Product Manual

CAUSE SOLUTION
8
C
LEANING INSTRUCTIONS
1. Stop the engine and wait for all moving parts to stop.
2. Allow the unit to cool.
3. Slacken the chain if it was retensioned at operating temperature
d
uring cutting work. The chain contracts as it cools down. If it is
n
ot slackened, it may damage the gearbox and bearings.
4
. Wipe the unit down with a damp cloth. Do not douse the unit with
w
ater. Do not use solvents or strong detergents. If preparing the
unit for long-term storage (three months or more), remove the
chain and guide bar, then clean the unit thoroughly with a damp
cloth. A firm-bristled, non-wire, brush can be used to remove
debris from the bar groove and assembly. When finished,
r
eassemble the unit. Refer to Removing/Replacing the Guide Bar
and Chain.
5
. Debris must be removed from the cylinder fins on a regular basis to reduce the risk of damage to the unit and
p
ersonal injury from fire. Use compressed air, at 40 PSI or lower, to blow debris from the cylinder fins (Fig. 54).
Always wear safety goggles/glasses when cleaning the cylinder fins with compressed air. Use a small wire brush to
dislodge stubborn debris. Do not use water or solvents on the cylinder fins. If there is a significant amount of debris
that remains after cleaning, have the cylinder fins cleaned by an authorized service dealer.
6. Spray the guide bar and chain with corrosion inhibiting oil.
S
TORAGE INSTRUCTIONS
NOTE: It is normal for oil to seep from the unit when it is not in use. Please take this into consideration when storing
the unit.
1. Follow the Cleaning Instructions listed above.
2. Attach the scabbard to the guide bar and chain.
3
. Store the unit in a dry, high and/or locked location, out of the reach of children and other unauthorized persons.
A
lways store the unit and fuel in a cool, well-ventilated space where fuel vapors cannot reach sparks or open
flames from water heaters, electric motors or switches, furnaces, etc. Never store the unit, with fuel in the tank,
inside a building where fumes may reach an open flame or spark.
L
ong-term Storage Instructions
I
n addition to the standard storage instructions described above,
perform the following steps when storing the unit for 30 days or more:
1. Drain the fuel tank by running the unit dry. Alternatively, tip the
e
ngine housing/fuel tank over to pour the fuel mixture into a
s
uitable container and then run the engine until it stops in order to
r
emove fuel from the carburetor.
2
. Allow the engine to cool.
3
. Remove the spark plug. Refer to Inspecting/Adjusting/Replacing
the Spark Plug.
4. Pour 1 teaspoon of clean 2-cycle oil into the combustion chamber
(
Fig. 55). Pull the starter rope slowly several times to coat the
i
nternal components.
5
. Replace the spark plug.
R
emoving a Unit From Long-term Storage
1
. Remove the spark plug.
2. Pull the starter rope briskly to clear excess oil from the combustion chamber.
3. Clean and gap, or replace, the spark plug.
4. Prepare the unit for operation.
WARNING:
D
o not let brake fluids, gasoline, petroleum-based products, penetrating oils, etc., come
in contact with plastic parts. These chemicals may damage, weaken and destroy plastic, which may
result in serious personal injury.
SPECIFICATIONS*
* All specifications are based on the latest product information available at the time of printing. We reserve the right
to make changes at any time without notice.
