Checking The Fuel Pump - Yamaha 200A Service Manual

FUEL

Checking the fuel pump

1. Disconnect the fuel hoses.
NOTE:
To disconnect the fuel hoses, place a drain pan
below the pump-hose connection so as not to
spill any fuel.
2. Mount the special service tool at the fuel
pump inlet.
3. Apply the specified positive pressure while
closing the pump outlet with a finger. Make
sure no air leakage is detected.
Vacuum/pressure pump gauge set:
90890-06756
Specified pressure:
50 kPa (0.5kgf/cm
4. Apply the specified negative pressure to
make sure that no air leakage is detected.
Specified pressure:
30 kPa(0.3kgf/cm
4-7
Fuel system
60H40080
2 )
60H40090
2
)
5. Mount the special service tool at the fuel
pump outlet.
6. Apply the specified positive pressure to
make sure that no air leakage is detected.
Perform disassembly inspection, if neces-
sary.
Specified pressure:
50 kPa(0.5kgf/cm
NOTE:
Duly assemble the fuel pump valve to the fuel
pump body, and moisten the inside of fuel
pump with gasoline or the like to obtain better
sealing ability.
60H40100
2 )
60H5E11