Volvo PV/Duett Choke throttle linkage

A binding chokewire or a pull knob that won't hold its position turns cold starting into a nightmare – the engine runs too lean and the carburetor needs to choke correctly to run smoothly until it has warmed up. Since the carburetor type differs between the engines, the engine variant determines exactly which choke controls and wires fit, from the Carter on the B4B to the Zenith and twin-SU setups on the B16 and B18.