Removing The Fuel Injector; Checking The Fuel Rail And Fuel Injector; Installing The Fuel Injector - Yamaha F30B 2018 Service Manual

Removing the fuel injector

Cover the fuel components using a rag to pre-
vent fuel from spilling out.
1. Reduce:
• Fuel pressure
See "Reducing the fuel pressure" (6-1).
2. Disconnect:
• Quick connector
See "Disconnecting the quick connector"
(6-1).

Checking the fuel rail and fuel injector

1. Check:
• Fuel rail
Cracked/deformed  Replace.
2. Measure:
• Fuel volume injected by the injector
See the "Fuel Injection Meter Operation
Manual" (90894-62982-85).
Do not use gasoline when measuring the
fuel injection volume. Otherwise, the cylin-
der could be damaged, which can cause a
gasoline leakage. Make sure to follow the
instructions for operation of the fuel injec-
tion meter.
TIP:
• When measuring, obtain a result from the av-
erage of 4 measurements.
• It is not possible to obtain correct measure-
ments under disparate test conditions.
• Make sure to fully charge the battery.
• The cylinder is graduated in increments of 2.5
cm³ (2.5 cc).
• Make sure to comply with the laws and regu-
lations of the region when disposing of the
used test fuel.
Fuel injection meter
FIM20000ME
Fuel injection volume
71–83 cm³ (90 cc)/30 sec
Test fuel
Dry sorbent (viscosity: 1.2  0.03
mm²/s, specific gravity: 0.774 [15
C])
Test fuel temperature
22–24 C (room temperature and
test fuel temperature should be
the same)
Test fuel pressure
300  1.5 kPa
Measuring cylinder internal pres-
sure (standard atmosphere pres-
sure)
960–1060 hPa

Installing the fuel injector

1. Install:
• O-ring New
• Fuel injector
• Holder
• Fuel rail
• Fuel rail bolt
6-26
Fuel injector