Yamaha F75F - Checking the Fuel Cup Assembly; Checking the Fuel Filter Assembly; Checking the Fuel Filter Element; Removing the Fuel Filter Assembly

Fuel tank
6-6
Removing the fuel filter assembly
Cover the fuel components using a rag to pre-
vent fuel from spilling out.
Checking the fuel filter assembly
1. Check:
• No air leakage
Air leakage  Replace the O-ring, fuel cup
assembly, or fuel filter assembly.
a. Connect the leakage tester “1” to the
fuel inlet “a”.
b. Block the fuel outlet “b” using a rubber
plug “2”,
and then apply the specified
positive pressure. Replace the O-ring,
fuel cup assembly, or fuel filter assem-
bly if the specified pressure cannot be
maintained for 15 seconds or more.
c. Connect the special service tool “1” to
the fuel outlet “a”.
d. Block the fuel inlet “b” using a rubber
plug “2
”, and then apply the specified
negative pressure. Replace the O-
ring, fuel cup assembly, or fuel filter
assembly if the specified pressure
cannot be maintained for 15 seconds
or more.
Checking the fuel filter element
1. Check:
• Fuel filter e
lement
Dirt/residue  Replace.
Checking the fuel cup assembly
1. Check:
• Fuel cup
assembly
Foreign material  Clean.
Cracked  Replace.
When cleaning the fuel cup assembly, do
not remove the clip and float.
Leakage tester “1”
90890-06840
Leakage tester “1”
(commercially available)
Fuel inlet holding pressure (positive
pressure)
200 kPa (2.00 kgf/cm², 29.0 psi)
a
a
1
b
2
b
Vacuum/pressure pump gauge set
“1”
90890-06945
Fuel outlet holding pressure (nega-
tive pressure)
80 kPa (0.80 kgf/cm², 11.6 psi)
b
a
2
1
b
a