Description & Operation: Distributor

B30A engines are equipped with a Bosch JFUR 6 (JFURG in 1969) distributor. These distributors have a dual diaphragm unit, however the advance side of unit is disconnected and plugged. 1972 B30E & B30F engines are equipped with a Bosch JFURX6 distributor. 1973 engines have a Bosch PFURX6 distributor. All B20B engines use Bosch JFUR 4 distributors while B20F engines use a Bosch JFUX 4 distributor. Some early B20B engines were equipped with a plastic bottle in hose between carburetor and distributor, function of this bottle is to delay retard unit for about six seconds.