Checking The Pressure Regulator - Yamaha F30B 2018 Service Manual

k. Disconnect the special service tool.
Before disconnecting the special service
tools, cover the end of the hose using a
clean and dry rag.
l. Connect the quick connector to the fuel
rail.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲

Checking the pressure regulator

1. Reduce the fuel pressure. See "Reducing
the fuel pressure" (6-1).
2. Disconnect the quick connector from the
delivery pipe. See "Disconnecting the
quick connector" (6-1).
3. Check:
• Pressure regulator
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Connect the special service tools "1" and
"2". See "Measuring the fuel pressure" (6-
1).
b. Disconnect the pressure regulator hose
"3", and then connect the special service
tool "4" to the pressure regulator "5".
c. Block the end of the pressure regulator
hose "3" using a rubber plug "6".
A
1
3
5
6
2
B
1
A. Worldwide
B. USA and Canada
d. Start the engine and let it idle.
e. Check that the fuel pressure is reduced
when negative pressure is applied to the
pressure regulator.
f. Stop the engine.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
4. Reduce the fuel pressure. See "Reducing
the fuel pressure" (6-1).
5. Disconnect the special service tools, and
then connect the pressure regulator hose
and quick connector.
4
4
6-3
5
2
Fuel system
3
4
6
4