Fuel Pressure Regulator; Inspection - TOHATSU BFT75A Service Manual

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FUEL SYSTEM

FUEL PRESSURE REGULATOR

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.
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.
TOOL:
Fuel pressure gauge, 0 – 100 psi [1] 07406-004000B
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.
Standard fuel pressure
[At idle speed of 750 ± 50 min
325 – 375 kpa (3.3 – 3.8 kgf/cm
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.
5-98
-1
(rpm)]:
2 , 47 – 54 psi)
[1]
[2]
[1]
[1]