Ryobi RLM46190YB User manual

ORIGINAL INSTRUCTIONS
Petrol Self-Propelled
Lawn Mower
RLM46190YB

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

User Manual
1
Safety, performance, and dependability have been given
top priority in the design of your petrol lawn mower.
INTENDED USE
The petrol lawn mower is intended for outdoor use only.
The product is designed for domestic lawn mowing. The
cutting blade should rotate approximately parallel to the
ground over which it is being wheeled. All four wheels
should touch the ground while mowing.
The product is a pedestrian-controlled, walk-behind mower
designed to be pushed by hand, or be guided by the
operator when using the self-propel feature.
The product should never be operated with the wheels off
the ground. It should not be pulled or ridden on. It should
not be used to cut anything other than domestic grass
lawns.
Do not use the product for any other purpose.
GENERAL SAFETY WARNINGS
WARNING
When using the product, the safety rules must be
followed. For your own safety and that of bystanders,
please read these instructions before operating the
product. Learn how to quickly stop the engine in case
of any emergency. Please keep the instructions safe for
later use.
WARNING
To avoid serious personal injury, do not attempt
to use the product until you read thoroughly and
understand completely the operator’s manual. If you
do not understand the warnings and instructions in
the operator’s manual, do not use the product. Call an
authorised service centre for assistance.
PERSONAL SAFETY
■The product is capable of amputating hands and feet,
and of throwing objects. Failure to observe all safety
instructions could result in serious injury or death.
■Be familiar with the controls and the correct use of the
product.
■Ensure before each use that all controls and safety
devices function correctly. Do not use the product if any
parts are damaged.
■Never allow children or people with reduced physical,
sensory, or mental capabilities or persons not familiar
with these instructions to operate, clean, or maintain the
product. Local regulations may restrict the age of the
operator. Children should be adequately supervised to
ensure they do not play with the product.
■Stay alert, watch what you are doing, and use common
sense when operating the product. Do not operate the
product while tired, ill, or under the influence of drugs,
alcohol, or medication. A moment of inattention while
operating the product may result in serious personal
injury.
■Wear heavy, long trousers, long sleeves, and sturdy
anti-slip footwear. Do not wear short trousers, sandals,
or go barefoot. Avoid wearing clothing that is loose-
fitting or that has hanging cords or ties.
■Always wear safety glasses with side shields.
■Wear hearing protection and safety glasses at all times
while operating the product. Use a face mask if the
operation is dusty.
■The use of hearing protection reduces the ability to
hear warnings (shouts or alarms). The operator must
pay extra attention to what is going on in the work area.
■Operating similar tools nearby increases both the risk
of hearing injury and the potential for other persons to
enter your work area.
■Always be sure of your footing, especially on slopes.
Keep firm footing and balance. Do not overreach.
Overreaching can result in loss of balance.
■Use the product across the face of slopes, and never
up and down. Exercise extreme caution when changing
direction on slopes.
■Do not use the product near drop-offs, ditches,
excessively steep slopes, or embankments. Poor
footing could cause a slip-and-fall accident.
■Plan your mowing pattern to avoid discharge of material
towards roads, public pavements, bystanders and
the like. Avoid discharging material against a wall or
obstruction, which may cause the material to ricochet
towards the operator.
WORK AREA SAFETY
■Never use product while people, especially children, or
pets are within 15 m because of the danger of objects
being thrown by contact with the blade.
■Objects struck by the lawn mower blade can cause
severe injuries to persons. Thoroughly inspect the area
where the product is to be used and remove all rocks,
sticks, metal, wire, bones, toys, or other foreign objects.
Remember, string or wire may entangle with the cutting
means.
■Always use the product in the daylight or in good
artificial light. The operator requires a clear view of the
work area to identify potential hazards.
■Do not operate the product in explosive atmospheres,
such as in the presence of flammable liquids, gases or
dust. The product creates sparks that may ignite the
dust or fumes.
■Do not operate the product on wet grass or in the rain.
■Do not use the product when there is a risk of lightning.
■Keep in mind that the operator or user is responsible
for accidents or hazards occurring to other people or
their property.

