Yamaha F50D Servise Manual - page 127
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A
Checking the fuel joint
1.
Check the fuel joint. Replace if cracked
or damaged.
2.
Connect the special service tool
1
to the
fuel joint outlet
a
.
3.
Apply the specified positive pressure.
Replace the fuel joint if the specified
pressure cannot be maintained for at
least 10 seconds.
Checking the fuel filter assembly
1.
Connect a vacuum/pressure pump
gauge and a meter
1
to the fuel inlet
a
.
2.
Cover the fuel outlet
b
with a rubber
plug
2
, and then apply the specified
positive pressure. Replace the O-ring,
fuel filter cup, or fuel filter assembly if the
specified pressure cannot be maintained
for at least 15 seconds.
TIP:
9
To check the fuel filter element, see
“Checking the fuel filter” (10-15).
9
Use a commercially available vacuum/pres-
sure pump gauge and meter that can be
pressurized up to 200.0 kPa (2.0 kgf/cm
2
,
29.0 psi).
Vacuum/pressure pump gauge set
1
:
90890-06756
Specified positive pressure:
50.0 kPa (0.5 kgf/cm
2
, 7.3 psi)
1
a
Vacuum/pressure pump gauge set
1
:
Commercialy available
Specified positive pressure:
200.0 kPa (2.0 kgf/cm
2
, 29.0 psi)
A
A
2
a
a
b
b
1
Fuel filter