Specifications

FUEL SYSTEM
BLEEDING THE FUEL SYSTEM
If the engine cranks but fails to start or starts and then shuts
down, there may be
air in the fuel system. Use the following
procedure
to purge air from the fuel system.
1. Connect a fuel pressure gauge kit (Snap-On MT 3378) or
equivalent to the Schrader port
on the fuel cell.
A CAUTION: Follow the manufacturers
Instructions for the safe use of the pressure gauge
kit when purging high pressure fuel systems.
2. While holding the STOP switch in the prime (depress)
position, bleed the air from the fuel celL The fuel cell is
purged when no air bubbles are visible escaping from the
bleed line.
3. Remove the pressure gauge kit from the fuel cell and
connect
it to the Schrader valve at the throttle.
4. Open the valve
on the fuel pressure gauge line. Do not
prime system without the fuel gauge purge valve open
or
air can be forced back into fuel cell. If this happens,
repeat steps 1, 2, and 3
to remove trapped air from the
fuel cell.
/
/
FUEL CELL
(FUEL PUMP/FILTER)
FUEL FILTER
S. Repeat step 2, this time purging the air completely from
the throttle body. The pressure should
be 40psi in the
throttle body after purging the system.
NOTE: The system can develop 40psi without being fully
purged. The system is only fully purged when no bubbles
are visible in ihe purge line.
6. Remove the pressure gauge set, and cap all Schrader
valves.
7. Insure that all wire connections are secure and that there
are no leaks in
the, fuel system.
-'~onLE BODY
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PRESSURE
GAUGE
"SNAP-ON- TOOL" PROVIDES AN
EXCELLENT PRESSURE GAUGE KIT
FOR PRESSURE TESTING AND
BLEEDING SCHRADER TEST PORTS
BLEEDING THE FUEL SYSTEM
Engines & Genera~rs
15A