Bristol 400, 1950 question about a button

[Geoff Dowdle]

Roman ,
Congratulations on your purchase. What carburettors are fitted to the engine ?? Solex or SU

The Carb button is a switch to a Solenoid which activates an enrichment device incorporated with the float chamber of the front SU carburettor only .
It will only work if the ignition is on .
There is also a Mixture button which operates a pull cable to a lever on the centre SU carb .
The rear carb has no enrichment /coke device fitted.

In cold weather from a cold start you usually have to activate both buttons , if it starts without it indicates the carbs are set way too rich.

If three Solex cabs are fitted the Carb button is not used , only the Mixture cable .


Could you please advise the chassis and registered number of the 400 and post a few photos on the Forum or direct to me to update the 400 Register

Thanks
Geoff Dowdle
BOC Joint 400 Registrar