Fuel Pump (Low Pressure Side); Inspection; Fuel Pump (High Pressure Side) - TOHATSU BFT75A Service Manual

dummyhead dummyhead

FUEL PUMP (LOW PRESSURE SIDE)

INSPECTION

Remove the fuel pump (low pressure side) (page 5-67).
Push the fuel pump plunger [1] and make sure the
plunger moves smoothly.
If the plunger is stiff, replace the fuel pump (low
pressure side).

FUEL PUMP (HIGH PRESSURE SIDE)

INSPECTION
Gasoline is highly flammable and explosive.
You can be burned or seriously injured when
handling fuel.
• Keep heat, sparks, and flame away.
• Wipe up spills immediately.
• Handle fuel only outdoors.
DISCHARGE VOLUME INSPECTION
• Use a known-good battery for the inspection.
Disconnect the pressure regulator return hose [1].
Place a measuring cylinder [2] under the hose.
Turn the combination switch ON.
Operate the fuel pump for approximately 2 seconds and
measure the fuel discharge volume of gasoline using a
measuring cylinder.
Discharge volume
20 cm
If the discharge volume is less than the specified value,
or no fuel is discharged, check the following.
– Fuel pump (high pressure side) circuit (page 5-100)
– Clogged fuel filter (high pressure side), and fuel
hose/line.
– Pressure regulator operation (page 5-98)
If no abnormality is detected, replace the fuel pump
(high pressure side) (page 5-76).
3
(0.7 US oz, 0.7 Imp oz) or more
[1]
[2]
FUEL SYSTEM
[1]
5-99