User Manual
2
■Tragic accidents can occur if the operator is not alert to
the presence of children. Children are often attracted to
the product 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 other than the
operator, be alert and turn the product off if a child
enters the area.
■Use extra care when approaching blind corners,
shrubs, trees, or other objects including overhanging
shrubs, which may block your view.
■Keep work area clean. Cluttered or dark areas invite
accidents.
LAWN MOWER SAFETY WARNINGS
■Before use, always visually inspect to ensure blades,
blade bolts, and cutter assembly are not worn or
damaged.
■Replace worn or damaged blades and bolts in sets to
preserve balance. Damaged blades and worn bolts are
major hazards.
■If the engine does not stop when the throttle lever is set
in “Stop” position, do not operate the product.
■Do not operate the product without the entire grass
catcher or the guard of the self-closing discharge
opening in place.
■The blade on the product is sharp. Use extreme caution
and wear heavy-duty gloves when fitting, replacing,
cleaning, or checking bolt security.
■Have the product serviced by an authorised service
centre to replace damaged or unreadable labels.
■Check all nuts, bolts, and screws at frequent intervals
for proper tightness to be sure that the product is in safe
working condition.
■Check the grass catcher frequently for wear, holes,
or deterioration. This can cause objects to be thrown
towards the operator.
■Replace worn or damaged parts before operating the
product.
■Turn on the engine carefully with the user behind the
handlebars in the operator safety zone. Never start the
product if:
●Not all four wheels are on the ground.
●The grass discharge chute is exposed and is not
protected by the grass box and grass discharge
chute cover.
●Hands and feet of all persons are not clear of the
cutting enclosure.
■Do not force the product. It will do the job better and
safer at the speed for which it was designed.
■Maintain a safe operating speed when using the
product; never run.
■Do not overload the product. Mowing long, thick grass
may cause the engine speed to drop or the power to cut
out. When mowing in long thick grass, set a high cutting
height on your first cut to help reduce the load.
■Stop the blade when crossing gravel surfaces.
■Do not pull back the product unless absolutely
necessary. If you must back the product away from a
wall or obstruction, first look down and behind to avoid
tripping or pulling the product over your feet.
■Stop the engine and allow the blade to stop if the
product has to be tilted for transportation when crossing
surfaces other than grass, and when transporting the
product to and from the area to be mowed.
■Never use the product with defective guards or shields,
or without safety devices, such as deflectors and/or
grass catchers, in place.
■Do not tilt the product when starting the engine or while
the engine is running. This exposes the blade and
increases the probability of objects being thrown.
■Turn on the engine carefully according to instructions,
and keep hands and feet away from the cutting area.
Do not put hands or feet near or under rotating parts.
Keep clear of the discharge opening at all times. Do not
start the product when standing in front of the discharge
opening.
■Never pick up or carry the product while it is running.
■When not in use, store the product in a well-ventilated,
dry, or locked-up place that is out of the reach of
children.
■Follow the manufacturer’s instructions for proper
operation and installation of accessories. Use only
accessories approved by the manufacturer.
■Do not operate the engine in a confined space where
dangerous carbon monoxide fumes can collect.
■Do not change the engine governor settings or over-
speed the engine.
■Turn off the product, and wait until the blade comes to
a complete stop. Allow the product to cool down, then
disconnect the spark plug wire:
●before leaving the product unattended (including
disposal of grass clippings).
●before clearing blockages or unclogging discharge
chute
●before checking, cleaning, or working on the
product
●before removing the grass catcher or opening the
grass discharge chute cover
●before refuelling
■If the product starts to vibrate abnormally, check
immediately to:
●inspect for damage, particularly the blades
●replace or repair any damaged parts
●check for and tighten any loose parts

User Manual
3
■If the product strikes a foreign object, follow these
steps:
1. Stop the product, and turn off the engine.
2. Thoroughly inspect the mower and grass catcher
for any damage.
3. Repair any damage before restarting and continuing
to operate the mower.
■Avoid holes, ruts, bumps, rocks, star pickets, or other
hidden objects. Uneven terrain could cause a slip-and-
fall accident.
■Allow engine to cool down before storing in any
enclosure.
■To reduce the risk of fire, keep the engine, silencer, and
petrol storage area free of grass, leaves, and excessive
grease.
■If the fuel tank has to be drained, this should be done
outdoors.
■Disconnect the spark plug wire before making any
adjustment, transporting, or storing the product. Such
preventive safety measures reduce the risk of starting
the product accidentally.
■The product is noisy, and may cause permanent
hearing injury if precautions to limit your exposure and
to reduce noise are not strictly adhered to.
SERVICE
■Service on the product must be performed by qualified
repair personnel only. Service or maintenance
performed by unqualified personnel could result in a
risk of injury to the use or damage to the product.
■When servicing, use only original manufacturer’s
replacement parts. Use of unauthorised parts may
create a risk of serious injury to the user, or damage
to the product.
NOTE: Only perform the tasks listed in this manual. For
other service or repair, have the product serviced by an
authorised service centre only.
Save this manual for future reference. Refer to them
frequently and use them to instruct others who may use the
product. If you loan the product to someone, include these
instructions also.
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 in use and the
operator should pay special attention to avoid the following:
■injury caused by vibration
–Always use the right tool for the job. Use designated
handles and restrict working time and exposure.
■injury caused by noise
–Exposure to noise can cause hearing injury. Wear
ear protection and limit exposure.
■injury from contact with the blades
■injury caused by thrown objects
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.
SYMBOLS
Some of the following symbols may be used on the product.
Please study them and learn their meaning. Proper
interpretation of these symbols will allow you to operate the
product better and safer.
Precautions that involve your safety.
To reduce the risk of injury, user must
read and understand the operator’s
manual before using the product.
To avoid injury, stay away from moving
parts at all times.
Danger! Keep hands and feet away.
To avoid injury, stay away from moving
parts at all times.
Danger of Ricochet. Keep all
bystanders at least 15 m away.

