Cobra WT56B User manual

WT56B
COBRA WHEELED TRIMMER
OWNER'S MANUAL
GAOYOU NORTH POWER MACHINERY CO., LTD.
Henton & Chattell Ltd., London Road, Nottingham NG2 3HW UK

WT56B
WHEELED TRIMMER
OWNER'S MANUAL
2
WARNING:
For your own safety please read this manual before attempting to operate your new unit. Failure to follow instructions can result
in serious personal injury. Spend a few moments to familiarise yourself with your wheeled trimmer before each use. Keep this
manual in a safe place, so that the information is available at all times. If you give the equipment to any other person, hand over
these operating instructions and safety regulations as well.
CONTENTS
Registration ............................................................................................................................................................................................ 2
Warnings and Safety Precautions ........................................................................................................................................................3-6
Features ........................................................................................................................................................................................................... 7
Assembly .............................................................................................................................................................................................8-9
Operation ..........................................................................................................................................................................................9-10
Maintenance, Service and Storage ..................................................................................................................................................11-15
Maintenance .................................................................................................................................................................................... 11
Servicing and Adjustment ........................................................................................................................................................ 12-14
Storage............................................................................................................................................................................................. 15
Troubleshooting.....................................................................................................................................................................15-16
Slope Guide................................................................................................................................................................................. 17
Illustrated Parts Breakdown ............................................................................................................................................................18-22
Warranty .............................................................................................................................................................................................. 23
MODEL AND SERIAL
NUMBER LOCATION
PRODUCT REGISTRATION
Please register your new Cobra Wheeled Trimmer online at www.cobragarden.co.uk or by post to Cobra Garden, London Road,
Nottingham NG2 3HW UK
The model and serial number is detailed on the plate at the rear of the machine as illustrated.

WT56B
WHEELED TRIMMER
OWNER'S MANUAL
3
WARNING
WARNING INDICATES A HAZARD WHICH, IF NOT AVOIDED, COULD RESULT IN DEATH OR SERIOUS INJURY
TO PERSONNEL AND/OR PROPERTY DAMAGE.
WARNINGSANDSAFETY PRECAUTIONS
Operator's Responsibility
Accurate assembly and safe and effective use of the machine is
the operator's responsibility.
• Read and follow all safety instructions.
• Carefully follow all assembly instructions.
• Maintain the machine according to directions and
schedule included inthis operator’s manual.
• Ensure that anyone who uses the machine is familiar
with all controls and safety precautions.
SpecialSafetyMessages
Your manual contains special messages to bring attention to
potential safety concerns, machine damage as well as helpful
operating and servicing information. Please read all the
information carefully to avoid injury and machine damage.
NOTE: General information is given throughout the
manual that may help the operator in the
operation or service of the machine.
IMPORTANT
INDICATES HELPFUL INFORMATION FOR PROPER
ASSEMBLY, OPERATION, OR MAINTENANCE OF
YOUR EQUIPMENT.
WARNING
YOU MUST READ, UNDERSTAND AND COMPLY
WITHALLSAFETYANDOPERATINGINSTRUCTIONS
IN THIS MANUAL BEFORE ATTEMPTING TO SETUP
AND OPERATE YOUR MACHINE.
FAILURE TO COMPLY WITH ALL SAFETY AND
OPERATING INSTRUCTIONS CAN RESULT IN LOSS
OF MACHINE CONTROL, SERIOUS PERSONAL
INJURY TO YOU AND/OR BYSTANDERS, AND RISK
OF EQUIPMENT AND PROPERTY DAMAGE. THE
TRIANGLE IN THE TEXT SIGNIFIES IMPORTANT
CAUTIONS OR WARNINGS WHICH MUST BE
FOLLOWED.
THIS SYMBOL POINTS OUT
IMPORTANT SAFETY INSTRUCTIONS
WHICH IF NOT FOLLOWED COULD
ENDANGERYOUR PERSONAL SAFETY.
CAUTION
CAUTION INDICATES YOUR EQUIPMENT CAN BE
DAMAGED IF THE SAFETY INSTRUCTIONS THAT
FOLLOW THIS SIGNAL WORD ARE NOT OBEYED.
Before Operating Engine:
WARNING
READ ENTIRE OPERATING AND MAINTENANCE INSTRUCTIONS FOR THIS PRODUCT AND THE
INSTRUCTIONS FOR THE ENGINE THAT POWERS THIS UNIT. FAILURE TO FOLLOW INSTRUCTIONS COULD
RESULT IN SERIOUS INJURY OR DEATH. OPERATE THE ENGINE ACCORDING TO THE SAFETY INSTRUCTIONS
OUTLINED HERE AND INSERTED THROUGHOUT THE TEXT. ANYONE WHO USES THIS PRODUCT MUST READ
THE INSTRUCTIONS AND BE FAMILIAR WITH THE CONTROLS.

