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BF135A•BF150A
5-103
3) Disconnect the pressure regulator control tube from the
pressure regulator, and clamp the vacuum tube.
4) Remove the propeller. Set the outboard motor gear case in
a test tank filled with water. Start the engine and measure
the fuel pressure at idling.
5) When the fuel pressure is outside the specified standard
pressure, check the following.
When fuel pressure is higher than standard pres-
sure:
• Check the pressure regulator return hose for kinking, col-
lapse or restrictions.
• Check the pressure regulator for proper operation
When the fuel pressure is lower than the standard
pressure:
• Check the pressure regulator for proper operation
• Check the high pressure side fuel strainer for clogging
• Check the high pressure side fuel pump for proper oper-
6) After check, replace the sealing washer with a new one and
tighten the service check bolt to the specified torque.
TORQUE: 12 N
•
m (1.2 kgf
•
m, 9 lbf
•
ft)
7) Connect the vacuum tube to the pressure regulator.
TUBE CLAMP
(Commercially available)
PRESSURE REGULATOR
CONTROL TUBE
PRESSURE REGULATOR
SEALING WASHER
Do not reuse.
Standard fuel pressure
270 – 320 kPa
(At idle speed of
(2.8 – 3.3 kgf/cm
2
,
650 ± 50 min
-1
/rpm)
39.8 – 46.9 psi)
SERVICE CHECK BOLT
12 N·m (1.2 kgf·m,
9 lbf·ft)