Craftsman WEEDWACKER INCREDI.PULL 316.791700 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. 19).
5. Replace the oil fill plug.
6. Reconnect the spark plug boot.
AiR FILTER MAINTENANCE
Fill Line
Fig. 23
-- i
_L_ ARNING:
To avoid serious personal injury, always turn the
unit off and allow it to cool before cleaning or maintaining it.
Air Filter Cover
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
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. 25).
3. Wash the filter in detergent
and water. Rinse the filter
thoroughly and allow it to dry.
4. Apply enough clean SAE 30
motor oil to lightly coat the
filter.
5. Squeeze the filter to spread
and remove excess oil.
6. Replace the filter (Fig. 25).
Fig. 24
Air Filter
Tab
Fig. 25
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. 24).
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 _, I WARNING: The cutting attachment may spin during idle speed I
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 Idle Adjustment
the unit. Aside from idle Screw
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:
Fig. 26
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. 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
1. Remove the six (6) screws on
the back of the engine cover
with a Flat-head or T-25 Torx
screwdriver (Fig. 27).
2. Disconnect the spark plug wire. Fig. 27
3. Clean dirt from around the
spark plug. Remove the spark Screw --------_Q
plug from the cylinder head by
U
turning a 5/8 in. socket Rocker Arm
counterclockwise. Cover
4. Remove the engine cover
(Fig. 27). Spark Plua
5. Clean dirt from around the Hole
rocker arm cover. Remove
the screw holding the rocker
arm cover with a large flat Fig. 28
blade screwdriver or Torx T-
25 bit (Fig. 28). Remove the Adjusting Nuts
rocker arm cover and gasket.
6. Pull the starter rope slowly to INTAKE
bring the piston to the top of
its travel, (known as top dead EXHAUST
center). Check that: Rocker
• The piston is at the top of its Arms
travel. This should be done by
looking into the spark plug hole.
(Fig. 28) Fig. 29
Both rocker arms move freely, Exhaust Rocker Arm
and both valves are closed Adjusting ---- _ /
If these statements are not true, Nut
_-_d<__,/
Feeler
repeat step
6. _Gauge/
7. Slide the feeler gauge between _ j.
the rocker arm and the valve 0.003-0.006 in.
r
return spring. Measure the (0.078-0.152 ram)
clearance between the valve
stem and rocker arm (Fig. 30).
Measure both the intake and _ Valve Stem
exhaust valves. Fig. 30
The recommended clearance for both intake and exhaust is .003 - .006 in.
(.076 - 0.152 ram). Use a standard automotive .005 in. (0.127 mm) 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. 30).
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.