TOHATSU BFT115A Service Manual page 247

FUEL PRESSURE REGULATOR
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.
Relieve the fuel pressure (page 5-79).
Remove the service check bolt and set the special tool
in the threaded bolt hole.
TOOL:
Fuel pressure gauge (1)
Check that the pressure regulator control tube (1) is not
bent, disconnected, or damaged.
Remove the propeller:
– Standard rotation type (page 16-6)
– Counter rotation type (page 17-6)
Set the gear case in a test tank filled with water and
start the engine.
With the engine idling, disconnect the control tube from
the pressure regulator (2) 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
270 – 320 kpa (2.8 – 3.3 kgf/cm
If the fuel pressure does not rise, connect the control
tube (1) to the pressure regulator (2).
Pinch the pressure regulator return hose (3) that goes
from the pressure regulator to the vapor separator 2 or
3 times lightly, and measure the fuel pressure again.
If the measurement is out of the specified standard
pressure, replace the pressure regulator.
• Protect the pressure regulator return hose by
winding a shop towel or equivalent around the hose,
and lightly pinch the hose with the pliers (4).
07406-0040004
-1 (rpm)]:
2 , 40 – 47 psi)
FUEL SYSTEM
(1)
(1)
(1)
(3)
(4)
(2)
(2)
5-129