SPARK PLUG
A
spark plug with heavy combustion deposits can cause
the generator set to misfire, operate erratically, or stop
running when a load is applied. Remove the spark plug
and clean carbon and other deposits
off
with a wire
brush, then inspect and measure plug gap (Figure
4-4).
Plug gap measurements are listed in the Specifications
section.
If
a plug is discolored or badly fouled, replace it.
The spark plug is located behind the control panel on
5.0
to
6.0
kW Pro Models. If necessary, the fuel tank can
be raised for easier service access as follows:
Let the generator set cool down before servicing.
Checkfuel level in thefuel tankand reduce thelevel
if
tank is full to avoid spilling. Use
a
pump designed
for use with fuels to lower fuel tank level and store
fuel in a clean container designed for fuel storage.
Closethe fuel shutoff valve on the bottom of the fuel
tank (Figure
3-2).
Remove the fuel tank mounting nuts and raise the
control panel side of the fuel tank high enough to
access the spark plug. Support the fuel tank to pre-
vent tilting or dropping.
Do
not clean spark plug by
sandblasting. Deposits remain-
ing,on the plug can cause premature engine wear.
SPARK
PWG
GAP
(SEE
SPECIFICATIONS)
ES-1374
AGURE
4-4.
MEASURING SPARK
PLUG
GAP
MUFFLER
SERVICE
Inspect the muff ter for corrosion and physical defects.
Operate and generator set and check for exhaust leaks
and noisy operation. Replace a noisy or defective
muffler before operating the generator set
Models With SparkArrester:The
exhaust Spark Arres-
ter requires periodic cleaning for safe operation and to
maintain maximum efficiency. Consult the maintenance
schedule for recommended cleaning intervals. Allow
the generator set to cool down before servicing the
muffler.
Remove the spark arrester screen (Figure
44,
inspect
for damage, and replace
if
defective.To clean, lightly tap
the screen and clean any deposits with a wire brush.
Also
use a commercial solvent if necessary. Allow
screen to dry, then reassemble and attach securely.
4-4
Most part cleaning solvents are
flammable and misuse can result in
severe personal injury
or
death. Follow the manufac-
turer’s recommendations. Work in a well-ventilated
area and do not allow any spark, flame, pilot light,
cigarette,
or
other ignition source near the generator
set. Keep a fire extinguisherratedABC near workarea.
,
SPARK
ARRESTER
SCREEN
Exs-1152
FIGURE
4-5.
CLEANING
A
TYPICAL SPARK
ARRESTER
FUEL
FILTER
1-1
Fuel
presents
the hazard of fire
or
explosion fhatcan
muse
severeper-
sonal injury
or
death
Do
not
permit any flame,
spark,
pirot
Iighb
cigarette,
or
other ignition
source
near: the
iuel system.
kspeci
for
iuel leaks any time service is
performed
on
the iuel system. Keep a
fire
extinguisher
rated
ABC
near
work
area.
Clean or replace the fuel filter
at
the
interval
recom-
mended
in
the Maintenance Schedule or if performance
problems occur and bad fuel
is
suspected. Refer to
Figure
4-6.
Service fuel tilter on models
with
sediment bowl,
as
follows:
1.
2.
3.
4.
Turn the fuel supply valve to the closed position and
allow the set to operate until it runs out of fuel. Let
the generator set cool down before proceeding.
Unscrew the sediment bowl from the fuel supply
valve and clean
it.
4
Remove the screen and clean any dirt and particu-
late
off
the screen.
Reinstall the screen and sediment bowl. Attach the
fuel line securely to the fuel shutoff valve.
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