TOHATSU BFT75A - Fuel Pressure Regulator; Inspection

5-98
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FUEL SYSTEM
FUEL PRESSURE REGULATOR
INSPECTION
Check that the pressure regulator control tube [1] is not
bent, disconnected, or damaged.
Relieve the fuel pressure (page 5-66).
Remove the service check bolt and set the special tool
in the threaded bolt hole.
Remove the propeller (page 16-3).
Set the outboard motor gear case in a test tank filled
with water. Start the engine and measure the fuel
pressure at idle.
With the engine idling, disconnect the control tube from
the pressure regulator [1] and clamp the control tube.
Check the fuel pressure. It should be higher than the
pressure measured with the control tube connected.
If the fuel pressure does not rise, connect the control
tube [1] to the pressure regulator.
Pinch the pressure regulator return hose that goes from
the pressure regulator to the vapor separator 2 or 3
times lightly, and measure the fuel pressure again.
• Protect the pressure regulator return hose by
winding a shop towel or equivalent around the hose,
and lightly pinch the hose with the pliers.
If the measurement is out of the specified standard
pressure, replace the pressure regulator.
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]
[2]
Standard fuel pressure
[At idle speed of 750 ± 50 min
-1
(rpm)]:
325 – 375 kpa (3.3 – 3.8 kgf/cm
2
, 47 – 54 psi)
[1]
[1]