Ryobi RLT254CDSO User manual

ORIGINAL INSTRUCTIONS
Grass Trimmer
RLT254CDSO
RLT254SDSO
HERO SHOT
HERO SHOT TO
FOLLOW ONCE
AVAILABLE

Important!
It is essential that you read the instructions in this manual before assembling,
operating, and maintaining the product.
Subject to technical modification.

1
Safety, performance, and dependability have been given
top priority in the design of your grass trimmer.
INTENDED USE
The grass trimmer is intended to be used only by adults who
have read and understood the instructions and warnings
in this manual and can be considered responsible for their
actions. The product is only intended for use outdoors in a
well-ventilated area. For safety reasons, the product must
be adequately controlled by a two-handed operation.
The product is designed for cutting grass, light weeds,
and other similar vegetation at or about ground level.
The cutting plane should be approximately parallel to the
ground surface.
The product should not be used to cut or trim hedges,
bushes, or other vegetation where the cutting plane is not
or about ground surface level.
Do not use the product for any other purpose.
WARNING
To reduce the risk of injury, the user must read and
understand the operator’s manual.
WARNING
Do not attempt to operate the product until you
have read thoroughly and understood completely all
instructions and safety rules contained in this manual.
Failure to comply may result in accidents involving fire,
electric shock, or serious personal injury. Save the
operator’s manual and review frequently for continuing
safe operation and instructing others who may use the
product.
WARNING
The product is not intended to be used by children or
persons with reduced physical, mental, or sensory
capabilities. Children should be adequately supervised
to ensure they do not play with the product.
GENERAL SAFETY WARNINGS
■For safe operation, read and understand all instructions
before using the product. Follow all safety instructions.
Failure to follow all safety instructions listed below, can
result in serious personal injury.
■Some regions have regulations that restrict the use of
the product. Check with your local authority for advice.
■Do not allow children or untrained individuals to use the
product.
■Never start or run the engine in a closed or poorly
ventilated area; breathing exhaust fumes can kill.
■Clear the work area before each use. Remove all
objects such as rocks, broken glass, nails, wire, or
string that can be thrown or become entangled in the
string head.
■Wear full eye and hearing protection while operating the
product. If working in an area where there is a risk of
falling objects, head protection must be worn.
■Hearing protection may restrict the operator’s ability
to hear warning sounds. Pay particular attention to
potential hazards around and inside the working area.
■Wear heavy, long trousers, non-slip protective footwear,
and gloves. Do not wear loose fitting clothing, short
trousers, jewellery of any kind, or use with bare feet.
■Secure long hair so it is above shoulder level to prevent
entanglement in any moving parts.
■Keep all bystanders, children, and pets at least 15 m
away. Stop the product if anyone enters the area.
■Do not use the product when tired, ill, under medication,
or under the influence of alcohol and drugs.
■Do not use in poor lighting. The operator needs clear
unrestricted vision to identify potential hazards.
■Keep firm footing and balance at all times. Do not
overreach. Overreaching can result in loss of balance
or exposure to hot surfaces.
■Keep all parts of your body away from any moving part.
■Do not touch the area around the silencer or cylinder of
the product, these parts get hot from operation.
■Always stop the engine and allow it to cool down before
making any adjustments.
■Do not smoke when mixing the fuel or when filling the
fuel tank.
■Mix and store the fuel in a container that is approved
for fuel.
■Mix the fuel outdoors where there are no sparks or
flames. Wipe up any fuel spillage. Move 9 m away from
refueling site before starting engine.
■Stop the engine and allow it to cool down before
refueling or storing the product.
■Allow the engine to cool down; empty the fuel tank and
secure the product from moving before transporting in
a vehicle.
■Turn off the engine. Make sure all moving parts have
come to a complete stop:
●before servicing
●before clearing a blockage
●before checking, cleaning, and working on the
product
●before changing accessories
●after striking a foreign object
●whenever leaving the product unattended
●whenever performing maintenance
●whenever the product starts to vibrate abnormally
WARNING
Never use cutting means or attachments which are not
specified by RYOBI in this manual. This includes the
use of metal multi-piece pivoting chains and flail-blades.
These items are known to break up during use and
present a high risk of serious injury to the operator or
bystanders.
WARNING
Inspection after dropping or other impacts: Thoroughly
inspect the product and identify any problems or damage
to it. Any part that is damaged should be properly
repaired or replaced by an authorised service centre.

