Checking The Fuel Pump - Yamaha EH63 Service Manual

FUEL PUMP
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CHECKING THE FUEL PUMP

1.
Check:
• Fuel hose "1"
• Fuel hose (carburetor side) "2"
• Pulsar hose "3"
• Fuel pump "4"
Cracks/damage  Replace.
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2.
Check:
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• Fuel pump operation
Checking steps:
a. Connect a manual vacuum pump (vacuum/pres-
Vacuum/pressure pump gauge set:
Pressure/ vacuum tester:
b. Place the container near the lower side of the
c. Operate the manual vacuum pump (vacuum/
d. If the gasoline does not flow out, replace the fuel
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sure pump gauge set) "1" to the pulsar hose "2".
90890-06945
YB-35956-B
fuel hose (carburetor side) "3".
pressure pump gauge set) "1" and check if gaso-
line flows out from the fuel hose (carburetor side)
"3".
pump.
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