Yamaha F200B, Service Manual

Page: 218 / 579

6-9
FUEL
Fuel system
TIP:
Position the special service tool 3 under the
wiring harness
b
. Otherwise, the OCV cou-
pler (PORT) cannot be connected to the OCV
(PORT).
6. Connect the special service tool 4 .
WARNING! Gently screw in the gauge
until it is firmly connected to prevent
fuel from leaking out. Also, make sure
that the drain screw
c
is tightened
securely, before measuring the fuel
pressure.
7. Connect the OCV coupler (PORT).
8. Turn the engine start switch to ON, and
then measure the fuel pressure within 5
seconds.
TIP:
• The fuel pressure decreases 5 seconds
after 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 engine start switch to OFF.
9. Start the engine and warm it up until the
engine idle speed stabilizes at 600–700
r/min.
10. Measure the fuel pressure.
11. Turn the engine start switch to OFF.
12. Reduce the fuel pressure. See “Reduc-
ing the fuel pressure” (6-7).
13. Disconnect the OCV coupler (PORT).
14. Disconnect the special service tools.
WARNING! Before disconnecting the
special service tools, cover the end of
the hose using a clean and dry rag.
15. Fasten the wiring harness and ther-
moswitch connectors (PORT) using the
holder.
16. Connect the OCV coupler (PORT), and
then install the fuel rail cover (PORT).
17. Connect the quick connector to the fuel
rail (PORT). See “Connecting the quick
connector” (6-8).
Fuel pressure gauge adapter B
3
:
90890-06942
C
3
3
b
3
4
c
Fuel pressure gauge
4
: 90890-06786
Fuel pressure (reference data):
290.0 kPa (2.90 kgf/cm
2
, 42.1 psi)
Fuel pressure (reference data):
260.0 kPa (2.60 kgf/cm
2
, 37.7 psi) at
engine idle speed