BEMW451 | Black&Decker BEMW451 MOWER instruction manual

G 5
(Original instructions)
Intended use
Your BLACK+DECKER BEMW451 lawn mower has been
designed for mowing grass. This appliance is intended for
consumer use only.
Safety instructions
Warning! When using mains-powered
appliances, basic safety precautions,
including the following, should always be
followed to reduce the risk of fire, electric
shock and personal injury.
uRead all of this manual carefully before
using the appliance.
uThe intended use is described in this
The use of any accessory or
attachment or the performance of any
operation with this appliance other
than those recommended in this
instruction manual may present a risk
of personal injury.
uRetain this manual for future
the instructions carefully. Be
familiar with the controls and the
proper use of the appliance.
u Never allow children or people
unfamiliar with these instructions to
use the machine. Local regulations
can restrict the age of the operator.
u Never operate the machine while
people, especially children, or pets are
u Keep in mind that the operator or user
is responsible for accidents or hazards
occurring to other people or their
(Original instructions)
Prevent body contact with earthed or
operating the machine always
grounded surfaces (e.g. metal railings,
wear substantial footwear and long
lampposts, etc.).
Do not operate the machine when
uNever operate the appliance with
barefoot or wearing open sandals.
defective guards or shields, or without
Avoid wearing clothing that is loose
safety devices, for example deflectors
fitting or that has hanging cords or ties.
and/or grass catchers, in place.
uThoroughly inspect the area where the
uOnly use the appliance in daylight or
machine is to be used and remove all
good artificial light.
objects which can be thrown by the
Do not expose the appliance to rain.
Do not use the appliance in damp or
uBefore using, always visually inspect
wet conditions. Preferably do not use
to see that the blade, blade bolt and
the appliance in wet grass.
the blade assembly are not worn or
Be sure of your footing, particularly on
damaged. Replace worn or damaged
slopes. Be aware that freshly cut grass
components in sets to preserve
is damp and slippery. Do not work on
balance. Replace damaged or
steep slopes.
unreadable labels.
uWork across the face of slopes, never
uBefore use check the supply and
up and down. Take extreme caution
extension cord for signs of damage or
when changing direction on slopes.
uDo not mow excessively steep slopes.
If the cord becomes damaged
uWalk, never run when using the
during use, disconnect the cord
appliance. Do not pull the appliance
from the supply immediately. DO
towards you or walk backwards when
using the appliance.
Switch on the appliance according to
Do not use the machine if the cord is
instructions and with your feet well
damaged or worn.
away from the blade.
uWear safety glasses or goggles when
uDo not start the machine when
operating this tool.
standing in front of the discharge
Use a face or dust mask whenever
the operations take place in dusty
Do not tilt appliance when switching it
surroundings. Hearing protection
on, except if the appliance has to be
should be worn whenever the sound
tilted for starting.
level seems uncomfortable.
uGuard against electric shock.
(Original instructions)
In that case, do not tilt the appliance
Check for any damage to the
more than absolutely necessary and
appliance, replace or repair any
lift only the part that is away from the
damaged parts, check for and tighten
operator. Always ensure that both
any loose parts.
hands are in the operating position
uTake care to keep the mains cable
before returning the appliance to the
away from the blade. Always be aware
of the position of the cable.
uSwitch off the appliance and wait for
uThe motor will continue to run for a few
the blade assembly to stop running
seconds after switching the appliance
if the appliance has to be tilted
off. Never attempt to force the blade to
for transportation when crossing
come to a standstill.
surfaces other than grass, and when
transporting the appliance to and from Maintenance and storage
u Before use, check the appliance for
the area to be mowed.
damaged or defective parts. Check for
uDo not lift or carry the appliance until
misalignment and seizure of moving
the blade has come to a complete
parts, breakage of parts, damage
to guards and switches and any
uKeep your hands and feet well away
other conditions that may affect its
from the blade.
operation. Ensure that the appliance
uDo not put your hands or feet near or
will operate properly and perform
under rotating parts.
its intended function. Never use
uKeep away from discharge openings at
the appliance when any guard or
all times.
enclosure is damaged or not in place.
uSwitch off, remove the plug from
Do not use the appliance if any part is
the socket and ensure that moving
damaged or defective. Do not use the
parts have stopped rotating before
appliance if the switch does not turn it
leaving the appliance unattended
on and off.
and before changing, cleaning or
Have any damaged or defective parts
inspecting any parts of the appliance
repaired or replaced by an authorised
or clearing a blockage. After striking
repair agent.
a foreign object. Inspect the machine
u Check the cable frequently for
for damage and make repairs before
damage. If the cable is damaged, it
restarting and operating the machine;
must be replaced by an authorised
uIf the appliance starts to vibrate
repair agent in order to prevent a
abnormally or if you hit a foreign
hazard. Inspect extension cables
object, switch the appliance off and
periodically. Replace a damaged
remove the plug from the socket.
extension cable immediately.
