TOHATSU BFT115A Service Manual page 248

FUEL SYSTEM
FUEL PUMP (LOW PRESSURE SIDE)
INSPECTION
Remove the fuel pump (low pressure side) (page 5-80).
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).
Install the fuel pump (low pressure side) (page 5-80).
FUEL PUMP (HIGH PRESSURE SIDE)
INSPECTION
DISCHARGE VOLUME INSPECTION
Gasoline is highly flammable and explosive.
You can be burned or seriously injured when han-
dling fuel.
• Keep heat, sparks, and flame away.
• Wipe up spills immediately.
• Handle fuel only outdoors.
• Use a known-good battery for the inspection.
Disconnect the pressure regulator return hose (1) and
connect a hose (2) that is equivalent to the return hose
to the pressure regulator.
Place a suitable container (3) under the hose as shown.
Turn the combination switch ON.
Operate the fuel pump for approximately 2 seconds and
measure the fuel discharge volume.
Discharge volume
45 cm
If the discharge volume is less than the specified value,
or no fuel is discharged, check the following.
– Open circuit or poor contact of the main wire
harness
– Clogged fuel filter (high pressure side) (page 3-26)
– Clogged fuel hose/line (page 3-27)
– Pressure regulator operation (page 5-129)
If the fuel pump does not operate when the combination
switch is turned ON, inspect the fuel pump circuit (page
5-131).
5-130
3 (1.5 US oz, 1.6 Imp oz) or more
(2)
(3)
(1)
(1)