2
GRASS TRIMMER SAFETY WARNINGS
■Replace the string head if cracked, chipped, or
damaged in any way. Be sure the string head is
properly installed and securely fastened. Failure to do
so can cause serious injury.
■Avoid using on wet grass.
■Do not walk backwards when using the product.
■Walk, never run.
■The small blade fitted to the cutting attachment guard
is designed to trim the new extended line to the correct
length for safe and optimum performance. It is very
sharp; do not touch it, particularly when cleaning the
product.
■Always ensure that ventilation openings are kept clear
of debris.
■Before use and after any impact, check that there are
no damaged parts. Examine the cutting means for signs
of cracking or other damage. A defective switch or any
part that is damaged should be properly repaired or
replaced by an authorised service facility.
■Make sure the head attachment is properly installed
and securely fastened.
■Make sure all guards, deflectors, handles, bolts, and
fasteners are properly and securely attached.
■Do not modify the product in any way. This may
increase the risk of injury to yourself or others.
■Use only the manufacturer’s replacement line in the
cutting head. Do not use any other cutting attachment.
■Never use the product without the cutting attachment.
■Maintain a firm grip on both handles while trimming.
Keep string head below waist level. Never cut with the
string head located more than 76 cm above the ground.
TRANSPORTATION AND STORAGE
■Stop the engine and allow it to cool down before storing
or transporting.
■Clean all foreign materials from the product.
■Drain all fuel from tank into a container approved for
petrol. Remember to properly replace and tighten the
fuel cap.
■Run the engine until it stops, this will remove all fuel
that could become stale and leave varnish and gum in
the fuel system.
■Store the product in a cool, dry, and well-ventilated
place that is inaccessible to children. Keep away from
corrosive agents, such as garden chemicals and de-
icing salts. Do not store outdoors.
■When transporting the product in a vehicle, secure it
against movement or falling to prevent injury to persons
or damage to the product.
■Never carry or transport the product while the engine
is running.
■Abide by all government and local regulations for the
safety storage and handling of petrol.
Storage (1 month or longer)
■Drain all fuel from tank into a container approved for
fuel. Run engine until it stops.
■Clean all foreign material from the product. Store it in
a well-ventilated place that is inaccessible to children.
■Keep away from corrosive agents such as garden
chemicals and de-icing salts.
■Abide by all ISO and local regulations for the safe
storage and handling of fuel. Excess fuel should be
used in other 2-cycle engine powered equipment
Short term
■Stop the engine and allow it to cool down before storing.
■Clean all foreign material from the product.
■Store the product in a cool, dry, and well-ventilated
place that is inaccessible to children.
■Keep away from corrosive agents such as garden
chemicals and de-icing salts.
■Do not store outdoors.
MAINTENANCE
WARNING
Use only original manufacturer’s replacement parts,
accessories, and attachments. Failure to do so can
cause possible injury, contribute to poor performance,
and may void your warranty.
■Always stop the engine and allow it cool down before
making any maintenance.
■You may make adjustments and repairs described in
this manual. For other repairs, contact an authorised
service centre.
■Consequences of improper maintenance may include
excess carbon deposits resulting in loss of performance
and discharge of black lubricant residue dripping from
the silencer.
■For the replacement line, use only nylon filament line
of the diameter described in the specification table of
this manual.
■After extending the new cutter line, always return the
product to its normal operating position before starting.
■After each use, clean the product with a soft, dry cloth.
■Any part that is damaged should be properly repaired or
replaced by an authorised service centre.
■Check all nuts, bolts, and screws at frequent intervals
for proper tightness to ensure the product is in a safe
working condition.
RESIDUAL RISKS
Even when the product is used as prescribed, it is still
impossible to completely eliminate certain residual risk
factors. The following hazards may arise during use, and
the operator should pay special attention to avoid the
following:
■injury caused by vibration
–Hold the product by designated handles and restrict
working time and exposure.
■injury caused by exposure to noise
–Wear hearing protection and limit exposure.