(Original instructions)
all nuts, bolts and screws on
the appliance tight to ensure a safe
working condition.
u Check the grass collector for wear or
damage and replace it if necessary.
Never use the appliance without the
grass collector.
u Be careful during adjustment of the
machine to prevent entrapment of the
fingers between moving blades and
fixed parts of the machine.
u When servicing the blades be aware
that, even though the power source is
switched off, the blades can still be
u When not in use, the appliance should
be stored in a dry place. Children
should not have access to stored
u Always allow the machine to cool
down before storing.
u Ensure that only replacement cutting
means of the right type are used.
recommended spare parts and
Additional safety instructions for
Always use an approved extension
cable suitable for the power input of
this tool (see technical data). The
extensioncable must be suitable for
outdoor use and marked accordingly.
Up to 30 m of 1.5 mm2 HO5VV-F
extension cable can be used without
loss of product performance.
Before use, inspect the extension
cable for signs of damage, wear and
ageing. Replace the extension cable
if damaged or defective. When using
a cable reel, always unwind the cable
u Do not transport the machine while the
power source is running
u Firmly grip handle with both hands
when operating the lawn mower.
u If at any time it is felt necessary to tilt
the lawn mower, make sure that both
hands remain in the operating position
while the lawn mower is tilted. Keep
both hands in the operating position
until the lawn mower is returned to rest
correctly on the ground.
u Never wear radio or music
headphones while operating the lawn
u Never attempt to make a wheel height
adjustment while the motor is running
or while the safety key is in the switch
u If the lawn mower stalls, turn mower
off, wait for blade to stop, before
attempting to unclog the chute or
remove anything from under the deck.
u Keep hands and feet away from
cutting area.
u Keep blades sharp.
Always use protective gloves when
handling the lawn mower blade.
u If you are using the grass collector,
check it frequently for wear and
deterioration. If excessively worn,
replace with a new grass collector for
your safety.
extreme caution when reversing
or pulling the lawn mower towards you.
u Do not put hands or feet near or under
the lawn mower.
Keep clear of the discharger opening
at all times.
u Clear the area where the lawn mower
is to be used of objects such as rocks,
sticks, wire, toys, bones etc., which
could be thrown by the blade.
Objects struck by the blade can cause
severe injury to persons. Stay behind
the handle when the motor is running.
u Do not operate the lawn mower
barefooted or while wearing sandals.
Always wear substantial footwear.
u Do not pull lawn mower backward
unless absolutely necessary. Always
look down and behind before and
while moving backward.
u Never direct discharged material
toward anyone. Avoid discharging
material against a wall or obstruction.
Material may ricochet back toward the
operator. Release the start handle to
turn the lawn mower off and stop the
blade when crossing gravel surfaces.
u Do not operate the lawn mower
without the entire grass collector,
discharge guard, rear guard, or other
safety protective devices in place and
working. Periodically check all guards
and safety protective devices to
ensure they are in good working order
and will operate properly and perform
their intended function.
Replace a damaged guard or other
safety device before further use.
(Original instructions)
leave a running lawn mower
u Always release the bail bar to stop the
motor and wait until the blade comes
to a complete stop before cleaning the
lawn mower, removing the grass bag,
unclogging the discharge guard, when
leaving the lawn mower, or before
making any adjustments, repairs or
u Operate lawn mower only in daylight
or good artificial light when objects in
the path of the blade are clearly visible
from the operating area of the lawn
u Do not operate the lawn mower while
under the influence of alcohol or drugs,
or when your are tired or ill. Always
stay alert, watch what you are doing,
and use common sense.
u Avoid dangerous environments.
Never operate the lawn mower in
damp or wet grass, never use lawn
mower in the rain. Always be sure of
your footing, walk, never run.
u If the lawn mower should start to
vibrate abnormally, release the on/off
switch, wait for the blade to stop and
then check for the cause immediately.
