Yamaha F150B, Service Manual

Page: 187 / 458

6-10
Fuel pump
0
1
2
3
4
5
6
7
8
9
10
A
Checking the fuel pump
1. Connect the special service tool
a
to the
fuel pump inlet
a
.
2. Cover the fuel pump outlet
b
with a fin-
ger, and then apply the specified positive
pressure. Check that there is no air leak-
age.
3. Apply the specified negative pressure
and check that there is no air leakage.
4. Connect the special service tool
a
to the
fuel pump outlet
b
.
5. Apply the specified positive pressure and
check that there is no air leakage.
Disassembling the fuel pump
1. Disassemble the fuel pump assembly
into the fuel pump body 1 assembly
a
,
the fuel pump body 2
b
, and the cover
c
.
2. Hold the fuel pump body 1 assembly
a
.
Vacuum/pressure pump gauge set
a
:
90890-06756
Specified positive pressure:
50.0 kPa (0.50 kgf/cm 2 , 7.3 psi)
Specified negative pressure:
30.0 kPa (0.30 kgf/cm 2 , 4.4 psi)
50 0
a
b
a
a
0
-
100
-
30
Specified positive pressure:
50.0 kPa (0.50 kgf/cm
2
, 7.3 psi)
General cylindrical tool
d
:
a
= 20.0 mm (0.79 in)
b
= 17.0 mm (0.67 in)
50 0
b
a
a
b
c
a
a
d
a
b
d