WT56B
WHEELED TRIMMER
OWNER'S MANUAL
4
GENERALSafetyRules
• Read, understand, and follow all instructions on the
machine and in the manual(s). Be thoroughly familiar
with the controls and the proper use of the mower
before starting.
• Familiarize yourself with all of the safety and
operating decals on this equipment and on any of its
attachments or accessories.
• Do not put hands or feet near or under rotating parts.
• Only allow responsible individuals, who are familiar
with the instructions, to operate the mower.
• Thoroughly inspect the area where the machine
is to be used and remove all foreign objects. Your
equipment can propel small objects at high speed
causing personal injury or property damage. Stay
away from breakable objects, such as house windows,
automobile, greenhouses, etc.
• Keep the area of operation clear of all persons,
particularly small children, and pets.
• Wear appropriate clothing such as a long-sleeved
shirt or jacket. Also wear long trousers or slacks. Do
not wear shorts.
• Do not wear loose clothing or jewelry. They can get
caught in moving parts.
• Always wear safety goggles or safety glasses with side
shields when operating mower to protect your eyes
from foreign objects which can be thrown from the
unit.
• Always wear work gloves and sturdy footwear. Wear
footwear that will improve footing on slippery
surfaces. Leather work shoes or short boots work well
for most people. These will protect the operator’s
ankles and shins from small sticks, splinters, and other
debris.
• It is advisable to wear protective headgear to prevent
the possibility of being struck by small flying particles,
or being struck by low hanging branches, twigs,
or other objects which may be unnoticed by the
operator.
• Do not operate the mower without proper guards or
other safety protective devices in place.
• Use this equipment for its intended purpose only.
• See manufacturer’s instructions for proper operation
and installation of accessories. Only use accessories
approved by the manufacturer.
• Operate only in daylight or good artificial light.
• Do not operate product when fatigued or under the
influence of alcohol, drugs or other medication which
can cause drowsiness or affect your ability to operate
this machine safely.
• Never operate mower in wet grass. Always be sure of
your footing; keep a fi m hold on the handle and walk;
never run.
• Before each use, inspect the ON/OFF switch and
cable. Make sure that the cable is free and that the
lever is not damaged. Also check the cable linkage
running to the carburetor for kinks, loose fitting , and
obstructions. Verify that the control bail is working
properly.
• Stop the rotating mower head when crossing gravel
drives, walks, or roads. Wait for the cutting lines to
stop rotating.
• Watch for traffic when operating near, or when
crossing roads.
• Stop the engine (motor) whenever you leave the
equipment, before cleaning, repairing or inspecting
the unit, be sure the mower head and all moving
parts have stopped. Let the engine cool, disconnect
the spark plug wire and move it away from the spark
plug.
• If the equipment should start to vibrate abnormally,
stop the engine (motor), disconnect the spark plug
wire and prevent it from touching the spark plug.
Check immediately for cause. Vibration is generally a
warning of trouble.
• After striking a foreign object, stop the engine
(motor). Remove the wire from the spark plug. Inspect
the mower for damage. If damaged, repair before
starting and operating the mower.
• Never leave the mower unattended when the engine
is running. Remove the wire from the spark plug.
• Regularly inspect the mower. Make sure parts are not
bent, damaged or loose.
• Allow muffler and engine areas to cool before
touching. Never pick up or carry the mower while the
engine is running.
• Prolonged exposure to noise and vibration from
gasoline engine powered equipment should be
avoided. Take intermittent breaks and/or wear ear
protection from engine noise as well as heavy work
gloves to reduce vibration in the hands.
• Check local regulations for age restrictions on use of
this machine.
• If the noise or vibrations of the machine increase, stop
immediately and perform an inspection.
• The fuel used in this machine is considered extremely
flammable and should be handled with care. When
storing extra fuel be sure that it is in an appropriate
container and away from any fire hazards.

