Removing The Fuel Pump Assembly; Checking The Fuel Pump Assembly - Yamaha F150A Service Manual

Removing the fuel pump assembly

Cover the fuel components using a rag to
prevent fuel from spilling out.
1. Disconnect the fuel hoses "1", "2", "3",
"4", and "5".
4
3
1
2. Remove the fuel pump assemblies "1".

Checking the fuel pump assembly

1. Connect the special service tool "1" to
the fuel pump inlet "a".
2. Block the fuel pump outlet "b" using a
rubber plug "2", and then apply the speci-
fied positive pressure. Check that there is
no air leakage.
5
2
1
6-13
2
b
a
Vacuum/pressure pump gauge set "1":
90890-06945
Specified positive pressure:
50.0 kPa (0.50 kgf/cm
3. Apply the specified negative pressure,
and then check that there is no air leak-
age.
Specified negative pressure:
30.0 kPa (0.30 kgf/cm
4. Connect the special service tool "1" to
the fuel pump outlet "a".
5. Block the fuel pump inlet "b" using a rub-
ber plug "2".
6. Apply the specified positive pressure,
and then check that there is no air leak-
age.
2
b
a
Fuel pump
1
2
, 7.3 psi)
2
, 4.4 psi)
1