6-7
FUEL
Fuel system
TIP:
• After disconnecting the quick connector
a
,
be careful not to lose the retainer
c
.
• Cover the quick connector and fuel rail with
a plastic bag to prevent damage and to pro-
tect them from dirt.
Measuring the fuel pressure
1.
Reduce the fuel pressure. See “Reducing
the fuel pressure” (6-6).
2.
Disconnect the quick connector from the
fuel rail. See steps 2 and 3 in
“Disconnecting the quick connector” (6-
6).
3.
Connect the special service tool
a
to the
quick connector and the fuel rail.
4.
Connect the special service tool
b
.
WARNING! To prevent fuel from
leaking out, screw in the gauge gently
until it is connected firmly. Also, make
sure that the drain screw
a
is
tightened securely, before measuring
the fuel pressure.
5.
Turn the engine start switch to ON, and
then measure the fuel pressure within 5
seconds.
TIP:
• The fuel pressure will decrease 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.
6.
Start the engine and warm it up until the
engine idle speed stabilizes at 650–750
r/min.
7.
Measure the fuel pressure.
8.
Reduce the fuel pressure. See “Reducing
the fuel pressure” (6-6).
Fuel pressure gauge adapter
a
:
90890-06842
a
Fuel pressure gauge
b
: 90890-06786
Fuel pressure (reference data):
330.0 kPa (3.30 kgf/cm
2
, 47.9 psi)
Fuel pressure (reference data):
280.0 kPa (2.80 kgf/cm
2
, 40.6 psi)
at 700 r/min
a
a
b
Summary of Contents for F225F
Page 1: ...SERVICE MANUAL 6CE 28197 3N 11 F L 225F F L 250D F L 300B ...
Page 4: ......
Page 54: ...1 31 SPEC Specification MEMO ...
Page 89: ...2 34 Lower unit 0 1 2 3 4 5 6 7 8 9 10 A MEMO ...
Page 263: ...6 28 Canister 0 1 2 3 4 5 6 7 8 9 10 A j k f b ...
Page 477: ...8 98 Shimming counter rotation model 0 1 2 3 4 5 6 7 8 9 10 A MEMO ...
Page 537: ...9 58 PTT cylinder 0 1 2 3 4 5 6 7 8 9 10 A MEMO ...
Page 562: ...A 1 MEMO ...
Page 565: ......
Page 566: ...May 2010 1 ABE E_1 YAMAHA MOTOR CO LTD ...
Page 576: ...A 13 ...