WT56B
WHEELED TRIMMER
OWNER'S MANUAL
5
SlopeOperation
Slopes are a major factor related to slip and fall accidents
which can result in severe injury. All slopes require extra
caution. If you feel uneasy on a slope, do not mow it. Do mow
across the face of slopes; never up and down. Do not mow
excessively steep slopes (maximum 15 degrees) or areas
where the ground is very rough. See the “Slope Guide” in the
back of this manual to check a slope. Exercise extreme caution
when changing direction on slopes.
Remove objects such as rocks, tree limbs, etc.
Watch for holes, ruts, or bumps. Tall grass can hide obstacles.
IMPORTANT NOTES:
Do not mow near drop-offs, ditches, or
embankments. The operator could lose footing or
balance.
Do not mow excessively steep slopes.
Do not mow on wet grass. Reduced footing could
cause slipping.
Children
Tragic accidents can occur if the operator is not alert to the
presence of children. Children are often attracted to the
mower and the mowing activity. Never assume that children
will remain where you last saw them.
• Keep children out of the mowing area and under the
watchful care of a responsible adult.
• Be alert and turn mower off if child en enter the area.
• Before and while moving backwards, look behind and
down for small children.
• Never allow children to operate the mower.
• Use extra care when approaching blind corners,
shrubs, trees, or other objects that may obscure
vision.
Service
• Use extra care in handling gasoline and other fuels.
They are flammable and vapors are explosive.
• Use only an approved container.
• Never remove gas cap or add fuel with the engine
running. Allow engine to cool before refueling. Do
not smoke while refueling.
• Fill fuel tank outdoors with extreme care. Never fill
fuel tank indoors or near appliances with pilot lights,
heaters, or other ignition sources. Replace fuel cap
securely. If fuel is spilled, do not start the engine but
move product and fuel container from area. Clean up
spilled fuel and allow to evaporate.
• Never store the machine or fuel container inside
where there is an open flame (such as a water heater),
or other ignition source.
• If the fuel has to be drained, this should be done
outdoors. The drained fuel should be stored in a
container specifically designed for fuel storage or it
should be disposed of carefully.
• Engines give off carbon monoxide, an odorless,
colorless, poison gas. Breathing carbon monoxide
can cause nausea, fainting or death. Always start and
run engine outdoors. Do not start or run engine in an
enclosed area, even if doors or windows are open.
• Never make adjustments or repairs with the engine
(motor) running. Disconnect the spark plug wire,
and keep the wire away from the plug to prevent
accidental starting (remove the ignition key if
equipped with an electric start). Always wear eye
protection when you make adjustments or repairs.
• Check the mower head and engine mounting bolts at
frequent intervals for proper tightness.
• Keep all nuts and bolts tight and keep equipment in
good condition. Check mounting hardware on mower
head every time you change mower line and prior to
eachuse.
• Never tamper with safety devices. Check their proper
operation regularly.
• When servicing or repairing the mower, do not tip the
machine over or up unless specifically instructed to
do so in this manual. Service and repair procedures
can be done with the mower in an upright position.
Some procedures will be easier if the machine is lifted
on a raised platform or working surface.
• To reduce fire hazard, keep mower free of grass,
leaves, or other debris build-up. Clean up oil or fuel
spillage. Allow mower to cool before storing.
• Stop and inspect the equipment if you strike an
object. Repair, if necessary, before restarting.
• Always disconnect spark plug wire before cleaning,
repairing, or adjusting.
• Do not change the engine governor setting or over-
speed the engine.
• Clean and replace safety and instruction decals as
necessary.
• To guard against engine over-heating, always have
engine debris filer mounted and clean.
• Inspect mower before storage. When not in use,
disconnect spark plug lead and store indoors in a dry
place locked or otherwise inaccessible to children.
• Use only original equipment or authorized
replacement parts.
• Never replace the cutting lines with metal parts.

WT56B
WHEELED TRIMMER
OWNER'S MANUAL
6
SAFETY DECALS AND WARNINGS
Pictured below are safety and hazard symbols on the unit or in
this manual. Before you operate your unit, learn and
understand the purpose for each symbol.
Hazard Symbols and Meanings
A: Warning!
B: Read Owner's Manual Before Operating Machine
C: Do Not Operate While Others Are Around
D: Remove Objects that Could Be Thrown By This Machine.
E: Never Operate Machine Up and Down Slopes, ALWAYS
Operate Mower Across Slopes
F: Be Aware of Moving and Rotating Parts
G: Wear Ear and Eye Protection At All Times
H: Do Not Service or Adjust Moving Parts Unless Engine is
stopped and Spark Plug Wire is Disconnected.
I: Direction of Rotating Mower Line
J: Toxic Fumes—Do Not Operate in Unventilated Areas
K: Hot Surfaces
L: Fire Hazards.
M. Do Not Use In Thunderstorms--For severe weather, stop
operation of this machine and seek shelter.
N. Team Lift - For your safety, always have at least two
people when lifting this machine.
O. Never Fit Metal Cutting Parts--Do not attach any metal
parts to the cutting head of this machine.
Should any of the safety labels become unreadable because
of being worn, faded, or otherwise damaged during the use of
your mower, please use the part number information provided
to order a replacement label.
Wheeled Trimmer
Mower Warning Decal