Engine Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Air-Cooled, 2-Cycle
D
isplacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 cc (3.11 cu in)
Idle Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,800 rpm
Operating Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8,500 rpm
I
gnition Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electronic
I
gnition Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Slide Switch
Starter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AST Starting Auto Rewind
Throttle Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Finger-Tip Trigger
Throttle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Manual Spring Return
Spark Plug Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.025 in (0.635 mm)
Carburetor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Diaphragm, All-Position
Muffler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Baffled with Guard
Drive Sprocket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-Tooth
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bar and Chain Oil
Bar Lube Reservoir Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 fl oz (443 ml)
Fuel/Oil Ratio. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40:1
Fuel Tank Capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 fl oz (532 ml)
Cutting Diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 in (91.4 cm)
Bar Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 in (45.7 cm)
Chain Pitch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .325 in (8.2 mm)
Chain Gauge. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.05 in (1.27 mm)
Approximate Unit Weight (no fuel) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17.5 lbs (7.9 kg)
CLEANING AND STORAGE
REPLACEMENT PARTS
Description
18-inch Chain
18-inch Guide Bar
Bar Lube Reservoir Cap
Bar-retaining Nuts
8 oz Bar and Chain Oil
Part #
753-06265 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
753-06264 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
753-06270 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
753-06271 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
753-06272 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
F
ig. 55
Fig. 54
Cylinder Fins
T
he carburetor mixture adjustment setting is incorrect
H
ave the carburetor adjusted by an authorized service
c
enter
T
he fuel mixture is incorrect Drain the fuel tank and add fresh, properly mixed fuel
T
he spark plug is incorrectly gapped
C
lean, gap or replace the spark plug
T
he spark arrestor screen is plugged Clean the spark arrestor screen
T
he air filter is dirty
C
lean or replace the air filter
The carburetor mixture adjustment setting is incorrect Have the carburetor adjusted by an authorized service
c
enter
T
he fuel is old and/or improperly mixed Drain the fuel tank and add fresh, properly mixed fuel
T
he air filter is plugged
C
lean or replace the air filter
T
he spark plug is fouled Clean, gap or replace the spark plug
T
he carburetor mixture adjustment setting is incorrect
H
ave the carburetor adjusted by an authorized service
c
enter
T
he air filter is plugged Clean or replace the air filter
T
he fuel is old and/or improperly mixed
D
rain the fuel tank and add fresh, properly mixed fuel
THE ENGINE HESITATES
T
he unit was started incorrectly
F
ollow all Starting and Stopping Instructions
The carburetor mixture adjustment setting is incorrect Have the carburetor adjusted by an authorized service
center
T
he spark plug is fouled
C
lean, gap or replace the spark plug
The fuel tank is empty Fill the fuel tank with properly mixed fuel
T
he primer bulb was not pressed enough
P
ress the primer bulb fully and slowly 10 times
T
he fuel filter is plugged
H
ave the fuel filter cleaned or replaced by an authorized
s
ervice center
The choke lever is in the wrong position Move the choke lever to Position 2
T
he spark arrestor screen is dirty
C
lean the spark arrestor screen
The air filter is dirty Clean the air filter
The carburetor mixture adjustment setting is incorrect Have the carburetor adjusted by an authorized service
center
The chain is dull Sharpen the chain
The chain is on backwards Reverse the direction of the chain
TROUBLESHOOTING
N
OTE: For repairs beyond the minor adjustments listed above, locate your nearest authorized service center by
c
alling the Customer Support Department at 1-866-206-2707 (U.S.) or 1-877-696-5533 (Canada).
T
he chain tension is too tight
A
djust the chain tension
T
he bar lube reservoir is empty Refill the bar lube reservoir
T
he guide bar groove and/or oil passages are dirty
C
lean the guide bar groove and oil passages
T
he oil flow from the automatic oiler to low Increase the oil flow from the automatic oiler
T
he chain tension is too tight
A
djust the chain tension
T
he guide bar and chain are assembled incorrectly Refer to Removing/Replacing the Guide Bar and Chain
T
he guide bar and chain are damaged
I
nspect the guide bar and chain for damage
T
he drive assembly is damaged
R
efer to Service Information
T
he chain brake is engaged
D
isengage the chain brake
T
HE CHAIN DOES NOT ROTATE WHILE THE ENGINE IS RUNNING
THE CHAIN ROTATES, BUT DOES NOT CUT
T
HE GUIDE BAR AND CHAIN ARE RUNNING HOT AND SMOKING OR STUCK
T
HE UNIT STARTS, BUT THE ENGINE HAS LOW POWER
T
HE UNIT WILL NOT START OR STARTS BUT DOES NOT CONTINUE TO RUN
T
HERE IS NO POWER WHEN THE UNIT IS UNDER LOAD
T
HE ENGINE RUNS ERRATICALLY
T
HE ENGINE SMOKES EXCESSIVELY