User Manual
4
Danger! Keep hands and feet away.
Before performing maintenance,
remove the spark plug socket.
STOP
Remove objects that could be thrown by
the rotating blade.
Keep bystanders at a safe distance
away from the product.
To reduce the risk of injury or damage,
avoid contact with any hot surface.
The product is a potential source
of electric shock. Do not expose to
moisture, rain, or snow. Do not operate
with wet hands or feet.
When the product is used, it gives
off carbon monoxide, an odourless,
colourless, poison gas. Breathing
carbon monoxide can cause nausea,
fainting, or death.
Add SAE 10W-30 API-SJ or higher
weight engine oil in the engine sump.
Fill the fuel tank with unleaded petrol
(91 or higher).
Turn the fuel tap to the “Open” position.
Set the throttle lever to the “Start/Run”
position.
Firmly push the primer bulb 3 times.
x2
Pull the starter grip up to 2 times. Once
the engine starts, release the starter
grip slowly so that the rope does not
snap back.
Mow when the grass catcher is empty.
Stop mowing when the grass catcher
is full.
Fuel and its vapours are explosive and
can cause severe burns or death.
Fuel and its vapors are extremely
ammable and explosive. Fire can
cause severe burns or death.
Use unleaded petrol intended for motor
vehicle use with an octane rating of 91
or higher.
Use SAE 10W-30 API-SJ or higher
weight oil.
Regulatory Compliance Mark (RCM).
Product meets applicable regulatory
requirements.
97
The guaranteed sound power level is
97 dB.
Stop the product.
DESCRIPTION
1. Self-propel bail
2. Throttle lever
3. Rotate knobs
4. Grass catcher
5. Fuel cap
6. Primer bulb
7. Air lter cover
8. Fuel tap
9. Side deector door
10. Spark plug boot
11. Height adjustment lever
12. Oil cap/Dipstick
13. Starter grip
14. Rope guide knob
15. Mulching plug
16. Fuel tap - close
17. Fuel tap - open
18. Locking mechanism
19. Blade disc
20. Ellipse washer
21. Flat washer
22. Lock washer
23. Loosen the disc bolt
24. Tighten the disc bolt
25. Disc bolt
26. Engine side
27. Lock nut
28. Washer
29. Wave washer
30. Blade
31. Bolt
32. Ground side
33. Spark plug
34. Air lter

User Manual
5
ASSEMBLY
UNPACKING
The product requires assembly.
■Carefully inspect the product to make sure that no
breakage or damage occurred during shipping.
■If any parts are damaged or missing, please call your
RYOBI service centre for assistance.
PACKING LIST
Lawn mower Side discharge deector
Grass catcher Handle bolts x 4
Operator’s manual Rotate knobs x 2
Cable guide Quick-release fasteners x 2
Rope guide Figure sheet
Mulching plug
WARNING
If any parts are damaged or missing, do not operate the
product until the parts are replaced. Using a product
with damaged or missing parts 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
The product safety systems or features shall not be
tampered with or disabled.
WARNING
Never attach or adjust any accessory while the product
is running. Failure to stop the engine may cause
serious personal injury.
WARNING
To prevent accidental starting that could cause serious
personal injury, always disconnect the engine spark
plug wire from the spark plug when assembling parts.
WARNING
Never operate the mower without the proper safety
devices in place and working. Never operate the mower
with damaged safety devices. Operation of the product
with damaged or missing parts could result in serious
personal injury.
WARNING
Do not allow familiarity with the product to make you
careless. Remember that a careless fraction of a second
is sufcient to inict serious injury.
INSTALLATION
See Fig. 2.
1. Raise the cutting blade height to the highest position.
2. Place the handles in the correct operating position.
Feed the bolts through the holes in the upper and lower
handles, then tighten the quick-release fasteners and
rotate knobs to secure the handles in place.
3. Install the grass catcher or the mulching plug.
INSTALLING THE GRASS CATCHER
See Fig. 5.
NOTE: Do not install the mulching plug when using the
grass catcher.
1. Lift the rear discharge door.
2. Lift the grass catcher by its handle, and place the
catcher under the rear door, so that the hooks on the
grass catcher frame are seated into the slots in the
handle bracket.
3. Release the rear door. When installed correctly, the
hooks on the grass catcher will rest securely in the slots
on the handle brackets.
4. Ensure that the rear door is fully engaged on the grass
catcher. Make sure that there is no gap between the
rear door and the grass catcher.
INSTALLING THE MULCHING PLUG
See Fig. 4.
NOTE: Do not install the grass catcher when using the
mulching plug.
1. Lift and hold up the rear discharge door.
2. Grasp the mulching plug by its handle, and insert the
right side of the plug into the rear of the deck as shown
on the manual gure page.
3. Proceed to slide the left side of the plug into the left
side of the deck opening as shown on the manual figure
page.
4. Push the mulching plug forward, then down until it locks
in place, firmly seated inside the rear of the deck.
REMOVING THE MULCHING PLUG
1. Lift and hold up the rear discharge door.
2. Grasp the mulching plug by its handle, lift up then pull
it out slowly.