WT56B
WHEELED TRIMMER
OWNER'S MANUAL
7
FEATURES
Read this owner’s manual and safety rules before operating your mower. Take time to compare the following illustration with the
mower to familiarize yourself with the product and its controls. SEE FIGURE 1
For the Briggs & Stratton 750EX I/C
FIGURE 1: Wheeled Trimmer Features
1. UpperHandle
2. Mower Head Drive Lever - Engages rotation of
Mower Head.
3. Engine On/Offswitch
4. Fuel cap and fill port
5. Engine Recoil starter pull handle
LM073 Specifications:
Mower Line Diameter:
MowerLine Length:
4mm 0.155 inches
38cm 15 inches
6. Debris screen
7. Handle adjustment cam lever
8. Oil level indicator and filler port
9. Trimmer mowing line
10. Trimmer mower head
Mower Cutting Diameter: 56cm 22 inches
Wheel Diameter: 35cm 14in

8
WT56B
WHEELED TRIMMER
OWNER'S MANUAL
ASSEMBLY
Contents of Parts Bag
• Owner’s Manual
• Engine Manual
• Warranty Card
• Replacement Mower Line
• L-HandleAllenWrench
• Spark Plug Wrench
• Safety Goggles
To Remove the Mower from the Carton
1. Remove any of the loose parts in packaging, including
the parts bags, from the carton.
2. Remove the packing material positioned around the unit.
3 Cut down all four corners of the carton and lay the side panels
flat.
4. Pull the mower out of the carton. SEE FIGURE 2
How to Raise the Handle
1. Hold the handle with one hand and loosen both handle
adjustment cams until the ratchet teeth are disengaged.
Do not remove the handle adjustment levers.
2. Raise the handle to the operating position.
3. Stand in the operator’s position behind the mower. Put
the handle in a comfortable position. Make sure both
sides of the handle are level.
NOTE: Make sure the cables are not caught between the
upper and lower handle.
4. Tighten the handle adjustment levers. Make sure the
handle pivots are locked in place.
NOTE: The handle height is adjustable. See “How To
Adjust The Height Of The Handle” in the Service
and Adjustment section.
5. To attach the recoil start handle to the rope guide, twist
the rope through the rope guide mounted on the right
side of the handle. SEE FIGURE 3.
6. Check mower head. Make sure no more than 1" of line
is exposed out of the outfeed hole. If longer than 1" it
is possible to have line thrown out of head early. SEE
FIGURE 10 (PAGE 12)
FIGURE 2: Your Wheeled Trimmer as it is shipped to you.
WARNING
USE THE CORRECT PERSONAL PROTECTION.
WEAR SAFETY GLASSES OR EYE SHIELDS WHILE
ASSEMBLING OR OPERATING THE STRING
MOWER.
REMOVE SPARK PLUG WIRE FROM SPARK
PLUG BEFORE DOING ANY ASSEMBLY OR
MAINTENANCE TO THE STRING MOWER.
FIGURE 3: Adjusting the Handle Bars.

9
WT56B
WHEELED TRIMMER
OWNER'S MANUAL
19444-0012r1
WARNING
• FOLLOW THE ENGINE MANUFACTURER’S
INSTRUCTIONS FOR THE TYPE OF
GASOLINE AND OIL TO USE.
• ALWAYS USE A SAFETY GASOLINE
CONTAINER. DO NOT SMOKE WHEN
ADDING GASOLINE TO THE ENGINE.
• WHEN INSIDE AN ENCLOSURE, DO NOT
FILL WITH GASOLINE. BEFORE YOU ADD
GASOLINE, STOP THE ENGINE. LET THE
ENGINE COOL FOR SEVERALMINUTES.
ENGINE PREPARATION
See the engine manufacturer’s instructions for the type of
gasoline and oil to use. Before you use the unit, read the
information on safety, operation, maintenance, and storage.
Note: Engine does not contain OIL or GASOLINE when
shipped from the factory. You must service the
engine before operation.
Fill Crankcase With Oil
1. Remove the oil dipstick. Fill the crankcase to the FULL
line on dipstick. DO NOT OVERFILL. SEE FIGURE 4
2. Install the oil dipstick and tighten securely.
Fill Fuel Tank With Gasoline
See the engine manufacturer’s instructions for the type of
gasoline to use.
OPERATION
How to Stop the Mower Head
Release the control bail. It will return to its open position and
disengage the mower head.
How to Stop the Engine
Set the ON/OFF switch to the OFF position.
How to Use the Mower Head Drive Lever
1. To engage the mower head, hold the control bail against
the handle. The faster the engine runs, the faster the
mower head will rotate. SEE FIGURE 5
2. Once the mower head is rotating, push the mower forward
to mow.
FIGURE 5: Using The Mower Head Drive Lever.
Oil Dipstick
Oil Fill Spout
WARNING
BE CAREFUL AROUND MOVING PARTS. THE
MOWER HEAD WILL CONTINUE TO ROTATE FOR
SEVERAL SECONDS AFTER THE ENGINE HAS
STOPPED.
Upper Level
Lower Level
FIGURE 4: Filling Engine with Fuel and Oil.
CAUTION
• IMPROPER TREATMENT OF THE TRIMMER
MOWER CAN DAMAGE IT AND SHORTEN ITS
LIFE.
• DO NOT ATTEMPT TO CRANK OR START THE
ENGINE BEFORE IT HAS BEEN PROPERLY
SERVICED WITH THE RECOMMENDED OIL.
THIS MAY RESULT IN AN ENGINE FAILURE.

