Operator`s manual

CUSTOMER RESPONSIBILITIES
g ARNINGBeforeinspecting,cleaningor servicingthe unit, shut off engine, wait for all t ,,-..
partsto come to a completestop, disconnectspark plugwire and movewire away from spark
plug. Failure to follow these instructions can result in serious personal injury or
propertydamage.
A'irCleanerService
The engine air cleaner filters dirt and
dust out of the air before it enters the
carburetor. Operating the engine
with a dirty, clogged air filter can
cause poor performance and dam-
age to the engine. Never operate
the engine without the air cleaner in-
stalled. Inspect and service the air
cleaner more often if operating in
• very dusty or dirty conditions.
The air cleaner assembly is
equipped with a foam filter and an
inner paper filter. Service the filters
according to the "Required Mainte-
nance Schedule" on Page 22.
ToServiceFilters:
Base Inner Outer Cover
Plate Paper Foam andWing
Filter Filter Nut
Figure4-6:Aircleanercomponents.
Outer Foam Filter--
• Wash in water and detergent solu-
tion and squeeze until all dirt is re-
moved.
• Rinse thoroughly in clear water.
• Wrap in a clean cloth and squeeze
until 'completely dry.
• Do not oil the foam filter.
Inner Paper Filter--DO NOT
ATTEMPT TO CLEAN OR OIL THIS
FILTER.
• Replace annually or every 30 oper-
ating hours (more often under very
dusty conditions).
To Remove and Install Filters:
1. Remove wing nut and cover.
2. Slide foam filter off paper filter.
3. Discard paper filter.
4. Clean inside of base and cover
thoroughly.
5. Install new paper filter on base.
e. Slide foam filter over paper filter.
7. Install cover and wing nut. Tight-
en wing nut securely.
SparkPlugService
Inspect and clean or replace the
spark plug after every 100 operating
hours or annually.
In some areas, local law requires us-
ing resistor spark plugs to suppress
ignition signals• If the engine was
originally equipped with a resistor
spark plug, use the same type for re-
placement.
To Service the Spark Plug
1. Clean area around spark plug.
2. Remove and inspect plug.
3. Replace plug if electrodes are pit-
ted, burned, or porcelain is
cracked. For replacement, use a
Champion RJ-17LM only. NOTE:
A resistor plug must be used for
replacement.
4. Check electrode gap with wire
feeler gauge and set gap at .030 if
necessary.
5. Install spark plug and tighten
securely.
SparkArresterScreenService
If the engine muffler is equipped with
a spark arrester screen, remove and
clean away any accumulated materi-
al on the screen. Check to see that
the screen is not burned through in
any places or damaged. Replace a
spark arrester screen if it is burned
through or damaged in any location.
EngineCleaning
The engine must be kept clean to
assure smooth operation and to pre-
vent damage from overheating. The
engine cooling fins (see Figure 4-6A)
should not be allowed to accumulate
any materials such as leaves, twigs,
or other debris. All inspections and
services must be done with the en-
gine shut off and cool to the touch•
CoolingFins
Figure4.6A:Keepcoolingfinsclean.
Carburetor/GovernorControl
Adjustments
The carburetor was adjusted at the
factory for best operating speed, if
an adjustment is needed, contact
your nearest Sears Service Center.
The governor controls the maximum
safe operating speed and protects
the engine and all moving parts from
damage caused by overspeeding.
Do not tamper with the engine gov-
ernor settings. Contact your nearest
Sears Service Center if a problem
exists.
WARNING
Operators shall not tamper
with the engine governor
settings on the machine;
the governor controls the
maximum safe operating
speed to protect the en-
gine and all moving parts
from damage caused by
overspeed. Authorizedser-
vice shall be sought if a
problem exists.
Throttle ControlAdjustment
If the engine does not respond prop-
erly to various throttle lever settings,
please contact your nearest Sears
Service Center for assistance.
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