User Manual
6
OPERATION
FUEL AND REFUELLING
WARNING
Always handle petrol with care; it is highly ammable.
■Use fresh fuel.
■Store fuel in containers specifically designed for this
purpose. In general, plastic containers are unsuitable.
■Always refuel outdoors where there are no sparks and
flames. Do not inhale fuel vapour. Do not smoke. Stay
away from open flames and sparks when filling fuel tank
or when handling fuel.
■Do not let petrol or oil come in contact with your skin.
■Keep petrol and oil away from the eyes. If petrol or oil
comes in contact with the eyes, wash them immediately
with clean water. If irritation is still present, see a
physician immediately.
■Immediately clean up spilled petrol.
FILLING THE TANK
See Fig. 6.
WARNING
Always shut off the engine and allow it to cool down for
5 minutes before refuelling. Never remove the cap of
the fuel tank, or add petrol to the product with a running
or hot engine. Move at least 9 m (30 ft) from refuelling
site before starting the engine. Do not smoke. Failure to
heed this warning could result in serious personal injury.
WARNING
Do not overll. Fill the fuel tank to 25 mm below the top
of the fuel neck. After fueling, never tilt the mower more
than 25 degrees as this could result in fuel leakage and
risk of re.
NOTE: Always use unleaded petrol (91 or higher).
1. Clean the surface around the fuel cap to prevent
contamination.
2. Loosen the fuel cap slowly to release pressure and to
keep fuel from escaping around the cap. Rest the cap
on a clean surface.
3. Carefully pour petrol into the tank. Avoid spillage.
4. Clean and inspect the gasket, then replace all fuel and
container caps securely. (See “Fuel cap“ section on
page 9)
■Wipe up any fuel spillage. Move 9 m away from
refuelling site before starting the engine.
NOTE: It is normal for smoke to be emitted from a new
engine during and after first use.
ADDING/CHECKING ENGINE OIL
See Fig. 6.
Engine oil has a major inuence on engine performance
and service life. For general, all-temperature use, SAE
10W-30 is recommended. Always use a 4-cycle motor oil
that meets or exceeds the requirements for API service
classication SJ.
NOTE: Non-detergent or 2-cycle engine oils damage the
engine and should not be used.
To add engine oil:
1. Ensure that the mower is level and the area around the
oil cap/dipstick is clean.
2. Remove the cap and seal from oil bottle.
3. Remove the oil cap/dipstick.
4. Slowly add oil. Fill to the “MAX” line on dipstick. Do not
overfill.
NOTE: When checking the oil level, seat the dipstick in
the oil fill hole but do not screw in.
5. Reinstall and secure the oil cap/dipstick.
To check engine oil:
1. Ensure that the mower is level and the area around the
oil cap/dipstick is clean.
2. Remove the oil cap/dipstick. Wipe clean, and reseat in
oil ll hole but do not screw in.
3. Remove the oil cap/dipstick again, and check the oil
level. Add oil as needed.
STARTING/STOPPING THE MOWER
See Fig. 6.
WARNING
Never start or run the engine inside a closed or poorly-
ventilated area; breathing exhaust fumes can kill.
Exhaust fumes can build up inside a poorly-ventilated
area.
Pre-checks
1. Check and ensure that the oil level is sufcient by
inspecting the oil level with the dipstick seated. Check
and ensure that the petrol tank has sufcient regular
unleaded fuel.
2. Turn the fuel tap to the “Open“ position.
Starting the engine
1. Set the throttle lever to the start/run position (down
against the handle).
2. Firmly push and slowly release the primer bulb 3 times.
NOTE: When pushing and releasing the primer bulb,
ensure that your finger covers and seals the centre hole
(in the bulb), and that you release the bulb at a slow
pace. This creates a partial vacuum, drawing petrol into
the primer from the carburettor. Pushing the primer bulb
forces fuel into the inlet manifold to enrich the mixture.
NOTE: Priming the engine may not be necessary when
restarting a warm engine.