Vibration is generally a warning of
trouble, see the troubleshooting guide
for advise in the case of abnormal
u Always wear proper eye and
respiratory protection when operating
the lawn mower.
(Original instructions)
use of any accessory or
attachment not recommended for
use with this lawn mower could be
hazardous. Only use accessories
approved by BLACK+DECKER.
u Never overreach while operating the
lawn mower. Always be sure to keep
proper footing and balance at all times
while operating the lawn mower.
u Mow across the face of slopes, never
up and down. Exercise extreme
caution when changing direction on
u Watch for holes, ruts, bumps, rocks or
other hidden objects. Uneven terrain
could cause a slip and fall accident.
Tall grass can hide obstacles.
u Do not mow on wet grass or
excessively steep slopes. Poor footing
could cause a slip and fall accident.
u Do not mow near drop-offs, ditches, or
You could lose your footing or balance.
u Always allow the mower to cool down
before storing.
Pull the plug from the socket and pull
the battery pack from the machine. Make
sure that all moving parts have come to a
complete stop:
u Whenever you leave the machine;
u Before clearing a blockage;
u Before checking, cleaning or working
on the appliance.
The declared vibration emission values
stated in the technical data and the
declaration of conformity have been
measured in accordance with a standard
test method provided by EN50636 and
may be used for comparing one tool with
another. The declared vibration emission
value may also be used in a preliminary
assessment of exposure.
Warning! The vibration emission value
during actual use of the power tool can
differ from the declared value depending
on the ways in which the tool is used.
The vibration level may increase above
the level stated. When assessing
vibration exposure to determine safety
measures required by 2002/44/EC to
protect persons regularly using power
tools in employment, an estimation of
vibration exposure should consider, the
actual conditions of use and the way the
tool is used, including 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.
Do not operate the tool if the vibration
registers as abnormal.
Safety of others
appliance is not intended for use
by persons (including children) with
reduced physical, sensory or mental
capabilities, or lack of experience
and knowledge, unless they have
been given supervision or instruction
concerning use of the appliance by a
person responsible for their safety.
u Children must be supervised to
ensure that they do not play with the
(Original instructions)
striking a foreign object. Inspect
the appliance for damage and make
repairs as necessary.
Residual risks
Additional residual risks may arise when
using the tool which may not be included
in the enclosed safety warnings. These
risks can arise from misuse, prolonged
use etc. Even with the application of
the relevant safety regulations and the
implementation of safety devices, certain
residual risks can not be avoided. These
u Injuries caused by touching any
moving parts.
u Injuries caused by touching any hot
u Injuries caused when changing any
parts or accessories.
u Injuries caused by prolonged use of
the appliance.
When using any appliance for
prolonged periods ensure you take
regular breaks.
u Impairment of hearing.
u Health hazards caused by breathing
dust developed when using your
tool (example:- working with wood,
especially oak, beech and MDF.)
u If operating the mower in a damp
location is unavoidable, use a residual
current device (RCD) with a tripping
current of not more than 30 mA.
Use of an RCD reduces the risk of
electric shock.
u Never pick up or carry an appliance
while the motor is running.
Warning symbols
The following warning symbols are found
on the appliance along with the date
Warning! Read the manual prior
to operation.
Do not expose the appliance to
rain or high humidity.
Always remove the plug from
the socket before inspecting
a damaged cable. Be careful
not to use your appliance if the
cable is damaged.
Beware of sharp blades.
Beware of flying objects. Keep
bystanders away from the
cutting area.
Keep the cable away from the
cutting blades.
The blades will continue to
rotate after the machine is
switched off.
Directive 2000/14/EC
guaranteed sound power.
Electrical safety
Warning! This tool is double insulated; therefore no earth wire is required. Always check that
the power supply corresponds to the
voltage on the rating plate.
(Original instructions)
the supply cord is damaged, it must
be replaced by the manufacturer or an
authorised BLACK+DECKER Service
Centre in order to avoid a hazard.
u Electric safety can be further improved
by using a high sensitivity 30 mA
Residual Current Device (RCD).
This appliance includes some or all of the following features.
1. Switch box
2. On/off button
3. Start trigger
4. Upper handle
5. Lower handle
6. Grass collection box
7. Motor cover
8. Carry handle
Warning! Before assembly, make sure that the appliance is
switched off and unplugged.
