engine and drivetrain Weber Dcoe Problem

[Hans]

Twin 45 DCOEs, ignition on, electric fuel pump working, fuel drips from #2 barrel venturi locking bolt on bottom of carb. So fuel is getting into the barrel. I haven tested fuel pressure yet, but float levels were adjusted recently. Needle valve?

[Rustpile]

Yup, fuel pressure, needle valve or seat. Most likely not floats.

[TobyB]

...unless the float is sinking a bit.  Then it'll do exactly what you describe.

 

Metal ones get holes in them 

 

Plastic ones are reputed to get 'absorptive'.

 

I always carried a spare for racing, as the brass ones would crack sometimes.

 

But high fuel pressure, mis- set float level,  or leaky needle seat is more likely.

 

t

[Hans]

Thanks lads. Tomorrow we investigate 

[Hans]

TobyB wins the leaky float as a prize. Fortunately a new brass float assembly was in the parts department and car runs MUCH better.