User Manual
7
3. Pull the starter grip up to 2 times.
NOTE: If the engine does not start after 2 pulls, repeat
the process of priming the fuel bulb 3 more times, then
pull the starter grip up to 2 times. Once the engine
starts, release the starter grip slowly so that the rope
does not snap back.
4. Ensure that the throttle lever is set to start/run position
(down against the handle), then proceed with mowing.
Stopping the engine
Return the throttle lever to the “Stop“ position (hard up
against the top of the mower handles).
Propelling the product
See Fig. 7.
1. Start the product. (See the “Starting the engine“ section
on page 6)
2. To self-propel, push the self-propel bail towards the
handle. Release the self-propel bail to stop the wheel
drive.
3. To manually propel, do not engage the self-propel bail.
SETTING THE BLADE HEIGHT
See Fig. 8.
When shipped, the wheels on the mower are set to a low-
cutting position. Before using the mower for the rst time,
adjust the cutting position to the height best suited for your
lawn. The average lawn should be between 38 mm to 50
mm during cool months and between 50 mm and 76 mm
during hot months.
To set the blade height:
1. Stop the product, and wait for the blade to come to a
complete stop.
2. To raise the blade height, grasp the height adjustment
lever, and move it toward the back of the mower.
3. To lower the blade height, grasp the height adjustment
lever, and move it toward the front of the mower.
For best performance of the mower, use the cutting heights
for each cutting mode in the table below.
Cutting mode Cutting
height
Reference
Mulch Mode 3-8 See Fig. 4.
Catch Mode 3-8 See Fig. 5.
Side discharge mode 1-8 See Fig. 9.
INSTALLING SIDE DISCHARGE DEFLECTOR
See Fig. 9.
NOTE: When using the side discharge deector, do not
install the grass catcher. The mulching plug should remain
installed. When the side discharge deector is not used,
ensure that the side discharge door is in lock position.
1. Push the locking mechanism.
2. Lift the side discharge door.
3. Align the hooks on the deector with the hinge rod on
the underside of the door. Lower the deflector until the
hooks are secured on the mulch door hinge rod. Then
release the deflector and side discharge door.
NOTE: After each use, clean and inspect the locking
mechanism to ensure that it is still functioning properly.
MOWING TIPS
■Make sure that the lawn is clear of stones, sticks, wires,
and other objects that could damage the lawn mower
blades or engine. Such objects could be accidentally
thrown by the mower in any direction and cause serious
personal injury to the operator and others.
■For best performance, always cut off one-third or less of
the total height of the grass.
■When cutting long grass, reduce walking speed to allow
for more effective cutting and a proper discharge of the
clippings.
■Do not cut wet grass. It will stick to the underside of the
deck and prevent proper bagging or discharge of the
grass clippings.
■New or thick grass may require a narrower cut path.
■When the fuel tank is empty and before refuelling, tip
the mower on the left hand side with the fuel cap at
the highest position to prevent fuel spillage. Remove
the spark plug lead to prevent accidental starting. The
blade is sharp; avoid contact with it.
■Check the blade and underside of deck for any damage
or build up of debris, and clean if necessary. Check the
blade bolt and ensure that it is installed securely.
SETTING THE HANDLE LENGTH
See Fig. 10.
The height of the handle can be easily adjusted for operator
preference.
1. Loosen and remove the rotate knobs.
2. Remove bolts.
3. Reinsert bolts in a higher or lower position.
4. Tighten the rotate knobs to secure the upper handle.
SLOPE OPERATION
See Fig. 11.
■Slopes are a major factor related to slip-and-fall
accidents that can result in severe injury. Operation on
slopes requires extra caution. If you feel uneasy on a
slope, do not mow it. For your safety, do not attempt to
mow slopes greater than 15 degrees.
■Mow across the face of slopes, never up and down.
Exercise extreme caution when changing direction on
slopes.
■Watch for holes, ruts, rocks, hidden objects, or bumps
which can cause you to slip or trip. Tall grass can hide
obstacles. Remove all objects such as rocks, tree limbs,
which could be tripped over or thrown by the blade.
■Always be sure of your footing. A slip-and-fall accident
can cause serious personal injury.
■Do not mow near drop-offs, ditches, or embankments;
you could lose your footing or balance.

User Manual
8
EMPTYING THE GRASS CATCHER
See Fig. 12.
1. Stop the mower, and wait for the blade to come to a
complete stop.
2. Lift the rear discharge door.
3. Grasp the grass catcher by its handle, and lift to remove
from the mower.
4. Empty the grass clippings.
5. Lift the rear discharge door, and reinstall the grass
catcher.
WARNING
Use caution when lifting or tilting the product for
maintenance, cleaning, storage, or transportation. The
blade is sharp, even though the engine is shut off, the
blades can still be moved. Keep all body parts away from
the blade while it is exposed.
MAINTENANCE
WARNING
If the product is not maintained correctly, the life span of
the product may be reduced, and built-in safety features
may not function correctly, thus increasing the potential
for serious injury. Keep the product in good working
condition.
WARNING
Before performing any maintenance, stop the product,
allow the blade to come to a complete stop, and
disconnect the spark plug wire from the spark plug.
Failure to heed this warning could result in serious
personal injury.
WARNING
When servicing, use only original manufacturer’s
replacement parts. Use of any other parts may create a
hazard or cause product damage.
GENERAL MAINTENANCE
You may make adjustments and repairs described in this
manual. For other repairs, contact an authorised service
centre.
■Avoid using solvents when cleaning plastic parts. Most
plastics are susceptible to damage from various types
of commercial solvents and may be damaged by their
use. Use clean cloths to remove dirt, dust, oil, or grease.
■Periodically check all nuts and bolts for proper tightness
to ensure safe operation of the product.
■Remove any buildup of grass and leaves on or around
the engine and engine cover. Occasionally wipe the
mower clean with a dry cloth. Do not use water to clean
the product.
■Frequently check the grass catcher for wear or
deterioration.
WARNING
Do not, at any time, let brake uids, gasoline, petroleum-
based products, or penetrating oils come in contact
with plastic parts. Chemicals can damage, weaken, or
destroy plastic which may result in serious personal
injury.
SPARK ARRESTOR
■The product is fitted with a spark arrestor (which is
inside the exhaust).
NOTE: It is recommended that the spark arrestor is only
cleaned only at an authorised service centre.
LUBRICATION
All of the bearings in the product are lubricated with a
sufcient amount of high grade lubricant for the life of
the unit under normal operating conditions. Therefore, no
further bearing lubrication is required.
REPLACING THE CUTTING BLADE
See Fig. 13.
WARNING
Always protect hands by wearing heavy-duty gloves and
wrapping the cutting edges of the blade with rags and
other materials when performing blade maintenance.
Improper handling of blade could result in serious
personal injury.
Be careful when replacing the mower blade. Ensure that
your ngers do not get caught between the moving blade
and the xed parts of the product.
For best results, the mower blade must be kept sharp.
Replace a bent or damaged blade immediately.
WARNING
Use only replacement blades approved by the
manufacturer. Using a blade that is not approved by
the manufacturer of the product is hazardous and could
result in serious injury, damage to the product, and will
void your warranty.
WARNING
Drain the fuel rst before tilting the mower to replace the
blade.

