Craftsman INCREDI-PULL 316.791961 Operator's Manual page 8

NOTE: Use the bottle and
spout saved from initial
use 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.
AIR FILTER MAINTENANCE
WARNING:
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 per
the Maintenance Schedule. 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
the tab on the under side of
the cover inward. Then pull
the air filter cover out and up.
(Fig. 24).
2. Remove the air filter
(Fig. 24).
3. Wash the filter in detergent
and water (Fig. 25). Rinse the
filter thoroughly and allow it
to dry.
4. Apply enough clean SAE 30
motor oil to lightly coat the
filter (Fig. 26).
5. Squeeze the filter to spread
and remove excess oil (Fig. 27).
6. Replace the filter (Fig. 24).
NOTE: If 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
tabs at the top of the back
plate (Fig. 28).
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).
MAINTENANCE AND REPAIR INSTRUCTIONS
Fig. 22
Fill Line
Fig. 23
Air Filter Cover
Air Filter
Tab
Fig. 24
Fig. 25
Fig. 26
Fig. 27
Tabs
Back
Plate
Air Filter
Locking Tab
Fig. 28
IDLE SPEED ADJUSTMENT
WARNING:
The cutting attachment may spin during idle speed
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. 29).
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 screwdriver in between the air filter cover and the
engine cover (Fig. 29). 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
WARNING:
To avoid serious personal injury, always turn the
unit off and allow it to cool before cleaning or maintaining it.
This requires disassembly of the
engine. If unsure or unqualified to
perform this, take the unit to a Sears
or other qualified service dealer.
NOTE: Inspect the valve to
rocker arm clearance
with a feeler gauge per
the Maintenance
Schedule.
• 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. 30).
2. Disconnect the spark plug wire.
3. Clean dirt from around the
spark plug. Remove the spark
plug from the cylinder head by
turning a 5/8 in. socket
counterclockwise.
4. Remove the engine cover
(Fig. 30).
5. 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. 31). Remove the
rocker arm cover and gasket.
6. Pull the starter rope slowly to bring the piston to the top of its travel,
(known as top dead center). Check that:
• The piston is at the top of its travel. This should be done by looking into the
spark plug hole. (Fig. 31)
8
Idle Adjustment
Screw
Fig. 29
View of the Rear Engine Cover
Screws
Fig. 30
Screw
Rocker Arm
Cover
Spark Plug
Hole
Fig. 31
Adjusting Nuts
INTAKE
EXHAUST
Rocker
Arms
Fig. 32
Screws