

Do you know what would be causing the odour around the filters and what I can do about it?

thank you
David

[cleverusername]

Assuming there is no leak, I suppose it could be running a bit rich. Obvious thing is sticking choke, too rich mixture, incorrect needles. Have you changed the fuel pump? I have heard of some running at too high a pressure.

Still normally it is a perished fuel line or duff float valve.

[dave1850]

Hi - thanks. I don't think it's running rich as I've had the analyser on it and adjusted the mixture. Fuel pump is one thing I haven't touched.

[MIG Wielder]

Have the vent pipes from the overflow orifices split or become detatched ? They should be quite a tight fit and drain down to open air somewhere beneath the dipstick .
Tony.