Briggs & Stratton VANGUARD M490000, Repair Manual

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CHECK/RELIEVE FUEL SYSTEM PRESSURE
Safety Precautions
Always observe the following safety precautions before
removing any fuel system components.
WARNING
• Wear proper eye protection.
• Relieve fuel system pressure.
• Be sure there is no open flame or potential
ignition sources in the area.
• When removing a fuel hose or fitting, cover with a
shop towel to catch any fuel leakage.
• Collect any fuel and/or shop towels in approved
containers and dispose of properly.
• Exercise care to keep dirt and debris out of fuel
lines and fuel pump.
• Keep a dry chemical fire extinguisher on hand in
case of emergencies.
Check/Relieve Fuel System Pressure for
Model 490000
WARNING
The fuel in the fuel rail is under high pressure.
To avoid an uncontrolled discharge or spray of
fuel, and to reduce the risk of fire and personal
injury, always relieve fuel system pressure before
servicing.
Proceed as follows:
NOTE: Perform all steps if checking fuel system
pressure. If only relieving fuel system pressure, perform
steps 1-4 and 8-10.
1. Turn Ignition OFF.
2. Obtain Briggs & Stratton Fuel Pressure Gauge (Part
No. 19627).
3. Locate fuel pressure test port (Schrader valve) on fuel
pump module to fuel rail connector.
4. Remove protective cap from Schrader valve and
install fuel pressure gauge.
NOTE: A small amount of gasoline may drain from
the Schrader valve when the gauge is installed. Wrap
a shop towel around the valve fitting to catch any fuel
leakage.
5. Turn Ignition ON to pressurize fuel system.
6. Note the reading of the fuel pressure gauge. Fuel
pressure should remain steady at 38-43 psi (262-296
kPa).
7. Turn Ignition OFF.
8. Position the clear bleed tube in an approved
container and press the pressure relief button on
the gauge assembly to relieve fuel system pressure.
Fully depress and hold the pressure relief button until
pointer on the dial face is resting on the stop pin.
9. Remove fuel pressure gauge from Schrader valve.
NOTE: A small amount of gasoline may drain from
the Schrader valve when the gauge is removed. Wrap
a shop towel around the valve fitting to catch any fuel
leakage.
10. Install protective cap on Schrader valve.
Check/Relieve Fuel System Pressure for
Models 540000/610000
WARNING
The fuel in the fuel rail is under high pressure.
To avoid an uncontrolled discharge or spray of
fuel, and to reduce the risk of fire and personal
injury, always relieve fuel system pressure before
servicing.
Proceed as follows:
NOTE: Perform all steps if checking fuel system
pressure. If only relieving fuel system pressure, perform
steps 1-7.
1. Turn Ignition OFF.
2. Loosen fuel filler cap to relieve fuel tank pressure.
Tighten filler cap after loosening.
3. Remove access cover. See Access Cover/Blower
Housing, Removal, steps 1-3.
4. Remove air cleaner assembly. See Air Cleaner
Assembly, Removal .
5. Pull out grey secondary lock and press to disconnect
fuel pump module connector.
6. Turn Ignition ON, Engine ON.
7. Start and run engine until it stalls. If it does not start,
crank engine a few times to relieve fuel system
pressure.
8. Obtain the following tools:
• Briggs & Stratton Fuel Pressure Gauge (Part No.
19627).
• Briggs & Stratton BIG BLOCK Fuel Pressure Test
Adapter (Part No. 19624).
Not for
Reproduction