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FUEL SYSTEM / FUEL INJECTION
4.9
FUEL PUMP ASSEMBLY
NOTE: 800 EFI fuel connections are quick--connect
couplings vs 700 EFI connections.
An electric fuel pump assembly is usedto transfer fuel
to the EFI system from inside the fuel tank. This
assembly includes the fuel pump, regulator and fuel
gauge sender. The pump is rated for a minimum
output of 25 liters per hour at 39 psi and has a
non--serviceable internal 30--micron filter. In addition,
the pump has a replaceable 10--micron filter attached
to the pump outlet, which is located under the strut
mount.
Fuel Pump
Regulator
Fuel Gauge
Sender
Internal
30 Micron Strainer
(Bottom)
Fuel pump is not replaceable.
Picture is for reference only.
700 EFI Shown
When the key switch is turned to ”ON”, the ECU
activates the fuel pump, which pressurizes the
system for start--up.
The ECU switches off the pump preventing the
continued delivery of fuel in these instances:
G If the key switch is not promptly
turned to the ”start” position
G if the engine fails to start, or
G if the engine is stopped with the key
switch ”on” (as in the case of an
accident),
In these situations, the “check engine” light will go on,
but will turn off after 4 cranking revolutions if system
function is OK. Once the engine is running, the fuel
pump remains on.
NOTE: FUEL GAUGE SENDER TEST -- To test fuel
gauge sender function, refer to Chapter 10 in this
service manual.
FUEL PUMP TEST
The fuel pump/tank assembly is non--serviceable and
must be replaced if determined to be faulty. If a fuel
delivery problem is suspected, make certain the filters
are not plugged, that the pump is being activated
through the ECU, all electrical connections are
properly secured, the fuses are good, and a minimum
of 7.0 volts is being supplied. If during starting the
battery voltage drops below 7.0 volts, a reduction of
fuel pressure may occur resulting in a lean starting
condition. If required, testing of the fuel pump and
circuitry may be conducted.
CAUTION:
Check the fuel test valve for any possible fuel
seepage after performing any tests or
procedures. Fuel is extremely flammable and
may cause severe burns, injury, or death. Do not
use any device that produces a flame or electrical
devicesthatmaysparkaround fuelor fuelvapors.
700 EFI Shown
1. Remove the fuel test valve cap. Connect the
pressure hose of the Polaris pressure tester
(PN
PU--43506)
to the test valve on the fuel rail. Route
the clear hose into a portable gasoline container
or the equipment fuel tank.