CAUSE
ACTION
Cutting attachment bound with grass
Stop the engine and clean cutting attachment
Cutting attachment out of line
Refill with new line
Line twisted when refilled
Remove and rewind the line
Not enough line is exposed
Push the bump knob and pull out line until 4 inches (102 mm)
of line is outside of the cutting attachment
3. If the engine appears to be idling too fast, turn the idle speed screw
counterclockwise
1/8 of a turn at a time (as
needed), to reduce idle speed.
Checking the fuel mixture, cleaning the air filter and adjusting the idle speed should solve most engine problems. If not
and all of the following are true:
• the engine will not idle
• the engine hesitates or stalls on acceleration
• there is a loss of engine power
Have the carburetor adjusted by an authorized service dealer.
REPLACING THE SPARK PLUG
Use replacement #
753-06193
, a
Champion RDJ8J
spark plug, or equivalent. The correct
air gap is
0.025 inch (0.635 mm)
. Remove the plug after every 25 hours of operation and
check its condition.
1. Stop the engine and allow it to cool. Grasp the plug wire firmly and pull it from the spark plug.
2. Clean around the spark plug. Remove the spark plug from the cylinder head by turning a 5/8-inch socket counterclockwise.
3. Replace a cracked, fouled or dirty spark plug. Set the air gap at
0.025 in. (0.635 mm)
using a feeler gauge (Fig. 28).
4. Install a correctly-gapped spark plug in the cylinder head. Tighten by turning the
5/8-inch socket clockwise until snug.
If using a torque wrench torque to:
110-120 in.•lb. (12.3-13.5 N•m)
Do not over tighten.
CLEANING
Use a small brush to clean off the outside of the unit. Do not use strong detergents. Household cleaners that contain
aromatic oils such as pine and lemon, and solvents such as kerosene, can damage plastic housing or handle. Wipe off
any moisture with a soft cloth.
STORAGE
• Never store a fueled unit where fumes may reach an open flame or spark.
• Allow the engine to cool before storing.
• Store the unit locked up to prevent unauthorized use or damage.
• Store the unit in a dry, well-ventilated area.
• Store the unit out of the reach of children.
LONG TERM STORAGE
If planning on storing the unit for an extended time, use the following storage procedure:
1. Drain all fuel from the fuel tank into a container with the same 2-cycle fuel mixture. Do not use fuel that has been
stored for more than 60 days. Dispose of the old fuel/oil mix in accordance to Federal, State and Local regulations.
2. Start the engine and allow it to run until it stalls. This ensures that all fuel has been drained from the carburetor.
3. Allow the engine to cool. Remove the spark plug and put 1 oz. (30 ml) of any high quality motor oil or 2-cycle oil
into the cylinder. Pull the starter rope slowly to distribute the oil. Reinstall the spark plug.
NOTE:
Remove the spark plug and drain all of the oil from the cylinder before attempting to start the unit after storage.
4. Thoroughly clean the unit and inspect it for any loose or damaged parts. Repair or replace damaged parts and
tighten loose screws, nuts or bolts. The unit is ready for storage.
REMOVING THE LINE
1. Rotate the bump knob clockwise until all line is
inside the cutting head (Fig. 12).
2. Using a flat-head screwdriver, insert the tip into
the line dimple and just under the exposed
portion of the line (Fig. 13)
3. Pull the line straight out until all line is removed
from the cutting head.
LINE INSTALLATION
Always use original equipment manufacturer 0.095
in. (2.41 mm) replacement line.
1. Align the arrows on the bump knob with the spool
cover eyelets, if they are not already (Fig. 14).
2. Using 16 ft. (3.2 m) of 0.095 in. (2.41 mm)
replacement line push both ends of the line
through the holes in the bump knob until they
protrude through the eyelets on both sides of the
cutting head. Continue pulling the line until
approximately 6 ft. (1.5 m) is visible from both
sides of the cutting head. (Fig. 15)
3. Hold the spool cover, turn the bump knob clockwise to wind the line around the spool until about 5 in. (12.7 cm) is
protruding from each side of the cutting head. (Fig. 12)
4. Start the unit and bump the cutting head on the ground until the desired cutting length is achieved. Excess line will
be trimmed off by the line blade.
