Measuring The Fuel Pressure - SELVA MARINE Blue Whale 250 EFI Service Manual

FUEL

Measuring the fuel pressure

1. Disconnect the quick connector from the
vapor separator.
NOTE:
Before disconnecting the quick connector,
reduce the fuel pressure.
2. Connect fuel pressure gauge adapter B
1 between the quick connector and
vapor separator.
3. Connect the fuel pressure gauge 2 to
fuel pressure gauge adapter B.
2
1
WARNING
• Gently screw in the gauge until it is
firmly connected to prevent fuel from
leaking out.
• Before measuring the fuel pressure,
make sure that the drain screw is tight-
ened securely.
• Do not loosen the drain screw while
measuring the fuel pressure. Loosening
the drain screw can cause fuel to spray
out creating a fire hazard.
Fuel pressure gauge adapter B 1:
90890-06942
Fuel pressure gauge 2:
90890-06786
4-7
Fuel system
PORT
S6P24290E
4. Turn the engine start switch to ON, and
then measure the fuel pressure within 5
seconds.
NOTE:
• The fuel pressure will decreases after 5
seconds later when the engine start switch
is turned to ON.
• The high-pressure fuel pump does not
operate when the engine start switch is
turned to ON again within 10 seconds after
turning the switch to OFF.
Fuel pressure (reference data):
300 kPa (3.0 kgf/cm
5. Measure the fuel pressure 5 seconds
after turning the engine start switch to
ON.
Fuel pressure (reference data):
280 kPa (2.8 kgf/cm
6. Start the engine, warm it up for 5 min-
utes, and then measure the fuel pressure
at engine idle speed. If below specifica-
tion, check the high-pressure fuel line
and the vapor separator.
Fuel pressure (reference data):
260 kPa (2.6 kgf/cm
7. Reduce the fuel pressure.
8. Remove the special service tools.
WARNING
• After measuring the fuel pressure, cover
the end of the hose with a clean, dry rag,
point the hose downward, and then
loosen the drain screw to drain the
remaining fuel from the hose and gauge.
• When storing the fuel pressure gauge,
make sure that the drain screw is tight-
ened securely.
9. Connect the quick connector.
2
, 43.5 psi)
2
, 40.6 psi)
2
, 37.7 psi)
6P23H11