3
■injury caused by flying debris
–Wear eye protection at all times.
RISK REDUCTION
It has been reported that vibrations from handheld tools
may contribute to a condition called Raynaud’s Syndrome.
Symptoms may include tingling, numbness and blanching
of the ngers, usually apparent upon exposure to cold.
Hereditary factors, exposure to cold and dampness, diet,
smoking and work practices are all thought to contribute to
the development of these symptoms. There are measures
that can be taken by the operator to possibly reduce the
effects of vibration:
■Keep your body warm in cold weather. When operating
the product, wear gloves to keep the hands and wrists
warm. It is reported that cold weather is a major factor
contributing to Raynaud’s Syndrome.
■After each period of operation, exercise to increase
blood circulation.
■Take frequent work breaks. Limit the amount of
exposure per day.
If you experience any of the symptoms of this condition,
immediately discontinue use and see your physician.
WARNING
Injuries may be caused, or aggravated, by prolonged
use of a tool. When using any tool for prolonged periods,
ensure you take regular breaks.
WHAT’S IN THE BOX
■Powerhead and upper boom assembly x 1
■Lower boom and string head assembly x 1
■Front handle assembly x 1
■Grass deflector x 1
■PRO CUT II string head x 1
■Retainer knob x 1
■Cutting line x 10 pcs
■Speedwinder handle x 1
■Ethanol shield 2 cycle lubricant x 1
■Combination wrench x 1
■Harness x 1
■Drive shaft x 1
■Operator’s manual x 1
■Stamping wrench (RLT254CDSO only) x 1
SYMBOLS ON THE PRODUCT
Safety alert
Read and understand all
instructions before operating the
product, follow all warnings and
safety instructions.
Wear eye, hearing and head
protection when operating the
product.
Wear non-slip safety footwear when
using the product.
Wear non-slip, heavy-duty gloves.
Beware of thrown or ying objects.
Keep all bystanders, especially
children and pets, at least 15 m
away from the operating area
The product is not intended for use
with a toothed saw type blade.
Do not use metal blade (s) on the
product
RLT254CDSO: Rotational direction
and maximum speed of the shaft for
the cutting attachment.
RLT254SDSO: Rotational direction
and maximum speed of the shaft for
the cutting attachment.
Use unleaded gasoline intended for
motor vehicle use with an octane
rating of 91 ([R+M]/2) or higher.
Use full synthetic 2-stroke lubricant
for air cooled engines.
Mix the fuel mix thoroughly and also
each time before refueling.
Keep hands away from blades.
“Run” position
“FULL” choke position
"HALF" choke position
Press the primer bulb 10 times.
Squeeze the throttle lock and
throttle trigger to run.
Wait for 10 seconds.
RLT254CDSO: Guaranteed sound
power level and sound pressure
level
RLT254SDSO: Guaranteed sound
power level and sound pressure
level
PLACEHOLDER

