Map/Mat Sensor; Ignition Coil; Fuel Filter; Mechanical Diaphragm Fuel Pump - Briggs & Stratton VANGUARD M490000 Repair Manual

MAP/MAT Sensor

Removal
1. Remove air cleaner assembly, static guard and
decorative cover. See Air Cleaner Assembly/Static
Guard/Decorative Cover/ Blower Housing, Removal,
steps 1-3.
2. Pull out red secondary lock and press latch to
disconnect MAP/MAT sensor connector.
3. Remove screw to release sensor bracket from
threaded boss on intake manifold.
4. Remove sensor from intake manifold.
Installation
1. Lightly lubricate O-ring of new sensor.
2. Install sensor into intake manifold.
3. Install screw to fasten sensor bracket to threaded
boss on intake manifold. Tighten screw to 50-60 lb-in
(6-7 Nm).
4. Connect MAP/MAT sensor connector. Push in red
secondary lock to secure.
5. Install decorative cover, static guard, and air cleaner
assembly. See Air Cleaner Assembly/Static Guard/
Decorative Cover/Blower Housing, Installation, steps
15-17.

Ignition Coil

Removal
1. See Air Cleaner Assembly/Static Guard/Decorative
Cover/Blower Housing, Removal.
2. Remove two hex flange screws to release ignition coil
from blower housing.
Installation
1. Install two hex flange screws to fasten new ignition
coil to blower housing. Alternately tighten screws to
20-35 lb-in (3-4 Nm).
2. See Air Cleaner Assembly/Static Guard/Decorative
Cover/Blower Housing, Installation.

Fuel Filter

Removal
1. Relieve fuel system pressure. See CHECK/RELIEVE
FUEL SYSTEM PRESSURE in this section.
2. Squeeze hose clip and remove fuel inlet hose from
fuel filter fitting.
NOTE: Wrap shop towel around fuel filter fittings to
catch any fuel leakage.
10
3. Squeeze hose clip and remove fuel outlet hose from
fuel filter fitting.
Installation
1. See Figure 10. With the arrow pointing in the direction
of fuel flow, install new fuel filter between fuel inlet
and outlet hoses.
2. Turn ignition switch ON for two seconds, and then
OFF for 10 seconds. Turn the ignition switch back to
ON and check for fuel leaks.

Mechanical Diaphragm Fuel Pump

Removal
1. See Figure 11. Squeeze hose clip at fuel inlet port (A)
and remove hose from fuel filter.
NOTE: Wrap shop towel around fittings to catch any
fuel leakage.
2. Squeeze hose clip at fuel outlet port (B) and remove
hose to fuel pump module.
3. Gently pull crankcase vacuum hose from pulse line
fitting (C).
4. Remove two hex flange screws to release fuel pump
from blower housing.
Installation
1. Orient new fuel pump with the crankcase vacuum
and fuel inlet ports pointing down.
2. Install two hex flange screws to secure fuel pump
to blower housing. Alternately tighten screws to
12-16 lb-in (1-2 Nm).
3. Squeeze hose clip and install hose from fuel filter
onto fuel inlet port (A).
4. Squeeze hose clip and install hose to fuel pump
module onto fuel outlet port (B).
5. Gently push crankcase vacuum hose onto pulse
line fitting (C). Be sure hose is not twisted after
installation.
6. Turn ignition switch ON for two seconds, and then
OFF for 10 seconds. Turn the ignition switch back to
ON and check for fuel leaks.
5
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