Inspecting The Pressure Regulator - Yamaha SX150C Service Manual

FUEL
HIGH-PRESSURE FUEL LINE
3055
INSPECTING THE PRESSURE
REGULATOR
Inspect:
• Pressure regulator
Faulty → Replace the pressure regula-
tor.
Inspecting steps
(1) Install the fuel pressure gauge onto the
pressure check valve and then install
the Mity vac onto the pressure regula-
tor vacuum hose.
Fuel pressure gauge ................. 1
YB-06766 / 90890-06766
Mity vac ..................................... 2
YB-35956 / 90890-06756
(2) Start the engine.
(3) Apply vacuum pressure with the Mity
vac.
Vacuum pressure
Approx.
25 kPa (0.25 kg/cm
(4) Inspect the fuel pressure.
NOTE:
Make sure the fuel pressure in the high-
pressure fuel line lowers conversely in rela-
tion to the amount of pressure that is
applied to the pressure regulator.
4-4
E
2
, 3.56 psi)