Advertisement
Available languages
Available languages
Fill Line
Fig. 22
Fig. 23
3.
Wipe up any oil residue on
the unit and clean up any oil
that may have spilled.
Dispose of the oil according
to Federal, State and local
regulations.
4.
Refill the crankcase
with
3.04 fl.oz. (90 ml) of SAE 30
SF, SG, SH oil.
NOTE:
Use the bottle and
spout saved from initial
oil fill to measure the
correct amount of oil.
The top of the label on
the bottle measures
approximately
3.04 fl.oz.
(90 ml) (Fig. 23). Check
the level, See Checking
the Oil Level. If the level
is low, add a small
amount of oil and
recheck.
Do not overfill
(Fig. 22).
5.
Replace the oil fill plug.
6.
Reconnect the spark plug boot.
2.
Release the throttle 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. 26). 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
should not rotate when 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.
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
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
View of the Rear Engine Cover
checking
or adjusting the valve
clearance.
,, This task should be performed
Screws
inside, in a clean, dust free area.
Screws
AIR FILTER MAINTENANCE
_[_
ARNING:
To avoid serious personal injury, always turn the
unit off and allow it to cool before cleaning or maintaining it.
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 the tab on the underside of the cover
inward. Then pull the air filter
cover out and up. (Fig. 24).
2.
Remove the air filter
(Fig. 25).
3.
Wash the filter in detergent
and water. Rinse the filter
Air Filter
thoroughly and allow it to dry.
4.
Apply enough clean SAE 30
motor oil to lightly coat the
Tab
filter.
Fig. 24
5.
Squeeze the filter to spread
and remove excess oil.
6.
Replace the filter (Fig. 25).
NOTE:
Operating the unit
without the air filter
WILL VOID the warranty.
7.
Reinstall the air filter cover.
Position the slots on the top
of the air filter cover onto the
Air Filter Cover
1.
3.
4.
5.
6.
Remove the six (6) screws on
the back of the engine cover
with a Flat-head or T-25 Torx
screwdriver
(Fig. 27).
Disconnect the spark plug wire.
Clean dirt from around the
spark plug. Remove the spark
plug from the cylinder head by
turning a 5/8 in. socket
counterclockwise.
Remove the engine cover
(Fig. 27).
Clean dirt from around the
rocker arm cover. Remove
the screw holding the rocker
arm cover with a large flat
blade screwdriver
or Torx T-
25 bit (Fig. 28). Remove the
rocker arm cover and gasket.
Pull the starter rope slowly to
bring the piston to the top of
its travel, (known as top dead
center). Check to see if:
The piston is at the top of its
travel. Check this by looking
into the spark plug hole.
(Fig. 29)
Both rocker arms move freely,
and both valves are closed
tabs at the top of the back
plate (Fig. 24).
Fig. 25
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. 24).
IDLE SPEED ADJUSTMENT
I _1
WARNING:
The cutting attachment
may spin during idle speed 1
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. 26).
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
Idle Adjustment
as follows:
Screw
1.
Start the engine and let it run
at a high idle for a minute to
warm up. Refer to
Starting/Stopping
Instructions.
Fig. 26
Rocker
Arm
Cover
Spark
Plug
Hole
Rocker
Arms
Fig. 28
Adjusting
Nuts
INTAKE
EXHAUST
If these statements
are not true,
repeat step 6.
7.
Slide the feeler gauge between
the rocker arm and the valve
return spring. Measure the
clearance between the valve
stem and rocker arm (Fig. 30).
Measure both the intake and
exhaust valves.
Fig. 30
The recommended
clearance for both intake and exhaust is .003 - .006 in.
(.076 - 0.152 rnm). Use a standard automotive
.005 in. (0.127 ram) feeler
gauge. The feeler gauge should slide between the rocker arm and valve stem
with a slight amount of resistance, without binding. See Figures 29 and 30.
8. If the clearance is not within 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 in'lb (2.2-3.4 N,m).
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.
Fig. 29
Exhaust
Rocker Arm
/
Fee,er
Gauge
./
0.003-0.006 in.
_
_
I_
(0.076-0.152 ram)
......
_
Valve Stem
Advertisement