10
WT56B
WHEELED TRIMMER
OWNER'S MANUAL
Engine Throttle Control
1. The engine throttle speed is a factory setting. It is
designed to ensure proper speed of your trimmer
mower during all operating conditions.
Briggs & Stratton 750EX Engine Ready start
Provides simple and easy to use starting without having to
prime the engine.
NOTE: Your engine will smoke the first time it is started. It
is burning off the protective coating that is on the
internal engine parts.
1. Before each use, remove debris from the debris screen.
SEE FIGURE 1 IN "FEATURES" SECTION. Debris can
cause the engine to overheat. Wipe the debris screen
with a cloth or paper towel.
2. Set ON/OFF Switch to ON.
3. To start a cold engine, push the primer bulb fi e times.
Wait two seconds between each push of the primer bulb.
-With Briggs & Stratton 750EX no need to prime.
4. Firmly hold the recoil starter handle with your right hand.
5. Pull back sharply on the recoil starter handle.
NOTE: Do not allow the starter rope to snap back. Let the
starter rope slowly rewind as you hold the recoil
starter handle.
Mower Tips:
WARNING
• DO NOT LEAVE TRIMMER MOWER
UNATTENDED WHILE ENGINE IS RUNNING.
WAIT FOR THE MOWER LINES TO STOP
ROTATING.
• NEVER RUN THE ENGINE INDOORS OR IN A
POORLYVENTILATED AREA. ENGINE
EXHAUST CONTAINS CARBON MONOXIDE,
AN ODORLESS AND DEADLY GAS.
KEEP HANDS, FEET, HAIR AND LOOSE
CLOTHING AWAY FROM THE MOWER AND
ANY MOVING PARTS ON THE ENGINE.
AVOID TOUCHING THE MUFFLER AND
SURROUNDING AREAS. TEMPERATURES
MAY EXCEED 150 DEGREES FAHRENHEIT.
• DEBRIS SUCH AS STICKS, GRAVEL OR
ROCKS CAN BETHROWN WITHSUFFICIENT
FORCE TO CAUSE PERSONAL INJURY OR
PROPERTY DAMAGE.
• If the weeds or grass are tall and thick, operate the mower at a slower walking speed.
• Frequently clean the underside of the mower to remove any grass build up. See the "Maintenance, Service and Storage"
section for details.
• For best results and longer lasting line, use the ends of the line to do the cutting. This is easily done by moving slowly
through very thick or heavy weeds.
• If the mower lines become too short, it will take longer to complete the job. If the mower lines are worn to less than half
their original length, change to a new mower line. See more on how to replace the mower line in the "Maintenance, Service
and Storage" section.
• Do not mow on excessively steep slopes. If a slope is difficult to stand on, do not mow. Do not mow on slopes when the
ground is slippery or wet. Mow across the face of a slope, not up and down.
• Mower head contact to concrete, asphalt and harder surfaces may create premature wear to the height guide.

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WHEELED TRIMMER
OWNER'S MANUAL
MAINTENANCE, SERVICE, AND STORAGE
NOTE: Maintenance, replacement or repair of the emissions control devices and systems may be performed by any non-
road engine repair establishment or individuals. However, items must be serviced by an authorized dealer to obtain
"no charge" emissions control service. Good maintenance is essential to help reduce air pollution and for safe,
economical and trouble-free operation.
Maintenance Schedule
ServiceRecords Before Each Use Every 25 Hours As Noted Service Date
Check engine oil level x
Check mower lines x 1
Check mower head engagement x
Engine/machine cleaning x 2
Check nuts and bolts x
Check spark plug x
Change engine oil* x
Service air filer* x 3
Lubricate wheel bearings
x
Note 1 - When old line is half the original length, replace with new line.
Note 2 - Clean daily if used in extremely dusty or dirty conditions.
Note 3 - Change more often if used in extremely dusty or dirty conditions.
*To service the air filter and change the oil in the LM073 model, use the wheel pivot to clear the air cleaner. On
models
without wheel pivot, it may be necessary to remove the wheel.
General Recommendations
The warranty on this mower does not cover items that have been subjected to operator abuse or negligence. To receive full value
from the warranty, the operator must maintain the mower as instructed in this manual.
Some adjustments must be made periodically to properly maintain your mower. All adjustments in the "Service and Adjustments"
section of this manual must be checked at least once each season.

