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NOTE: U se the bottle a nd
spout saved from initial
use tomeasure
the
correct amount ofoil.
The topofthe label on
thebottle m easures
approximately
3.04 fl.oz.
(90 ml) (Fig. 22). Check
thelevel, See Checking
the Oil L evel. Ifthe level
islow, a dd asmall
amount ofoiland
recheck. Do not o verfill (Fig. 21).
5. Replace
the oil f illplug.
6. Reconnect
the spark plug b oot.
AIR FILTER MAINTENANCE
Fill Line
Fig. 22
m
]
_L_
ARNING:
To avoid serious personal injury, always turn the
unit off and allow it to cool before cleaning or maintaining it.
Cleaning
the Air Filter
Clean and re-oil the air filter every 10 hours of operation. It is an important
item to maintain. Failure to maintain the air filter properly can result in poor
performance
or can cause permanent damage to the engine.
1.
Open the air filter cover. Push
Air Fiffer Cover
the tab on the under side of
the cover inward. Then pull
the air filter cover out and up.
(Fig. 23).
2.
Remove the air filter
Air Fiffer
(Fig. 24).
3.
Wash the filter in detergent
and water. Rinse the filter
Tab
thoroughly and allow it to dry.
Fig. 23
4.
Apply enough clean SAE 30
motor oil to lightly coat the
Rack
Tabs
filter.
5.
Squeeze the filter to spread
and remove excess oil.
6.
Replace the filter (Fig. 24).
Air Filter
NOTE:
If operating the unit
without the air filter,
WILL VOID the warranty.
Locking Tab
7.
Reinstall the air filter cover.
Position the slots on the top
Fig. 24
of the air filter cover onto the tabs at the top of the back plate
(Fig. 23).
8.
Swing the cover down until the tab on the air filter backplate snaps into
place in the slot on the air filter cover (Fig. 23).
IDLE SPEED ADJUSTMENT
i _.
j WARNING:
The cutting attachment
may spin during idle speed j
adjustments.
Wear protective
clothing and observe all safety
instructions
to prevent serious personal injury.
The idle speed of the engine is adjustable. An idle adjustment
screw is
between the air filter cover and the engine starter housing (Fig. 25).
NOTE:
Careless adjustments
can seriously damage the unit. Aside from
idle speed, only 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 let it run at a high idle for a minute to warm up.
Refer to Starting/Stopping
Instructions.
2.
Release the throttle trigger and let the engine idle. If the engine stops,
insert a small phillips in between the Air Filter Cover and the Engine
Cover (Fig. 25). Turn the idle speed screw in, clockwise,
1/8 of a turn at
a time (as needed) until the engine idles smoothly.
NOTE:
The cutting attachment
Idle Adjustment
should not rotate when
Screw
the engine idles.
3.
If the cutting attachment
rotates when the engine
idles, turn the idle speed
screw counterclockwise
1/8
of a turn at a time (as
needed), to reduce idle
speed.
Fig. 25
Checking the fuel, cleaning the air filter, and adjusting the idle speed should
solve most engine problems. If not and any of the following are true have the
unit serviced by 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
ROCKER ARM CLEARANCE
I J_,
WARNING:
To avoid serious personal injury, always turn the
un t off and a ow it to cool before cleaning or maintaining
it.
i
This requires disassembly of the engine. If unsure or unqualified to perform this,
take the unit to a Sears or other qualified service dealer.
The engine must be cold when checking
or adjusting the valve clearance.
• This task should be performed inside, in a clean, dust free area.
1.
Remove the six (6) screws on the back of the engine cover with a Flat-
head or T-25 Torx screwdriver (Fig. 26).
2.
Disconnect the spark plug wire.
3.
Clean dirt from around the
View
of the
Rear
Engine
Cover
spark plug. Remove the spark
plug from the cylinder head by
turning a 5/8 in. socket
counterclockwise.
Screws
Screws
4.
Remove the engine cover
(Fig. 26).
5.
Clean dirt from around the
rocker arm cover. Remove
the screw holding the rocker
Fig. 26
arm cover with a large flat
blade screwdriver
or Torx T-
25 bit (Fig. 27). Remove the
Screw
---------_
rocker arm cover and gasket.
Rocker Arm
6.
Pull the starter rope slowly to
Cover
bring the piston to the top of
its travel, (known as top dead
Spark Plue!
center). Check that:
Hole
The piston is at the top of its
travel. This should be done by
looking into the spark plug hole.
(Fig. 27)
Fig. 27
Both rocker arms move freely,
Adjusting Nuts
and both valves are closed
If these statements
are not true,
INTAKE
repeat step 6.
7.
Slide the feeler gauge between
EXHAUST
the rocker arm and the valve
Rocker
return spring. Measure the
Arms
clearance between the valve
stem and rocker arm (Fig. 28).
Measure both the intake and
exhaust valves.
Fig. 28
The recommended
clearance for
Exhaust
Rocker Arm
Adjusting _-
_
/
both intake and exhaust is .003 -
Nut
_
,/
Feeler
.006 in. (.076 - 0.152 mm). Use a
c___=
Gauge
_
standard automotive
.005 in.
!
(0.127 mm) feeler gauge. The
feeler gauge should slide between
0.003-0.006
in.
the rocker arm and valve stem
(0.076-0.152 ram)
with a slight amount of resistance,
without binding. See Figures 28
and 29.
_
Valve Stem
8. If the clearance is not within
Fig. 29
specification:
a.
Turn the adjusting nut using a 5/16 inch (8 mm) wrench or nut driver
(Fig. 29).
To increase clearance, turn the adjusting nut counterclockwise.
To decrease clearance, turn the adjusting nut clockwise.
b.
Recheck both clearances, and adjust as necessary.
9.
Reinstall the rocker arm cover using a new gasket. Torque the screw to
20-30 inolb (2.2-3.4 Nora).
10. Check the spark plug and reinstall. See Replacing the Spark Plug.
11.
Replace the spark plug wire.
12.
Reinstall the engine cover. Check alignment of the cover before tightening
the screws. Tighten screws.
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