Assembling the grass collection box (fig. A, B
and C)
The grass box requires assembly before use and comes in 3
u Clip the handle (6a) into the lid (6b) of the grass box
(fig. B). The handle will only fit one way round.
u Align the lid (6b) onto the base of grass collection box
(6c). Ensure that the guides are aligned (fig. C)
Note: Take extra care when aligning the 2 clips at the rear of
the grass collection box.
u Push down on the lid to secure all clips. Begin at the back
and ensure that all clips are securely located.
Fitting the grass collection box (fig. D)
Lift the flap (8) and place the grass collection box (6) over
the lugs.
Fitting the switchbox (fig. E)
Align the plastic pins on the switchbox (1) with the
holes on the handle (1b) making sure that the switchbox is
on the top edge of the handle.
u Slide the plastic pins on the switchbox (1) all the way
through the holes in the handle.
u Slide the plastic cover (1b) into the thin runners in the
switchbox (1).
u Secure the plastic cover (1b) with the 2 screws provided
Fitting the lower handle (fig. F)
Insert the ends of the lower handles (5) into the
corresponding holes in the mower.
u Press the handle down as far as it will go.
u Secure the handle using the screws (5a).
Assembling the upper handle (fig. G)
Fit the upper handle (4) to the lower handle (5) using the
knobs (4a), washers (4c) and screws (4b) as shown.
Note: The upper handle can be fixed in 2 different height
Switching on and off (fig. H)
Switching on
Push the on/off button (2).
Pull the start trigger (3) towards the handle.
Switching off
u Release the start trigger (3).
Warning! Never attempt to lock a switch in the on position.
Adjusting the height of cut (fig. I)
Warning! Ensure the blade has completely stopped and
disconnect the appliance from the mains.
The height of cut is adjusted by altering the height of all the
wheels, there are 3 positions to choose from.
u Remove the grass collection box (7).
u Turn the lawnmower upside down.
u Take hold of a wheel (24) and push/pull the axle from its
current location.
u Move the wheel (24) up/down into the next available
Note: Adjust one wheel at a time. Adjust one height position
at a time.
Up to edge cutting (fig. J, K)
Up to edge cutting allows you to cut grass right up to the edge
of a wall
or fence (fig J).
Up to edge cutting allows you to accurately cut grass right up
to the edge of your lawn (fig K).
u With the lawnmower parallel with the edge of your lawn,
push the lawnmower along the edge of the lawn. Ensure
that the edge of the mower is slightly over the edge of your
lawn (fig.K).
Replacing the blade (fig. L)
Warning! Ensure the blade has completely stopped and
disconnect the appliance from the mains.
Warning! Only use the specified replacement blade.
Warning! Use heavy-duty gloves to grip the blade.
(Original instructions)
To remove the blade:
u Turn the appliance onto its side.
u Using heavy-duty gloves, grip the blade.
u Use a 13 mm spanner to loosen and remove the blade
bolt (10) by turning the spanner anti-clockwise.
u Remove the blade (9) and blade bolt (10).
To replace the blade:
u Offer the blade up to bolt shaft and locate the blade bolt
(10) into the bolt shaft.
Note: When fitting a blade, the text on the blade must be
facing the user.
u Tighten the blade bolt (10) as firmly as possible by hand.
u Using heavy-duty gloves, grip the blade.
u Use a 13 mm spanner to securely tighten the blade bolt
(10) by turning the spanner clockwise.
Mowing (fig. M1 & M2)
We recommend to use your mower as outlined in this section
in order to achieve optimum results and to reduce the risk of
cutting the mains cable.
u Place the bulk of the mains cable on the lawn, close to the
starting point (position 1 in fig. M1).
u Switch the appliance on as described above.
u Proceed as shown in fig. M1
u Move from position 1 to position 2.
u Turn right and proceed towards position 3.
u Turn left and move towards position 4.
u Repeat the above procedure as required.
Warning! Do not work towards the cable as shown in fig. N2.
Blade sharpening
Note: The BEMW451 uses the BLACK+DECKER blade (Cat
# A6305). Keep blade sharp for best mower performance.
A dull blade does not cut grass cleanly. Use proper eye
protection while removing, sharpening, and installing blade.
Sharpening the blade twice during a mowing season is usually
sufficient under normal circumstances.
Sand causes the blade to dull quickly. If your lawn has sandy
soil, more frequent sharpening may be required.
Note: Replace bent or damaged blade immediately.