NOTE:
If the cutting line ends are pulled into the cutting head or the line becomes twisted, refer to Removing the Line.
AIR FILTER MAINTENANCE
Cleaning the Air Filter
Clean and re-oil the air filter every 25 hours of
operation. It is an important item to maintain.
Failure to maintain your air filter properly can result
in poor performance or can cause permanent
damage to your engine.
1. Open the air filter cover. Push the locking tab
on the top of the cover inward, then pull the air
filter cover out and down. (Fig. 16).
2. Remove the air filter (Fig. 16).
3. Wash the filter in detergent and water (Fig. 17).
Rinse the filter thoroughly and allow it to dry.
4. Apply enough clean SAE 30 motor oil to lightly
coat the filter (Fig. 18).
5. Squeeze the filter to spread and remove excess
oil (Fig. 19).
6. Replace the filter (Fig. 18).
NOTE:
If the unit is operated without the air
filter, you will VOID the warranty.
7. Reinstall the air filter cover. Position the slots
on the bottom of the air filter cover onto the tabs at the bottom of the back plate (Figs. 18).
8. Swing the cover up until the tab on the air filter backplate snaps into place in the slot on the air filter cover (Fig. 18).
CARBURETOR ADJUSTMENT
The idle speed of the engine is adjustable. An idle adjustment screw is between the air filter cover and the engine
starter housing (Fig. 20).
NOTE:
Careless adjustments can seriously damage the unit. An authorized service dealer should make carburetor
adjustments.
Check Fuel Mixture
Old and/or improperly mixed fuel is usually the reason for improper unit performance. Drain and refill the tank with
fresh, properly-mixed fuel prior to making any adjustments. Refer to Oil and Fuel Information.
Clean Air Filter
The condition of the air filter is important to the operation of the unit. A dirty air filter will restrict air flow and change the
air/fuel mixture. This is often mistaken for an out of adjustment carburetor. Check the condition of the air filter before
adjusting the idle speed screw. Refer to Air Filter Maintenance.
Adjust Idle Speed Screw
If, after checking the fuel mixture and cleaning the air filter, the engine still will not idle, adjust the idle speed screw as follows:
1. Start the engine and run for one 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 into the idle
adjustment screw (Fig. 20). Turn the idle speed screw
clockwise
1/8 of a turn at a time (as needed) until the engine
idles smoothly.
Air Filter
Tab
Tab Lock
Fig. 16
Air Filter
Cover
CAUSE
ACTION
Engine overspeed protection engaged
Allow the engine to cool down for 10 minutes before
restarting.
4
MAINTENANCE AND REPAIR INSTRUCTIONS
WARNING:
The cutting attachment will spin during idle speed adjustments. Wear protective clothing
and observe all safety instructions to prevent serious personal injury.
WARNING:
Do not sand blast, scrape or clean electrodes. Grit in
the engine could damage the cylinder.
Fig. 22
0.025 in.
(0.635 mm.)
WARNING:
Never use metal-reinforced line, wire, chain or rope. These can break off and become
dangerous projectiles.
Fig. 20
Idle Adjustment Screw
MAINTENANCE AND REPAIR INSTRUCTIONS
CAUSE
ACTION
Old or improperly mixed fuel
Drain fuel tank and add fresh fuel mixture
Fouled spark plug
Replace or clean the spark plug
CAUSE
ACTION
Old or improperly mixed fuel
Drain fuel tank and add fresh fuel mixture
Cutting head bound with grass
Stop the engine and clean the cutting head
Dirty air filter
Clean or replace the air filter
CAUSE
ACTION
Empty fuel tank
Fill fuel tank with properly mixed fuel
Primer bulb wasn't pressed enough
Press primer bulb fully and slowly 10 times
Engine is flooded
With blue choke lever in position 3, squeeze the trigger
and pull the starter rope
Old or improperly mixed fuel
Drain fuel tank and add fresh fuel mixture
Fouled spark plug
Replace or clean the spark plug
CAUSE
ACTION
Air filter is plugged
Replace or clean the air filter
Old or improperly mixed fuel
Drain fuel tank and add fresh fuel mixture
Improper carburetor adjustment
Adjust according to the Carburetor Adjustments section
TROUBLESHOOTING
ENGINE WILL NOT START
ENGINE WILL NOT IDLE
ENGINE WILL NOT ACCELERATE
IF FURTHER ASSISTANCE IS REQUIRED, CONTACT AN AUTHORIZED SERVICE DEALER.