4
CAUTION
Indicates a potentially hazardous
situation, which, if not avoided, may
result in minor or moderate injury.
CAUTION
(Without Safety Alert Symbol)
Indicates a situation that may result
in property damage.
ASSEMBLY
UNPACKING
This product requires assembly.
■Carefully remove the product and any accessories from
the box. Make sure that all items listed in the packing
list are included.
■Inspect the product carefully to make sure no breakage
or damage occurred during shipping.
■Do not discard the packing material until you have
carefully inspected and satisfactorily operated the
product.
WARNING
If any parts are damaged or missing, do not operate the
product until the parts are replaced. Failure to heed this
warning could result in serious personal injury.
WARNING
Do not attempt to modify the product or create
accessories not recommended for use with the product.
Any such alteration or modication is misuse and could
result in a hazardous condition leading to possible
serious personal injury.
WARNING
Never attach or adjust any attachment while the power
head is running. Failure to stop the engine may cause
serious personal injury.
WARNING
Be certain all knobs and fasteners are fully tightened
before operating the product. Check it periodically for
tightness during use to avoid serious injury.
ATTACHING THE FRONT HANDLE
■Loosen and remove the bolt and wing nut from the front
handle.
■Install the front handle onto the upper shaft.
■Replace the bolt and wing nut and tighten the wing nut
securely.
ATTACHING THE GRASS DEFLECTOR
■Insert the tab on the mounting bracket in the slot on the
grass deflector.
■Insert the screw into the grass deflector.
■Tighten the screw securely.
Pull the starter rope.
Pull: Quick release tab
To reduce the risk of injury or
damage, avoid contact with any hot
surface.
Regulatory compliance mark
Starting a warm engine by electrical
starter
Starting a cold engine by electrical
starter
Starting a warm engine by hand
Starting a cold engine by hand
SYMBOLS IN THIS MANUAL
Parts or accessories sold separately
Note
Warning
Risk of re
Do not smoke
Lock
Unlock
The following signal words and meanings are intended to
explain the levels of risk associated with the product:
DANGER
Indicates an imminently hazardous
situation, which, if not avoided, will
result in death or serious injury.
WARNING
Indicates a potentially hazardous
situation, which, if not avoided, could
result in death or serious injury.

5
ATTACHING THE POWER HEAD TO THE TRIMMER AT-
TACHMENT
WARNING
Never attach or adjust any attachment while the power
head is running. Failure to stop the engine may cause
serious personal injury.
■The trimmer attachment connects to the power head by
means of a coupler device.
■Loosen the knob on the coupler of the power head shaft
and remove the end cap from the attachment.
■Push in the button located on the attachment shaft.
■Align the button with the guide recess on the power
head coupler and slide the two shafts together.
■Rotate the attachment shaft until the button locks into
the positioning hole.
NOTE: If the button does not release completely in the
positioning hole, the shafts are not locked into place.
Slightly rotate from side to side until the button is locked
into place.
■Tighten the knob securely.
REMOVING THE ATTACHMENT FROM THE POWER
HEAD
■Loosen the knob.
■Push in the button and twist the shafts to remove and
separate the ends.
ATTACHING THE HARNESS
NOTE: Always use the harness with your trimmer.
■Connect the latch on the strap to the strap hanger.
■Adjust the strap to a comfortable position.
NOTE: To quickly release the product from the harness,
sharply pull the quick release tab.
INSTALLING THE PRO CUT II HEAD TO THE GRASS
TRIMMER
■Stop the engine.
■Remove the installed string head.
■Install the drive shaft unto the lower boom. Turn
clockwise for RLT254CDSO and counterclockwise for
RLT254SDSO using the combination wrench.
■Install the PRO CUT II string head on the drive shaft
until fully seated.
■Install the spool retainer. Turn clockwise for
RLT254CDSO and counterclockwise for RLT254SDSO.
INSTALLING THE LINE IN THE PRO CUT II HEAD
NOTE: Use a monolament line diameter 2.7 mm.
Use original manufacturer’s replacement line for best
performance. 2.4 mm line is not compatible with the PRO
CUT head. For the head to secure the line safely, 2.7 mm
line must be used.
■Stop the engine.
■Gather two of the pre-cut lengths of trimmer line
provided or cut two pieces of trimmer line (in 28 cm
lengths).
■Insert the line into the load slots located on the sides
of the line head. Line should be pushed in until
approximately 2 cm protrudes from the holes on the top
of the line head.
■Once the line protrudes 2 cm from the holes on the top
of the line head, gently pull back slightly to ensure the
line is gripped properly.
OPERATION
FUEL AND REFUELING
HANDLING THE FUEL SAFELY
■Always handle fuel with care, it is highly flammable.
■Always refuel outdoors where there are no sparks and
flames. Do not inhale fuel vapour. Do not smoke.
■Do not let petrol or lubricant come in contact with your
skin.
■Keep petrol and lubricant away from the eyes. If petrol
or lubricant comes in contact with the eyes, wash them
immediately with clean water. If irritation is still present,
see a physician immediately.
■Clean up spilled petrol immediately.
■Always transport and store fuel in a container approved
for petroleum.
MIXING THE FUEL
■The product is powered by a 2-stroke engine and
requires pre-mixing petrol and 2-stroke lubricant.
Premix unleaded petrol and 2-stroke engine lubricant in
a clean container approved for petrol.
■The engine is certified to operate on unleaded petrol
intended for motor vehicle use with an octane rating of
91 or higher.
■Do not use any type of pre-mixed petrol / lubricant from
fuel service stations, this includes the pre-mixed petrol /
lubricant intended for use in mopeds, motorcycles, etc.
■Use synthetic 2-stroke lubricant only. Do not use
automotive lubricant or 2-cycle outboard lubricant.
■Mix 2% synthetic 2-stroke lubricant into the petrol. This
is a 50:1 ratio.
■Mix the fuel thoroughly and also each time before
refueling.
■Mix in small quantities. Do not mix quantities larger than
usable in a 30-day period. A synthetic 2-stroke lubricant
containing a fuel stabiliser is recommended.
1 l + 20 ml =
2 l + 40 ml =
3 l + 60 ml = 50:1
4 l + 80 ml =
5 l + 100 ml =

