Fuel pump – Generac Power Systems 53187 User Manual
Page 98
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PART 4
ENGINE FUEL SYSTEM
SECTION 4.2
FUEL PUMP
Section 4.2
FUEL PUMP
General
The electric fuel pump is turned on by the action of
an engine control circuit board, housed in the unit
control panel. Power for pump operation is supplied via
Wire No. 14 which is electrically hot only during engine
running condition. Wire No. 14 also energizes a FUEL
SOLENOID (FS) which then opens to supply fuel to the
system.
NOTE: For additional Inforniatlon on the engine
control circuit board, refer to Part 5 of this m anual,
"ENGINE ELECTRICAL SYSTEM ".
Testing the Fuel Pump
An ohmmeter or a volt-ohm-milliammeter (VOM)
may be used to test fuel pump windings for continuity.
To perform an operational test, disconnect the
pump outlet line from the pump and connect the pump
inlet line to a suitable fuel supply. Connect a 12 volts
DC power supply to the white pump wire (+); a negative
(-) DC power supply to the black wire (-). The pump
should operate and pump fuel out of the outlet side, if
not, replace the pump.
PAGE 4.2-1