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WT56B
WHEELED TRIMMER
OWNER'S MANUAL
0022r1
SERVICEANDADJUSTMENT
How to Change Engine Oil
Be sure the engine is not operating and is located on a level
surface before checking or refilling oil. Engine should be warm
for easy removal ofoil.
1. Detach spark plug wire and move away from spark plug.
If the engine uses a battery, disconnect at negative
terminal.
2. Remove dipstick and carefully tip the engine toward the
dipstick side to empty oil from oil fill area. Empty oil into
a suitable oil container and dispose of oil properly. SEE
FIGURE 7
3. Tip engine back onto a level surface and fill with
appropriate oil to the top of the marking on the dipstick
(SEE FIGURE 8). DO NOT OVERFILL. For proper oil
capacity andspecification, see the engine manufacturer's
instructions.
4. Reinsert dipstick and tighten.
How to Replace the Mower Line
For the best performance, use a heavy gauge (0.155” (4 mm)
diameter) mower line. Cut the length of the mower line to 15"
(381 mm). Use the length guide, located on the shield, to make
sure the mower line is the correct length. Place one end of the
mower line at location "A" and bend it along the raised portion
of the shield. Cut line at location "B". SEE FIGURE 9
NOTE: Do not allow the length of the lines to vary more
than one inch. This is important to make sure the mower
head is balanced and does not vibrate.
To extend the life of the mower line, keep the
mower line moist. If not kept moist, the nylon
mower line will become dry and brittle. Keep extra
mower line in a can of water. The line will then stay
flexible and easy to change. A flexible line will also
last much longer.
1. Stop the engine. Wait for all moving parts to stop.
2. Remove the worn mower line from the line retainer
by pulling on exposed 1" line from outfeed hole.
SEE
FIGURE 10
3. Push one end of the new mower line through the
insertion hole in the head.
SEE FIGURE 10
4. Push the line in until approximately 1 " (25 mm) is exposed
on theoutfeed side.
WARNING
BEFORE YOU INSPECT, CLEAN OR SERVICE THE
MOWER,STOPTHE ENGINE. MAKE SURE THAT ALL
MOVING PARTS HAVE STOPPED. DISCONNECT
THEWIRE FROM THE SPARK PLUG.
OIL
DIPSTICK
FIGURE 7: Oil Dipstick Location.
OIL
DIPSTICK
OIL
FILL
SPOUT
UPPER OIL LEVEL
LOWER OIL LEVEL
FIGURE 8: Dipstick And Oil Levels.
FIGURE 9: Mower Line Measurement Guide
5. Repeat for each of the four locations.
Make sure the line length is the
same at all four locations.
OUTFEED HOLE
(SMALL OPENING)
FIGURE 10: Replace Mower Line
INSERT MOWER LINE
(LARGE OPENING)

13
WT56B
WHEELED TRIMMER
OWNER'S MANUAL
To Remove the Wheels
To detach the wheels, loosen the axle bolts and remove the
wheel.Reverse instructions to reattach tire.
SEE FIGURE 11
WARNING
BEFORE YOU SET THE HEIGHT OF THE CUT, STOP
THE ENGINE. WAIT FOR ALL MOVING PARTS
TO STOP. ALLOW THE ENGINE TO COOL AND
DISCONNECT THE SPARK PLUG WIRE.
How to Set the Height of the Cut
FIGURE 11: Removing the Wheels.
How to Adjust the Height/Angle of the Handle
The height of the cut can be set using three different height
bump heads. The recommended cutting height for the
average yard is two (2) inches. SEE FIGURE 13
1. Stop the engine. Wait for all moving parts to stop.
2. Grasp the bump head with your hand and rotate in the
direction of the arrows to the unlock position. Lift off
head.
NOTE: If the bump head is tight, a screw drive or similar
sized metal rod can be inserted in the bump head
holes to assist in removal.
3. Install alternate bump head and tighten in direction of
arrows to the lock position.
Use the cam levers on each side of the handle to adjust the
height of the handle. SEE FIGURE 12
1.
Hold the handle with one hand and open both cam levers
untilthe ratchet teeth are disengaged. Do not remove the
nuts.
2. Movethe handle up or down to the desired position, then
align the ratchet teeth. Make sure both sides of the handle
are level.
3. Tighten (lock) the lever.
BUMP
HEAD 1 1 INCH
HANDLE
LOCKED
OPEN
RATCHET
TEETH
BUMP
HEAD 2 2 INCH
CAM LEVER
FIGURE 12: Adjusting The Height Of The Handle. (Lever shown in
OPEN position) FIGURE 13: Setting The Height Of Your Cut With Bump Heads.

