Checking The Fuel Pump; Pressure Gauge - Yamaha MT-03 Service Manual

3. Install:
• Throttle body assembly
NOTE:
Align the projection "a" on the throttle body as-
sembly with the slot "b" throttle body joint.
a
4. Install:
• Throttle cable
5. Adjust:
• Throttle lever free play
Refer to "ADJUSTING THE THROTTLE
CABLE FREE PLAY" on page 3-5.
6. Adjust:
• Engine idling speed
Refer to "ADJUSTING THE ENGINE
IDLING SPEED" on page 3-5.
7. Check:
• Throttle position sensor
Refer to "CHECKING AND ADJUSTING
THE THROTTLE POSITION SENSOR" on
page 7-9.
EAS00819

CHECKING THE FUEL PUMP

WARNING
Gasoline is extremely flammable and under
certain circumstances there can be a dan-
ger of an explosion or fire. Be extremely
careful and note the following points:
• Stop the engine before refueling.
• Do not smoke, and keep away from open
flames, sparks, or any other source of fire.
• If you do accidentally spill gasoline, wipe it
up immediately with dry rags.
• If gasoline touches the engine when it is
hot, a fire may occur. Therefore, make sure
the engine is completely cool before per-
forming the following test.
1. Check:
• Fuel pump operation
THROTTLE BODY ASSEMBLY
a. Fill the fuel tank.
b. Put the end of the fuel hose into an open
container.
c. Connect a battery (DC 12 V) to the fuel
pump coupler as shown.
• Positive battery lead
b
• Negative battery lead
d. If fuel flows out of the fuel hose, the fuel
pump is OK. If fuel does not flow, replace the
fuel pump.
2. Check:
• Fuel pressure
a. Remove the fuel tank.
Refer to "FUEL TANK" on page 7-1.
b. Connect the pressure gauge "1" to the
adapter "2".
c. Connect the fuel pressure adapter to the fu-
el pump and fuel hose "3".
7-8
Red/Blue "1"
Black "2"
G/W B
B R/L
1
2

Pressure gauge

90890-03153
Fuel pressure adapter
90890-03176
+