6
FILLING THE TANK
WARNING
Check for fuel leaks. If any are found, correct them
before using the product to prevent re or burn injury.
■Clean surface around fuel cap to prevent contamination.
■Loosen fuel cap slowly to release pressure and to keep
fuel from escaping around the cap.
■Carefully pour fuel mixture into the tank. Avoid spillage.
■Prior to replacing the fuel cap, clean and inspect the
gasket.
■Immediately replace fuel cap and hand tighten. Wipe
up any fuel spillage. Move 9 m away from refueling site
before starting engine.
NOTE: It is normal for smoke to be emitted from a new
engine during and after first use.
WARNING
Always shut off the engine before fuelling. Never add
fuel to a machine with a running or hot engine. Move at
least 9 m from refuelling site before starting the engine.
Do not smoke!
STARTING AND STOPPING
WARNING
Never start or run the engine inside a closed or poorly
ventilated area; breathing exhaust fumes can kill.
STARTING A COLD ENGINE:
NOTE: Lay the product on the ground. Ensure the cutting
means will not contact anything when it starts to rotate.
1. Press the primer bulb 10 times.
NOTE: After the 7th press, the fuel should be visible in
the primer bulb. If not, continue pressing until the fuel
is visible.
2. Set the choke lever to choke position.
3. Hold down the throttle lock and then squeeze the
throttle trigger. Keep the throttle trigger squeezed
completely following steps 3 to 7. Pull the starter grip
until the engine attempts to start. Do not pull the starter
grip more than 4 times.
4. Set the choke lever to choke position.
5. Pull the starter grip until the engine starts. Do not pull
the starter grip more than 6 times.
NOTE: If the engine does not start, repeat the
procedure from step 2.
6. Allow the engine to run for 10 seconds.
7. Set the choke lever to position.
STARTING A WARM ENGINE:
1. Press the primer bulb 10 times.
2. Set the choke lever to choke position.
3. Hold down the throttle lock and then squeeze the
throttle trigger completely and pull the starter grip until
the engine starts. Do not pull the starter grip more than
6 times.
STARTING THE ENGINE USING AN ELECTRICAL
STARTER (OPTIONAL):
WARNING
Only use the RYOBI OES18 electrical starter. Use of any
other starter may damage the engine and cause serious
personal injury.
WARNING
Before using the electrical starter to start the product,
please read and understand completely the operation
manual of the OES18 electrical starter to avoid improper
operation and serious personal injury.
STARTING A COLD ENGINE BY ELECTRICAL START-
ER:
1. Install the starter bit into the electrical starter with the
pentagon bit facing outside.
2. Push the F/R button to the left until the pentagon
symbol shows on the F/R button.
3. Lay the product on the ground and make sure that the
cutting means do not come in contact with anything.
4. Press the primer bulb 10 times.
NOTE: After the 7th press, the fuel should be visible in
the primer bulb. If not, continue pressing until the fuel
is visible.
5. Set the choke lever to choke position.
6. Hold down the throttle lock and then squeeze the
throttle trigger completely with your left hand and keep
the throttle trigger squeezed completely through steps
6 to 12.
7. Use your right hand to put the starter bit shaft to the
shaft hole on the engine. Make sure the starter bit is
properly engaged.
NOTE: The electrical starter is equipped with a safety
interlock. Do not press and hold on the switch button
when putting the electrical starter shaft into the shaft
hole on the engine, otherwise the starter will not turn.
The starter will not turn if the electrical starter is not
properly engaged.
8. Press and hold the electrical starter switch button until
the engine attempts to start. Do not press the electrical
starter for more than 4 seconds.
9. Set the choke lever to choke position.
10. Press and hold the electrical starter switch button until
the engine starts.
NOTE: If the engine does not start, repeat the procedure
from step 5. Do not repeat the procedure more than
1 time. If the engine does not start after the second
attempt, see the solution instruction for the “Flooded
engine” in the “Troubleshooting” section of this manual.
11. Allow the engine to warm up for 10 seconds.
12. Set the choke level to choke position.
STARTING A WARM ENGINE BY ELECTRICAL START-
ER:
1. Install the starter bit into the electrical starter with the
pentagon bit facing outside.
2. Push the F/R button to the left until the pentagon