User Manual
9
1. Stop the product. Make sure that all moving parts have
come to a complete stop. Allow the product to cool
down. Disconnect the spark plug wire.
2. Turn the product on its side, carburettor (air lter side)
facing up.
NOTE: Make sure that the carburettor is facing up.
3. Wedge a block of wood between the blade disc and
mower deck to prevent the blade disc from turning.
4. Using a socket (not provided), loosen the disc bolt
by turning the bolt in a counterclockwise direction as
viewed from the bottom of the mower.
5. Remove the disc bolt, lock washer, flat washer, ellipse
washer, and blade disc.
NOTE: If any of the individual blades are dull, damaged,
or need replacing, they should be replaced using only
original equipment parts. If any single blade needs to
be replaced, then the complete set of four (4) blades
need to be replaced. Failure to replace the blades as a
set may result in an out of balance situation resulting in
damage to the engine.
6. Loosen the blade lock nuts on the old blades by turning
them counterclockwise.
7. Remove the blade lock nuts, washers, blades, wave
washers, and bolts from the blade disc.
8. Reassemble the new blades as shown in the
accompanying figure sheet. Ensure that the new blades
raised edges face towards the inside of the mower
deck once the disc is reinstalled to the mower. If the
blades are not assembled correctly, the grass will not
get directed to the rear of the deck (to be caught in the
catcher). Ensure that the wave washer is positioned
between the blade and the disc. Ensure that the lock
nuts are tightened (clockwise) over the flat washer and
disc, properly securing the blade to the disc.
NOTE: When attaching the blades on the blade disc,
tighten the blade bolt until it is securely fastened (the
nut should not move when the blade is moved). The
nut should then be tightened 1/6 of a turn (one flat).
Replace the blades as a complete set of four (4) to
maintain balance.
9. Assemble the blade disc, at washer, lock washer,
and disc bolt on the shaft. Finger tighten the disc bolt
by turning in a clockwise direction as viewed from the
bottom of the mower.
10. Torque the disc bolt using a torque wrench (not
provided) to ensure that the bolt is properly tightened.
The recommended torque for the disc bolt and blade
lock nut is 35–45 Nm (26–33 ft. lb.). After the bolt is
finger tight, it should be tightened a further 1¾ turns.
NOTE: When securing the blade disc, tighten the disc
bolt until the lock washer is completely flattened.
NOTE: Do not sharpen the blades, replace with new
item. Blades need to be properly balanced to avoid
damage and personal injury.
NOTE: Ensure that all parts are replaced in the exact
order in which they were removed.
CLEANING THE AIR FILTER
See Fig. 15.
The product has a paper air lter, and it cannot be washed.
1. Remove the air lter element cover by pushing the latch
with your thumb while gently pulling the cover.
2. Remove the paper air lter element for inspection.
3. After removing the air lter element, most debris can be
removed by tapping it gently against a hard surface, or
brushing the surface lightly.
NOTE: A dirty air filter element restricts air flow and may
result in damage to the engine. The life span of the air
filter element depends upon the environment in which
the product is used, and it should be inspected and
cleaned regularly and replaced when dirty. Replacement
air filter elements can be ordered through the Bunnings
special orders desk. The RYOBI part number for
Australia and New Zealand is 17150Z0301100000.
4. Reinstall the cleaned or new air lter element into the
air lter base.
5. Replace and secure the cover of the air lter element.
NOTE: The air filter element should be replaced
annually for best performance or sooner, if necessary.
FUEL CAP
WARNING
A leaking fuel cap is a re hazard and must be replaced
immediately.
The fuel cap contains a sealing gasket and a check valve
to allow air in.
A clogged fuel cap causes poor engine performance. If
performance improves when the fuel cap is loosened, the
check valve may be faulty or clogged. Replace the fuel cap
if required.
When retting the fuel cap, ensure that it is not cross-
threaded; otherwise it will leak.
CHANGING THE ENGINE OIL
See Fig. 16.
1. Stop the product. Make sure that all moving parts have
come to a complete stop. Allow the product to cool
down. Disconnect the spark plug wire.
2. Ensure that the fuel tank is completely empty before
tipping the unit over; otherwise, fuel will leak out.
3. Change the engine oil after every 20 hours of use.
Change the oil while the engine oil is still warm, but not
hot to allow the oil to drain quickly and completely.
4. Remove the oil ll cap/dipstick.
5. Tip the mower onto its side, and allow the oil to drain
from the oil ll hole into an approved container.
6. Place the mower upright, and rell with oil following the
instructions in the “Adding/Checking Oil” section.
NOTE: Dispose of used oil at an approved disposal
site. See your local oil retailer for more information.
20191011v2

