Metering needle
Jaguar: E-Type 5.3 V12 Series 3 European models to engine no. 7S8670, USA and Canada models to engine no. 7S8178
spring loaded type for Zenith Stromberg 175CD carburettors - marked: B1BH
Biased (or spring loaded) metering needles don't require time consuming adjustments to centre the needle in the jet each time they are fitted both during production and during maintenance. To some extent they self centring and all you have to do is fit them so the shoulder is flush with the bottom of the piston in the dashpot.
Please note: the needle choice will depend on range of engine modifications.
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