14
WT56B
WHEELED TRIMMER
OWNER'S MANUAL
WARNING
BEFORE YOU REMOVE THE DRIVE BELT,
DISCONNECTTHE WIRE FROMTHE SPARK PLUG.
IMPORTANT
TEST THE DRIVE SYSTEM. START THE ENGINE AND
ENGAGE AND DISENGAGE THE MOWER HEAD
SEVERALTIMES.WHENDISENGAGED,MAKESURE
THE MOWER HEAD COMPLETELY STOPS WHEN
RESTING ON THE GROUND. IF THE MOWER HEAD
CONTINUES TO ROTATE, TAKE THE MOWER TO AN
AUTHORIZED SERVICE CENTER.
How to Replace the Drive Belt
To replace the drive belt, the mower head and shield must be
removed as follows: SEE FIGURES 14 AND 15
1. Remove the two screws that hold the rear of the shield to
the mower housing.
2. Remove the four bolts that hold the front of the shield
and mower head to the mower housing.
3. Raise the front of the mower housing and remove the
drive belt.
4. Remove the “V” pulley from the idler bracket.
FIGURE 14: Mower Head Housing and Shield
“V” PULLEY
DRIVE
NOTE: On some models, it is necessary to loosen the
mounting bolt for the drive pulley to remove the
drive belt . Do not bend the belt guides. Use only
OEMreplacementbelts.
5. To assemble the drive belt, reverse the above steps. Make
sure all fasteners are tight. Make sure the mounting bolt
for the drive pulley is tight.
6. Check the routing of the drive belt. Make sure the drive
belt is inside of all belt guides as shown.
BELT
RETURN
SPRING
MOUNTING
BOLT
DRIVE
PULLEY
BELT
GUIDES
FIGURE 15: Routing The Drive Belt

15
WT56B
WHEELED TRIMMER
OWNER'S MANUAL
STORAGE
When the mower is put in storage for thirty days or more,
follow the steps below to make sure the mower is in good
condition the following season.
Mower:
Completely Clean The Mower
Remove and discard line or store in a sealed container. Put the
mower in a building that has good ventilation.
NOTE: A yearly check-up or tune-up at an authorized
service dealer will ensure that the mower will
provide maximum performance for the next
season.
Engine:
IMPORTANT NOTE:
It is important to prevent gum deposits from
forming in fuel system parts such as the
carburetor, fuel filter, fuel hose, and tank during
storage. Also, using alcohol blended fuels (called
gasohol, ethanol or methanol) can attract
moisture which leads to separation and formation
of acids during storage. Acidic gas can damage
the fuel system of an engine while in storage.
1. Drain all gasoline from the fuel tank. Let the engine run
until it is out of gasoline. If you do not want to remove
gasoline, add a fuel stabilizer to any gasoline left in the
tank. A fuel stabilizer will minimize the formation of gum
deposits and acids. If the tank is almost empty, mix the
fuel stabilizer with fresh gasoline in a separate container
and add the mixture to the tank. Always follow the
instructions on the stabilizer container. Run the engine
at least ten minutes after stabilizer is added to allow the
mixture to reach the carburetor.
2. Drain the oil from a warm engine. Fill the engine crankcase
with new oil.
3. Remove the spark plug from the cylinder. Pour one ounce
of oil into the cylinder. Slowly pull the recoil starter
handle so that the oil will protect the cylinder. Install a
new spark plug in the cylinder.
4. Completely clean the mower, including dirt and debris
from the cylinder cooling fins and the engine housing.
5. When not in use, disconnect spark plug lead and store in a
well-ventilated area inaccessible to children.
WARNING
DO NOT REMOVE GASOLINE WHILE INSIDE A
BUILDING, NEAR A FIRE, OR WHILE YOU SMOKE.
GASOLINE FUMES CAN CAUSE AN EXPLOSION OR
A FIRE.
TROUBLESHOOTING & REPAIR
For service and warranty matters contact your local Cobra
dealer:
www.cobragarden.co.uk
Tel [phone]
Cobra Garden, London Road, Nottingham NG2 3HW