7
symbol shows on the F/R button.
3. Lay the product on the ground and make sure that the
cutting means do not come in contact with anything.
4. Press the primer bulb 10 times.
5. Set the choke lever to position.
6. Hold down the throttle lock and then squeeze the
throttle trigger completely with your left hand and keep
the throttle trigger squeezed completely. Use the right
hand to put the electrical starter shaft into the shaft
hole on the engine. Make sure the starter is properly
engaged.
7. Press and hold the electrical starter switch button until
the engine starts.
NOTE: If the engine does not start, repeat the procedure
from step 5. Do not repeat the procedure more than
1 time. If the engine does not start after the second
attempt, see the solution instruction for the “Flooded
engine” in the “Troubleshooting” section of this manual.
STOPPING THE ENGINE:
■Set the switch to the “STOP” (OFF) position.
OPERATING THE GRASS TRIMMER
Hold the product with the right hand on the rear handle
and the left hand on the front handle. Keep a rm grip with
both hands while in operation. The product should be held
at a comfortable position with the trigger handle about hip
height.
Always operate the product at full throttle. Prolonged
cutting at partial throttle will result in lubricant dripping from
the silencer. Cut tall grass from the top down. This will
prevent grass from wrapping around the shaft housing and
bump head which may cause damage from overheating. If
grass becomes wrapped around the bump head, stop the
engine, and remove the grass.
CUTTING TIPS
■Avoid hot surfaces by always keeping the product away
from your body.
■Keep the product tilted toward the area being cut; this is
the best cutting area.
■The product cuts when passing the product from right to
left. This will avoid throwing debris at the operator. Avoid
cutting in the dangerous area shown in illustration.
■Use the tip of the string to do the cutting; do not force
the string head into the uncut grass.
■Wire and picket fences cause extra string wear, even
breakage.
■Stone and brick walls, kerbs, and wood may wear string
rapidly.
■Avoid trees and shrubs. Tree bark, wood mouldings,
cladding and fence posts can be easily damaged by
the string.
ADVANCING THE LINE IN SPEED WINDER STRING
HEAD
Line advance is controlled by tapping the string head on
grass while running engine at full throttle.
■Run engine at full throttle.
■Tap the knob on ground to advance string. The string
advances each time the head is tapped. Do not hold the
knob on the ground.
NOTE: The line trimming cut-off blade on the grass
deector will cut the line to the correct length.
NOTE: If the string is worn too short, you may not be able
to advance the string by tapping it on the ground. If so, stop
the engine, and manually advance the line.
ADVANCING THE CUTTING LINE MANUALLY
■Stop the engine.
■Push the knob in while pulling on string(s) to manually
advance the line.
REPLACING THE SPEED WINDER STRING HEAD (FOR
RLT254CDSO ONLY)
■Stop the engine.
■Align the spanner along both flat side of arbor flange
washer.
■Turn the string head counterclockwise by hand to
remove the old one.
■Replace a new string head, align the nut in the string
head to the connector shaft of lower boom.
■Turn the string head clockwise by hand to tighten,
recommended torque is 6 N.M.
REPLACING THE SPEED WINDER STRING HEAD (FOR
RLT254SDSO ONLY)
■Stop the engine.
■Place the combination wrench through the hole in the
upper flange washer and the hole in the gear head.
■Turn the string head clockwise by hand to remove.
■Replace a new string head, align the nut in string head
to gear box shaft.
■Turn the string head counterclockwise by hand to
tighten, recommend torque is 6 N.M.
REPLACING THE LINE IN THE SPEED WINDER STRING
HEAD
■Ensure the product is in “off” position.
■Use a 2.4 mm diameter monofilament string.
■Cut one piece of string approximately 5.4 m in length.
■Rotate the bump knob clockwise as necessary to align
the arrows on the bump knob with the arrows on the
lower housing of string head.
■Insert one end of the string into the eyelet located on
the side of the string head and push until string comes
out through eyelet on the other side.
■Continue to push string through the string head until
the middle section of the string is inside the string head
and string outside the string head is evenly divided on
each side.
■Rotate the knob on the string head clockwise to wind
the line.
■Wind the string until approximately 20 cm remains
protruding from the string head.
CLEANING THE EXHAUST PORT AND MUFFLER
Depending on the type of fuel used, the type and amount
of lubricant used, and/or your operating conditions, the
exhaust port and silencer may become blocked with carbon

