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Yamaha E40J - Assembling the Fuel Pump; Checking the Fuel Joint

Yamaha E40J
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6F65G11
4-12
9
8
7
6
5
4
3
2
1
Checking the fuel joint
1. Visually check the fuel joint for cracks or
damage.
2. Connect the special service tool at the
outlet of fuel joint.
3. Apply the specified pressure to check
that the pressure is maintained for 10
seconds. Replace the fuel joint if neces-
sary.
Assembling the fuel pump
NOTE:
Clean the parts and soak the valves and the
diaphragms in gasoline before assembly to
obtain prompt operation of the fuel pump
when starting the engine.
1. Install the valves 1 onto the fuel pump
body.
2. Install new gaskets 2, the diaphragms
3, and covers 4.
NOTE:
Make sure that the gaskets and diaphragms
are kept in place through the assembly
process.
4
3
2
2
3
4
6F640050
1
1
6F640040
Vacuum/pressure pump gauge set:
90890-06756
Specified pressure:
50 kPa (0.5 kgf/cm
2
, 7.3 psi)
Fuel pump

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