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WARNING:
To prevent serious injury, never perform
maintenance
or repairs with unit running. Always service and
repair a cool unit. Disconnect
the spark plug wire to ensure that
the unit cannot start.
MAINTENANCE
SCHEDULE
Perform these required maintenance
procedures at the frequency stated in
the table. These procedures should also be a part of any seasonal tune-up.
NOTE: Some maintenance procedures may require special tools or skills. If
unsure about these procedures take the unit to Sears or other qualified
service dealer. Call 1-800-4-MY-HOME®
for more information.
NOTE: Maintenance, replacement,
or repair of the emission control devices
and system may be performed by a Sears or other qualified service dealer.
Call 1-800-4-MY-HOME®
for more information.
NOTE: Please read the California/EPA
statement that came with the unit for a
complete
listing of terms and coverage for the emissions control devices,
such as the spark arrestor, muffler, carburetor, etc.
FREQUENCY
MAINTENANCE
REQUIRED
SEE
Before starting
Fill the fuel tank with fresh fuel mixture
p. 7
the engine
Every 10 hours
Clean and re-oil the air filter
p. 10
(every 5 hours in
vacuum mode)
Every 25 hours
Check the spark plug condition
and gap
p. 10
WARNING:
To avoid serious personal injury, always turn the
unit off and allow it to cool before cleaning or maintaining it.
WARNING:
Wear gloves to prevent injury when handling unit.
AiR FILTER MAINTENANCE
Cleaning the Air Filter
Failure to maintain your air filter properly
can result in poor performance or can
cause permanent damage to your engine.
Engine failure due to improper air filter
maintenance is not covered by the
product warranty.
1. To open the air filter cover, push the
locking tab on the left side of the
cover inward and pull the air filter
cover slightly out and to the right
(Fig. 18).
2.
Remove the air filter (Fig. 19).
3. Wash the filter in detergent and
water. Rinse the filter thoroughly and
allow it to dry.
4.
Lightly coat the filter with clean SAE
30 motor oil.
5. Squeeze the filter to spread and
remove excess oil.
6.
Replace the filter.
NOTE: Operating the unit without the air
filter will VOID the warranty.
7. To reinstall the air filter cover, position
the hooks on the right side of the air
filter cover into the slots at the right
side of the back plate (Fig. 19).
8. Swing the cover to the left and press
closed so the air filter cover tab
snaps into the slot on the back plate
(Fig. 20).
ltl
NH
®
® @
Locking
Tab
Air Filter Cover
Fig. 18
Sl_
slots
Air Filter
Back Plate
Fig. 19
I{I NH
® ® ®
LockingTab
Air Filter Cover
Fig. 20
iDLE SPEED ADJUSTMENT
,Rl
WARNING:
This unit will need to be running during idle speed
adjustment.
Wear protective clothing and observe all safety
instructions
to prevent serious personal injury.
Also, DO NOT set unit on any surface except a clean, hard area
while starting or performing
any adjustments.
Debris, such as
gravel, sand, dust, grass, etc., could be thrown by the blower
tube and damage property or cause serious injury to bystanders
or operator.
The idle speed of the engine is adjustable. An idle adjustment
screw is
between the air filter cover and the engine starter housing (Fig. 21).
NOTE: Careless adjustments
can seriously damage to the unit. A Sears or
other qualified service dealer should make carburetor adjustments.
If, after checking
the fuel and cleaning the air filter, the engine still will not
idle, adjust the idle speed screw as follows:
1. Start the engine and warm up
according to the Starting/Stopping
Instructions.
2.
Release the trigger and let the engine
idle. If the engine stops, insert a
small Phillips screwdriver
in between
the air filter cover and the engine
cover (Fig. 21). Turn the idle speed
screw in, clockwise,
1/8 of a turn at
a time (as needed) until the engine
idles smoothly.
Idle
A?J UreStw m erit
Fig. 21
Checking the fuel, cleaning the air filter, and adjusting the idle speed should
solve most engine problems. If not, and any of the following conditions
are
true, take the unit to a Sears or other qualified service dealer:
the engine will not idle
the engine hesitates or stalls on acceleration
there is a loss of engine power
REPLACING
THE SPARK PLUG
Use a replacement
part number 753-06193 or Champion®
spark plug
#RDJ7J. The correct spark gap is 0.025 in. (0.635 mm).
1. Stop the engine and allow it to cool.
2.
Grasp the plug boot firmly and pull the cap from the spark plug.
3.
Clean dirt from around the spark plug. Remove the spark plug from the
cylinder head by turning a 5/8 in. socket counterclockwise.
WARNING:
Do not sand blast, scrape or clean spark plug
electrodes. Grit in the engine could damage the cylinder.
4.
Replace cracked, fouled or dirty
spark plug. Set the spark gap at
0.025 in. (0.635 mm) using a feeler
gauge (Fig. 22).
5.
Install a correctly-gapped
spark plug
in the cylinder head. Turn the 5/8 in.
socket clockwise until snug.
If using a torque wrench, torque to:
110-120 in.olb. (12.3-13.5 N_rn)
Do not overtighten.
6.
Reinstall the spark plug boot.
Fig. 22
10
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