8
deposits. If you notice a power loss with your gas powered
product, a qualied service technician will need to remove
these deposits to restore performance.
CLEANING THE SPARK ARRESTOR
The spark arrestor must be cleaned or replaced every 25
hours to ensure proper performance of your product. Spark
arrestors may be in different locations depending on the
model purchased.
CLEANING THE AIR FILTER
For proper performance and long life, keep the air lter
clean.
■Ensure the product is in “off” position.
■Remove the air filter cover.
■Remove the air filter and clean it with warm soapy water.
■Rinse, and let the air filter dry completely.
■Work two drops of lubricant into the air filter.
■Replace the air filter (fits only one way).
■Replace the air filter cover.
NOTE: The lter should be replaced annually for best
performance.
FUEL CAP
WARNING
A leaking fuel cap is a re hazard and must be replaced
immediately.
The fuel cap contains a non-serviceable lter and a
check valve. A clogged fuel lter will cause poor engine
performance. If performance improves when the fuel cap is
loosened, check valve may be faulty or lter clogged.
REPLACING THE SPARK PLUG
WARNING
The material of the spark plug is metal. It becomes very
hot after you stop the engine. Wait for the engine to cool
down before disassembling the metal spark plug boot to
avoid personal injury.
NOTE: This engine uses a Champion RCJ6Y or equivalent
with 0.63 mm (0.025 in.) electrode gap. Use an exact
replacement and replace annually.
■Stop the engine.
■Hold the front portion of the rubber protect boot and pull
it away from the housing.
■Pull the rubber protect boot upward to release the hook.
■Twist the metal spark plug boot and pull it away from
the spark plug.
■Loosen the spark plug by turning it counter clockwise
with a wrench. Remove the old spark plug and replace
with a new one. Assemble back the metal spark plug
boot and the rubber protect boot.
ATTACHING THE HANGER CAP
To use the hanger cap, push in the button and place the
hanger cap over the lower end of the attachment. Slightly
rotate the cap from side to side until the button locks into
place.
NOTE: The secondary hole in the attachment shaft can be
used for hanging purposes as well.