User Manual
10
SPARK PLUG MAINTENANCE
See Fig. 14.
The spark plug must be properly gapped and free of
deposits in order to ensure proper engine operation. To
check:
1. Stop the product. Make sure that all moving parts have
come to a complete stop. Allow the product to cool
down.
2. Remove the spark plug boot.
3. Clean any dirt from around base of spark plug.
4. Remove the spark plug using a 20.6 mm spark plug
socket (not provided).
5. Inspect the spark plug for damage, and clean with a
wire brush before reinstalling. If insulator is cracked or
chipped, replace the spark plug.
NOTE: The recommended spark plug model is NGK
BPR7HS.
6. Measure the plug gap. The correct gap is 0.71 mm −
0.79 mm. To widen the gap, carefully bend the ground
(top) electrode. To lessen gap, gently tap ground
electrode on a hard surface.
7. Seat the spark plug in position, and thread in by hand to
prevent cross-threading.
8. Tighten with a wrench to compress the washer. If spark
plug is new, use 1/2 turn to compress the washer to the
appropriate amount. If reusing old spark plug, use 1/8
to 1/4 turn for proper washer compression.
NOTE: An improperly tightened spark plug becomes
very hot and could damage the engine.
9. Reinstall the spark plug boot.
DRIVE GEAR MAINTENANCE
See Fig. 17.
To ensure smooth operation of the wheels, clean the wheel
assembly before storage.
1. Remove the spat (hub cap).
2. Remove the nut and wheel, and set aside.
3. Remove the e-ring, pins, and wheel gear. Clean any
dirt from these items and the end of the drive shaft
by wiping with a dry cloth. If necessary, use rubbing
alcohol to remove any stubborn dirt.
CAUTION: Do not lubricate any of the wheel components
Lubrication may cause the wheel components to fail during
use, which could result in mower damage.
4. Reinstall the wheel gear with the arrows facing the front
of the mower. Reinstall the pins and e-ring.
5. Reinstall the wheel and nut. Tighten the nut to secure.
6. Assemble the spat (hub cap).
REPLACING WHEELS
See Fig. 18.
WARNING
Use only the manufacturer’s replacement wheels. Using
wheels that are not approved by the manufacturer is
hazardous and could result in serious personal injury.
1. Stop the product. Make sure that all moving parts have
come to a complete stop. Allow the product to cool
down. Disconnect the spark plug wire.
2. Remove the spat (hub cap).
3. Remove the nut from the wheel axle, then remove the
wheel.
4. Replace with new wheel, and reinstall the nut to secure.
5. Assemble the spat (hub cap).
STORING THE PRODUCT
WARNING
Do not store the product with petrol in the tank inside a
building where fumes may reach an open ame or spark.
When storing the mower for 30 days or more:
1. Perform one of the following:
●If using a fuel stabilizer, follow the stabilizer
manufacturer’s directions to add stabilizer to petrol
in the fuel tank. Run the engine at least 10 minutes
after adding stabilizer to allow the stabilizer to reach
the carburettor.
●If not using a fuel stabilizer, allow the engine to run
until the product is completely out of fuel.
2. Once the engine has stopped, allow the blade to come
to a complete stop, and disconnect the spark plug wire.
3. Turn the product on its side (with carburettor facing up),
and clean grass clippings that have accumulated on the
underside of the mower deck.
4. Clean the underside of the mower deck.
5. Wipe the product clean with a dry cloth.
6. Check all nuts, bolts, knobs, screws, and fasteners for
tightness.
7. Inspect moving parts for damage, breakage, and wear.
Have repairs made on any damaged or missing parts.
8. Store the product in a well-ventilated area that is clean,
dry, and is out of the reach of children.
●Do not store the product near corrosive materials,
such as fertilizer or rock salt.
●Do not store the product outdoors.
To lower the handle before storing
See Fig. 3.
1. Loosen the starter rope guide knob. Remove starter
rope from the guide, and allow to retract into engine.
2. Remove the handle knobs and bolts from each side of
the lower handle at the handle bracket, (mounted on
the mower deck).
3. Fully loosen the handle knobs on the sides of the
handle, and fold the upper handle down.
4. Push inward on each side of the lower handle, and
lift the sides of the lower handle past the edges of the
handle mounting brackets.
5. Fold the lower handle forward, making sure not to bend
or kink the control cables.

