Section 5: Removal/Installation; Safety Precautions; Check/Relieve Fuel System Pressure For Model 490000; Check/Relieve Fuel System Pressure For Models 540000/610000 - Briggs & Stratton VANGUARD 810 EFI Repair Manual

104
Always observe the following safety precau-
tions before removing any fuel system compo-
nents.
CAUTION
:
• Wear proper eye protection.
• Relieve fuel system pressure.
• Be sure there is no open fl ame or poten-
tial ignition sources in the area.
• When removing a fuel hose or fi tting,
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 fi re extinguisher on
hand in case of emergencies.
Check/Relieve Fuel System Pressure
for Model 490000
CAUTION: The fuel in the fuel rail is
under high pressure. To avoid an uncon-
trolled discharge or spray of fuel, and to
reduce the risk of fi re and personal injury,
always relieve fuel system pressure before
servicing.
Proceed as follows:
NOTE: Perform all steps if checking fuel sys-
tem pressure. If only relieving fuel system
pressure, perform steps 1-5 and 9-11.
1. Turn Ignition OFF.
2. Loosen fuel fi ller cap to relieve fuel tank
pressure. Tighten fi ller cap after loosening.
3. Obtain Briggs & Stratton Fuel Pressure
Gauge (Part No. 19627).

Safety Precautions

4. Locate fuel pressure test port (Schrader
valve) on fuel pump module to fuel rail con-
nector.
5. 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
fi tting to catch any fuel leakage.
6. Turn Ignition ON to pressurize fuel system.
7. Note the reading of the fuel pressure
gauge. Fuel pressure should remain steady
at 38-43 psi (262-296 kPa).
8. Turn Ignition OFF.
9. Position the clear bleed tube in an ap-
proved 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.
10. Remove fuel pressure gauge from Schrad-
er 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
fi tting to catch any fuel leakage.
11. Install protective cap on Schrader valve.
Check/Relieve Fuel System Pressure
under high pressure. To avoid an uncon-
trolled discharge or spray of fuel, and to
reduce the risk of fi re and personal injury,
always relieve fuel system pressure before
servicing.

Section 5: Removal/Installation

for Models 540000/610000
CAUTION: The fuel in the fuel rail is