TOHATSU BFT250A - Fuel Pressure Regulator; Inspection

5-111
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FUEL SYSTEM
FUEL PRESSURE REGULATOR
INSPECTION
Relieve the fuel pressure (page 5-66).
Remove the service check bolt and set the special tool
in the threaded bolt hole.
Check that the pressure regulator vacuum tube [1] is
not bent, disconnected, or damaged.
Remove the propeller:
– Standard rotation type (page 16-6)
– Counter rotation type (page 17-5)
Set the gear case in a test tank filled with water and
start the engine and then check the fuel pressure.
With the engine idling, disconnect the vacuum tube
from the intake manifold [2] and clamp the vacuum
tube.
Check the fuel pressure. It should be higher than the
pressure measured with the vacuum tube connected.
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.
TOOL:
Fuel pressure gauge,
0 – 100 psi [1] 07406-004000B
[1]
Standard fuel pressure
[At idle speed of 650 ± 50 min
-1
(rpm)]:
280 – 330 kPa (2.9 – 3.4 kgf/cm
2
, 41 – 48 psi)
[1]
VAPOR SEPARATOR
VACUUM TANK
[1]
PRESSURE
REGULATOR
FUEL
INJECTOR
[2]
[2]