9
WHAT’S IN THE BOX
x 1 x 1 x 1
x 1
x 1
x 1
x 1
x 1x 1
x 1 x 10
x 1 x 1
RLT254CDSO

10
WHAT’S IN THE BOX
x 1 x 1
x 1 x 1
RLT254SDSO
x 1
x 1
x 1
x 1
x 1
x 1 x 10
x 1 x 1

11
Know your product
KNOW YOUR PRODUCT
16
18
19
20
21
1
3
2
4
5
6
7
8
9
11
12
13
14
15
17
RLT254CDSO
RLT254SDSO
10
1. Starter grip
2. Choke lever
3. Fuel cap
4. Throttle lock
5. Throttle trigger
6. Front handle
7. Muffler
8. Spark arrestor
9. Straight shaft (RLT254SDSO)
10. Air filter
11. Grass deflector
12. Lower housing
13. Bump knob
14. Spool
15. Upper housing
16. Curved shaft (RLT254CDSO)
17. Knob
18. Spark plug
19. Hanger
20. Switch
21. Primer bulb

12
GETTING STARTED
2
RLT254CDSO
1 2a
1
23
4
5
4
Always wear safety goggles or safety glasses with side
shields when operating the product. Failure to do so could
result in objects being thrown into your eyes resulting
in possible serious injury. When handling the trimmer
assembly, wear non-slip, heavy-duty protective gloves.
Wear non-skid, protective footwear that will protect your
feet and improve your footing on slippery surfaces.
RLT254CDSO: Attach the grass deector.
Attach the D-handle. Attach the harness..

13
GETTING STARTED
RLT254SDSO
2
1
3
4
5
1
2
32b
(50 : 1)
50 : 1 / 2%
1
2
3
6
4
1
2
3
7
RLT254SDSO: Attach the grass deector. Attach the lower shaft.
Use synthetic 2-stroke lubricant only. Do not use automotive
lubricant or 2-stroke outboard lubricant. Mix 2% synthetic 2-stroke
lubricant into the petrol. This is a 50:1 ratio.
Remove the fuel cap and pour the fuel mixture into the tank. Avoid
spillage. Immediately replace fuel cap and hand tighten.

14
OVERVIEW
RLT254CDSO
RLT254SDSO
p.18-20 p.16-17 p.22-24
p.40
p.28
p.26 p.29-30
Trimmer safety
Line reload
Starting the product
Trimmer head replacement
Electrical starter
Advancing the line
Storage

15
OVERVIEW
RLT254SDSO
RLT254CDSO
Spark arrestor cleaning Installing line on Pro Cut II
Cleaning Pro Cut II Assembly
Spark plug replacement
Air filter cleaning
p.34 p.33 p.37
p.38p.39 p.31-32

16
OPERATION
x10
12
4x
VI
1
2
3
1
2
6x
VI
1
2
3
4
3
12
4
STARTING A COLD ENGINE
1. Press the primer bulb 10 times. Set the
choke lever to “Full” position.
2. Keep the throttle trigger squeezed completely
through steps 2 to 4 and pull the starter grip
until the engine attempts to start. Do not pull
the starter grip more than 4 times.
3. Set the choke lever to “half” position. Pull the
starter grip until the engine starts. Do not pull
the starter grip more than 6 times.
4. Allow the engine to run for 10 seconds. Set
the choke lever to “Run” position.
44
66

17
OPERATION
x10
12
6x
VI
1
2
3
1
2
STARTING A WARM ENGINE
1. Press the primer bulb 10 times. Set the
choke lever to position.
2. Squeeze the throttle trigger. Pull the starter
grip until the engine starts. Do not pull the
starter grip for more than 6 times.
66

18
OPERATION
RLT254CDSO RLT254SDSO
1
2
1
RLT254CDSO:
OPERATING THE TRIMMER
NOTE: Hold the product with the right hand
on the trigger handle and the left hand on
the left handle.
WARNING: Do not cut in a dangerous cut-
ting area. Avoid trees and shrubs. Tree bark,
wood mouldings, cladding, and fence posts
can easily be damaged by the line.
WARNING : Exercise extreme caution when
using the product.
1. To start operating the product, hold down
the throttle lock (1) and then squeeze the
throttle trigger (2) .