Beginning in 1991, the B series engine used the Bosch P7100 in-line fuel injection pump on higher horsepower
automotive ratings. In 1994 all automotive 6B series engines will use the Bosch P-7100 in-line fuel injection pump.
The B series engine also uses the Nippondenso EP-9 with RSV governor on 250 and 300 horsepower marine
rating.
Refer to the B Series Marine Operation and Maintenance Manual, Bulletin No. 3810466, for additional information.
The fuel injection pump performs the three basic functions of:
1) Producing the high fuel pressure required for injection.
2) Metering the exact amount of fuel for each injection cycle.
3) Delivering the high pressure metered fuel to each cylinder at the precise time.
Individual plungers are used in the pumps to develop and distribute the high pressure required for injection.
A worn or damaged plunger in the pump will affect only one cylinder.
