TM 5-2420-230-24-2
B3.9 and B5.9 Series Engines
Fuel Lift Pump (005-045)
Section 5 - Fuel System - Group 05
Page 5-77
Piston-style fuel transfer pump, Part No. 3918076, is of-
fered as an option on B Series engines equipped with
distributor-type fuel injection pumps.
NOTE: Part No. 3918076 and 3918000 are identical in ap-
pearance. The pumping spring free length can be mea-
sured to identify the fuel transfer pump.
Fuel transfer pump, Part No. 3918000, spring free length
is 53.5 mm [2-7/64 in].
Piston-style fuel transfer pump, Part No. 39108000, comes
standard on the 300-hp marine B Series engine.
NOTE: Part No. 3918076 and 3918000 are identical in ap-
pearance. The pumping spring free length can be mea-
sured to identify the fuel transfer pump.
Fuel transfer pump, Part No. 3918000, spring free length
is 58 mm [2-9/32 in].
Piston-style fuel transfer pump, Part No. 3921550, comes
standard on the '91B Series engines equipped with the
Bosch P7100 in-line fuel injection pumps.
Piston-style fuel transfer pump, Part No. 3925709, comes
standard on the '94B Series engines equipped with the
Bosch P7100 in-line fuel injection pumps.
The piston-style fuel transfer pump is mechanically driven
by a plunger running against a special lobe on the cam-
shaft. The fuel transfer pump contains a pumping piston
and check valves to control the flow of fuel, and bleed back
during engine shutdown.
L-937