Yamaha F400A 2022 - Installing the Low-Pressure Fuel Pump

Low-pressure fuel pump
6-8
2. Check:
• Relief valve holding pressure
Out of specification → Replace.
a. Connect the special service tool “1” to
the relief valve outlet “a”.
b. Apply the specified positive pressure,
and check that the specified pressure
is maintained.
Installing the low-pressure fuel pump
1. Assemble:
• Holder “1”, “2”
• Bushing “3”
• Low-pressure fuel pump “4”
• Feed valve “5”
• Fuel hose
• Quick connector “6”
• Relief valve “7”
• Low-pressure fuel pump holder “8”, “9”
•Clamp
•Plastic tie
2. Install:
• Low-pressure fuel pump bracket “1”
• Low-pressure fuel pump assembly “a”
(along with feed valve, relief valve, and fuel
hoses)
Holding pressure (positive pres-
sure)
200.0 kPa (2.00 kgf/cm², 29.0
psi)
Vacuum/pressure pump gauge
set “1”
90890-06945
Pressure/vacuum tester “1”
YB-35956-B
1
a
New
3
6
1
2
5
1
4
7
8
9
1
a