User Manual
11
TRANSPORTATION
■Stop the product. Make sure that all moving parts have
come to a complete stop. Allow the product to cool
down before storing or transporting. Disconnect the
spark plug wire.
■Clean all foreign materials from the product. Store the
product in a cool, dry, and well-ventilated place that is
inaccessible to children. Keep the product away from
corrosive agents such as garden chemicals and de-
icing salts. Do not store the product outdoors.
■For transportation in a vehicle, secure the product
against movement or falling to prevent injury to persons,
damage to the product, or loss of fuel.
WARNING
Use caution when lifting or tilting the product for
maintenance, cleaning, storage, or transportation. The
blade is sharp, keep all body parts away from the blade
while it is exposed.
PRODUCT SPECIFICATIONS
Petrol Lawn Mower RLM46190YB
Engine displacement 190 cc OHC
Type 4 stroke air cooled engine
No-load speed of cutting
means
2800 min-1
Fuel consumption at Max.
Engine performance
1.4 kg/h
Specic fuel consumption at
Max. Engine performance
395 g/kW.h
Cutting width 46 cm
Self-propelled speed 1.2 m/s
Cutting height adjustment 8 positions, 20 mm - 75 mm
Wheel size (Front/ Rear) 17.8 cm (7 in.) /
20.3 cm (8 in.)
Fuel tank capacity 1200 ml (+/-50 ml)
Fuel type Unleaded fuel (91 or higher)
Oil type SAE 10W-30 API-SJ or higher
weight oil
Engine sump capacity 600 ml (+/-50 ml)
Net weight 38.6 kg
Grass catcher capacity 55 L
Disc bolt, blade bolt and blade
lock nut torque
35~45 Nm
Engine mounting bolt torque 20~25 Nm
Vibration Level (in accordance with Annex G of EN ISO 5395-1)
Right Handle 2.3 m/s2
Left Handle 2.15 m/s2
Uncertainty of Measurement 1.5 m/s2
Declared vibration value 5 m/s2
Noise emission level (in accordance with AS3534-1988)
The guaranteed sound power
level LwA
97 dB(A)
Replacement part
Blade 099923021001
Rear drive wheel 099923022075
VIBRATION LEVEL
The declared vibration value has been measured with a
standard test method and may be used to compare one
tool with another.
The declared vibration value may be used in a preliminary
assessment of exposure.
The vibration emission during actual use of power tool can
differ from the declared total value depending on the ways
in which the tool is used.
Identify safety measures to protect yourself based on an
estimation of exposure in the actual conditions of use,
taking account of all parts of the operating cycle such as the
times when the tool is switched off and when it is running
idle in addition to the trigger time.

User Manual
12
MAINTENANCE SCHEDULE
Before
each use
After 1st month
or 20 hours of
operation
Every 3 months
or 50 hours of
operation
Every 6 months
or 100 hours
of operation
Every 12 months
or after 300
hours
of operation
Check engine oil n
Change engine oil n n
Check air lter n
Clean air lter n
Change air lter n
Check/adjust spark plug n
Replace spark plug n
Check/adjust idle speed n
Check/adjust valve
clearance* n
Clean fuel tank and lter* n
Check fuel tube n
Check for worn or
damaged parts n
Check all starting
interlock and throttle
lever for proper
functionality
n
Check if the blade stops
within 6 seconds after
setting the throttle lever
to the “Stop“ position
(hard up against the top
of the mower handles).
n
* These items should only be carried out by an authorised service center.
NOTE: Maintenance should be performed more frequently when the product is used in dusty areas.
When the engine has exceeded the maximum figures specified in the table, maintenance should still be cycled
according to the intervals of time or hours stated herein.

User Manual
13
TROUBLESHOOTING
Problem Possible cause Solution
The mower does not
start. (Ensure that
the throttle lever is
pushed all the way
down.)
There is no petrol or old petrol is in
the fuel tank.
Fill the mower with fresh petrol. (See page 6.)
The fuel tap is in the “close“ position. Set fuel tap to the “open“ position. (Refer to the Figure
Sheet)
The primer bulb was not pressed. Firmly push and slowly release the primer bulb at least
3 times.
The engine is ooded. Wait for 5 minutes, then try starting the mower again.
(Refer to the “Starting/stopping the mower“ section)
No spark. Check for sparks. Remove the spark plug. Reattach the
spark plug cap and lay spark plug on the metal cylinder.
Pull the starter grip and watch for sparks at the spark plug
tip. If there is no spark, repeat the test with a new spark
plug. (See page 10.)
The starter grip is difficult to pull and
may be stuck.
Contact an authorised service centre.
The engine starts
but does not run
properly.
The carburettor requires adjustment. Contact an authorised service centre.
The engine starts
but stops soon after
starting.
The carburettor requires adjustment. Contact an authorised service centre.
The engine does not
reach full speed and/
or emits excessive
smoke.
The air lter is dirty. Clean the air lter. (Refer to the “Cleaning the air lter“
section)
The carburettor requires adjustment. Contact an authorised service centre.
The engine runs but
vibrates excessively.
The blade disc is unbalanced. Replace the blades in sets of four (4) to maintain the
balance.
The motor shaft is bent. Stop the product. Make sure that all moving parts have
come to a complete stop. Allow the product to cool down.
Disconnect the spark plug wire. Inspect for damage. Have
the damage repaired by an authorised service centre
before restarting the product.
The cut grass is not
entering the grass
catcher.
The mulching plug is inserted. Remove the mulching plug when using the grass catcher.
The cutting height is set too low. Raise the cutting height. Cutting very wet grass at a low
cutting height will also greatly hinder the ability of the
mower to throw the grass to the catcher. We recommend
cutting the grass when it is not as wet.
The grass catcher is full. Empty the grass catcher to allow newly cut grass clippings
to enter.

099923327002-01
Techtronic Industries Australia Pty Ltd
31 Gilby Road, Mount Waverley, VIC 3149,
Melbourne, Australia
Techtronic Industries N.Z. Limited
Unit C, 70 Business Parade South,
Highbrook, Auckland 2013, New Zealand
RYOBI is a trademark of Ryobi Limited, and is used
under license.
NGK is a registered mark of NGK Spark Plug Co Limited.
© 2019 Techtronic Cordless GP. All rights reserved.
Imported by:
Imported by: