Checking The Primer Pump; Checking The Fuel Joint; Assembling The Fuel Filter Assembly - Yamaha F30B 2018 Service Manual

Checking the primer pump

1. Check:
• No air leakage
Air leakage  Replace.
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a. Connect the special service tool "1" to the
primer pump inlet "a".
b. Block the fuel outlet "b" using a rubber plug
"2", and then apply the specified positive
pressure. Replace the primer pump if the
specified pressure cannot be maintained
for 30 seconds or more.
a
2
b
Vacuum/pressure pump gauge
set "1"
90890-06945
Pressure/vacuum tester "1"
YB-35956-B
Positive pressure
170.0 kPa (1.70 kgf/cm², 24.7
psi)
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Checking the fuel joint

1. Check:
• Fuel joint
Cracked/damaged  Replace.
• Holding pressure
Out of specification  Replace.
Holding pressure (positive pres-
sure)
49.0 kPa (0.5 kgf/cm², 7.11 psi)
1
6-6
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a. Connect the special service tool "1" to the
fuel joint outlet "a".
b. Apply the specified positive pressure. Re-
place the fuel joint if the specified pressure
cannot be maintained for at least 10 sec-
onds.
a
Vacuum/pressure pump gauge
set "1"
90890-06945
Pressure/vacuum tester "1"
YB-35956-B
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Assembling the fuel filter assembly

1. Install:
• Fuel filter element
• O-ring New
• Fuel cup assembly
• Clamp
a
b
a: 115–125 mm (4.53–4.92 in)
b: 20–30 mm (0.79–1.18 in)
Fuel cup assembly
5 N·m (0.5 kgf·m, 3.7 lb·ft)
Fuel filter
1