ENGINE LACKS POWER OR STALLS
MAINTENANCE SCHEDULE
Perform these required maintenance procedures at the frequency stated in the table. These procedures should also be
a part of any seasonal tune-up.
NOTE:
Some maintenance procedures may require special tools or skills. If you are unsure about these procedures
take your unit to any non-road engine repair establishment, individual or authorized service dealer.
NOTE:
Maintenance, replacement, or repair of the emission control devices and system may be performed by any
non-road engine repair establishment, individual or authorized service dealer.
WARNING:
To prevent serious injury, never perform maintenance or repairs with unit running. Always
service and repair a cool unit. Disconnect the spark plug wire to ensure that the unit cannot start.
FREQUENCY
MAINTENANCE REQUIRED
SEE
Before starting engine
Fill fuel tank with fresh fuel
p. 3
Every 10 hours
Clean and re-oil air filter
p. 4
Every 25 hours
Check spark plug condition and gap
p. 4
WARNING:
To avoid serious personal injury, always turn the unit off and allow it to cool before you
clean or service it.
ENGINE STOPS WHILE IN USE
Fig. 17
WARNING:
To avoid serious personal injury, always turn the unit off and allow it to cool before you
clean or service it.
Fig. 19
Fig. 18
Flat-Head
Screw Driver
Arrows
Trimmer
Line
Dimple
Eyelet
Trimmer line
Bump
Knob
Fig. 15
Fig. 14
Fig. 13
Fig. 12
CUTTING ATTACHMENT WILL NOT ADVANCE LINE
ELECTRIC STARTER AND POWER START BIT™ FEATURES
This unit is designed to be started with an optional electric starter or
Power Start Bit™ that are sold separately. If choosing to start the
unit using one of these features or have questions please contact
your local retailer or call
1-877-282-8684 U.S
, (
1-800-668-1238
Canada
), for more information and purchasing. You may also go to
www.cubcadet.com
or
www.cubcadet.ca
.
Electric Start Feature
OPERATING INSTRUCTIONS
NOTE:
Always keep the trimming line fully extended. Line release becomes more difficult when the cutting line gets shorter.
Each time the head is bumped, about 1 inch (25.4 mm) of trimming line releases. A blade in the cutting head shield will
cut the line to the proper length if any excess line is released.
For best results, tap the bump knob on bare ground or hard soil. If attempting a line release in tall grass, the engine may
stall. Always keep the trimming line fully extended. Line release becomes more difficult when the cutting line gets shorter.
NOTE:
Do not rest the Bump Head™ on the ground while the unit is running.
Some line breakage will occur from:
• Entanglement with foreign matter
• Normal line fatigue
• Attempting to cut thick, stalky weeds
• Forcing the line into objects such as walls or fence posts
TIPS FOR BEST TRIMMING RESULTS
• Keep the cutting head parallel to the ground.
• Do not force the cutting head. Allow the tip of the line to do the cutting, especially along walls. Cutting with more
than the tip will reduce cutting efficiency and may overload the engine.
• Cut grass over 8 inches (200 mm) by working from top to bottom in small increments to avoid premature line wear
or engine drag.
• Cut from right to left whenever possible. Cutting to the left improves the unit's cutting efficiency. Clippings are
thrown away from the operator.
• Slowly move the unit into and out of the cutting area at the desired height. Move either in a forward-backward or
side-to-side motion. Cutting shorter lengths produces the best results.
• Trim only when grass and weeds are dry.
• The life of the cutting line is dependent upon:
• Following the trimming techniques
• What vegetation is being cut
• Where vegetation is cut
For example, the line will wear faster when trimming against a foundation wall as
opposed to trimming around a tree.
DECORATIVE TRIMMING
Decorative trimming is accomplished by removing all vegetation around trees, posts, fences, etc..
Rotate the whole unit so that the cutting head is at a 30° angle to the ground (Fig. 11).
Fig. 10
Fig. 11