16
WT56B
WHEELED TRIMMER
OWNER'S MANUAL
TROUBLESHOOTING GUIDE
Trouble Cause Correction
Engine does not start Spark plug wire disconnected Connect spark plug wire
Engine not primed Prime engine
Defective or incorrectly gapped spark plug Inspect or replace spark plug
Fuel tank empty Add fuel
Dirty carburetor or fuel line Clean carburetor or fuel line
Dirty air filer Replace air filer
Carburetor out of adjustment For carburetor adjustment, take the unit to an
authorized service center
Engine floode Wait several minutes before starting
ON/OFF Switch in incorrect position Move Switch to ON position
Stale gasoline Drain old gasoline and add fresh gas
Defective ON/OFF Switch or wire Inspect and replace damaged parts
Engine runs poorly Bad spark plug Replace spark plug
Dirty air filer Replace air filer
Carburetor out of adjustment For carburetor adjustment, take the unit to an
authorized service center
Stale gasoline Drain old gasoline and add fresh gas
Engine cooling system clogged Clean debris screen and engine cooling fin
Engine overheats Engine cooling system clogged Clean debris screen and engine cooling fin
Carburetor out of adjustment For carburetor adjustment, take the unit to an
authorized service center
Oil level is low Add oil
Engine will not stop
running
ON/OFF Switch failed
Inspect and replace damaged parts
Wire disconnected from ON/OFF Switch Inspect, repair, or replace damaged parts
Poor Mower
performance
Mower line length is too short Correct line length is 15 inches.When the line is less
than 1/2 of this length, replace the line.
Mower vibrates Mower line lengths are substantially
different
Adjust mower line to approximately equal lengths
Loose nuts or bolts Check all bolts and nuts, including engine bolts
Broken mower head Replace broken part
Mower head does not
retain line
Mower Head Chassis Dirty Clean mower head
Broken line retainer Replaceline retainer
Mower line not correct size Use a 0.155" (4mm) diameter mower line
NOTE: Please see the engine manual for a full troubleshooting guide for any engine issues.

17
WT56B
WHEELED TRIMMER
OWNER'S MANUAL
SLOPE GUIDE
Use this guide to determine slope angle. Do Not mow on a
slope greater than 15 degrees.
• A 10 degree slope is a hill that increases in height at
approximately 1.76 feet (53.6 CM) in 10 feet (304.5
CM).
• A 15 degree slope is a hill that increases in height at
approximately 2.68 feet (81.7 cm) in 10 feet (304.5
cm).
WARNING
USE EXTREME CARE AT ALL TIMES AND AVOID
SUDDEN TURNS OR MANEUVERS. FOLLOW
OTHER INSTRUCTIONS IN THIS MANUAL FOR
SAFETY IN MOWING ON SLOPES. OPERATE A
MOWER ACROSS THE FACE OF SLOPES, NEVER
UP OR DOWN SLOPES. USE EXTRA CARE
WHEN OPERATING ON OR NEAR SLOPES AND
OBSTRUCTIONS.

WT56B
WHEELED TRIMMER
OWNER'S MANUAL
WARRANTY
This product is warranted in accordance with legal regulations for a 24 month period effective from the date of purchase
by the first user.
This product will not be covered if used in a commercial application.
This warranty covers all material or production failures, it does not include: defects from normal wear and tear, parts such
as, bearings, brushes, cables, air cleaning elements, brake pad, clutch disc, tyre, wheel, recoil starter rope, belts, cutter
blades, plugs, lubricant oils and grease or accessories. Damage or defects resulting from abuse, accidents or alterations,
natural fading of painted or plated surfaces, sheet peeling and other natural deterioration.
Any damage that occurs from the use of non-genuine Cobra parts will not be covered.
We reserve the right to reject any claim where the purchase cannot be verified or when it is clear that the product was not
maintained properly. (Clean ventilation slots, carbon brushes and serviced regularly)
Expenses incidental to the warranty claim that are not covered;
-Compensation for loss of time, commercial loss or rental costs of substitute product.
-Costs incurred for transportation to and from the dealership.
Any damage that occurs from the following will not be covered; exposure of the product to smoke and soot, chemical
agents, bird droppings or other animal waste, seawater, sea breeze, salt or other environmental phenomena.
Any damage resulting from operating methods other than those indicated in the owner’s manual will not be covered.
Your purchase receipt must be kept as proof for date of purchase. Your un-dismantled mower must be returned to your
dealer in an acceptably clean state, accompanied by your proof of purchase.
Please Register Your Mower
If your dealer did not collect registration information from you, please take a few minutes and register your purchase with
Cobra.
You can register by completing and mailing the registration card that should be in the box or by going online to
www.cobragarden.co.uk and clicking on Product Registration.
Before using the lawn mower, all mower operators must read this manual
ENVIRONMENT
Should your machine need replacement after extended use, do not put it in the domestic waste but dispose of it in an
environmentally safe way.
23

WT56B
WHEELED TRIMMER
OWNER'S MANUAL
EC DECLARATION OF CONFORMITY