When sharpening the blade:
u Make sure blade remains balanced.
u Sharpen blade at the original cutting angle.
u Sharpen cutting edges on both ends of blade, removing
equal amounts of material from both ends.
To sharpen blade in a vice (fig.N)
Be sure the blade has stopped and the mower is
unplugged before removing the blade.
u Remove blade from mower. See instructions for removing
and installing blade.
u Secure blade (9) in a vice (11).
Wear proper eye protection and gloves and be careful not
to cut yourself.
Carefully file the cutting edges of the blade with a fine
tooth file (12) or sharpening stone, maintaining the angle
of the original cutting edge. Check balance of blade. See
instructions for blade balancing.
u Replace blade on mower and tighten securely.
Blade balancing (fig. O)
Check balance of the blade (9) by placing centre hole in
the blade over a nail or round shank screwdriver, clamped
horizontally in a vice. If either end of the blade rotates
downward, file along the sharp edge of that dropping end.
Blade is properly balanced when neither end drops.
No lubrication is necessary. Do not oil the wheels. They have
plastic bearing surfaces which require no lubrication.
Turn the mower off and let the blade come to a stop. Use only
mild soap and a damp cloth to clean the mower. Clean out any
clippings which may have accumulated on the underside of
the deck. After several uses, check all exposed fasteners for
Preventing corrosion
Fertilizers and other garden chemicals contain agents which
greatly accelerate the corrosion of metals. If you mow in areas
where fertilizers or chemicals have been used, the mower
should be cleaned immediately afterward as follows:
Turn the mower off and unplug mower. Wipe all exposed parts
with a damp cloth.
Your BLACK+DECKER corded/cordless appliance/tool has
been designed to operate over a long period of time with a
minimum of maintenance. Continuous satisfactory operation
depends upon proper tool/appliance care and regular
Warning! Before performing any maintenance on corded/
cordless power tools:
u Switch off and unplug the appliance/tool.
u Or run the battery down completely if it is integral and then
switch off.
u Unplug the charger before cleaning it. Your charger does
not require any maintenance apart from regular cleaning.
u Regularly clean the ventilation slots in your tool/appliance
and charger using a soft brush or dry cloth.
u Regularly clean the motor housing using a damp cloth. Do
not use any abrasive or solvent-based cleaner.
u Regularly use a blunt scraper to remove grass and dirt
from the underneath of the guard.
(Original instructions)
If your appliance seems not to operate properly, follow the
instructions below. If this does not solve the problem, please
contact your local BLACK+DECKER repair agent.
Warning! Before proceeding, release the bail bar to turn
mower off and wait for the blade to stop.
Machine fails
to operate.
Possible cause
Power turned
Fuse faulty/
Grass too long.
Possible solution
Turn power on.
Hand/arm weighted vibration value:
= 2.5m/s2 , uncertainty (K) = 1.5m/s2.
Sound pressure level at the operator's ear:
LPA: 78.5dB(A); K= 4.0dB(A)
Sound power level LWA: 93dB(A); K= 3dB(A)
EC declaration of conformity
Replace fuse.
Increase the height of
cut and move machine
to shorter grass to start.
Thermal cut out Allow motor to cool and
increase height of cut.
Machine func- Thermal cut out Allow motor to cool and
tions intermit- activated.
increase height of cut.
Height of cut
Increase height of cut.
leaves ragged too low.
finish or mo- Cutting blade
Replace the blade.
tor labours.
Check underneath the
of machine
machine and clear out
as necessary (always
wear heavy duty gloves)
Blade fitted
Refit blade correctly.
upside down.
Protecting the environment
Separate collection. Products and batteries
marked with this symbol must not be disposed of
with normal household waste.
Products and batteries contain materials that can be
recovered or recycled, reducing demand for raw materials.
Please recycle electrical products and batteries according to
local provisions. Further information is available at
Technical data
Power inpurt
No-Load speed
Height adjustment
Blade length
23 - 63
BEMW451 lawn mower
Black & Decker declares that these products described under
"technical data" are in compliance with:
2006/42/EC, EN 60335-1:2012 + A11:2014,
EN 60335-2-77:2010
2000/14/EC, Lawn Mower, L < 50cm, Annex VI,
DEKRA Certification B.V. Meander 1051 / P.O. Box 5185
6825 MJ ARNHEM / 6802 ED ARNHEM Netherlands.
Level of accoustic power according to 2000/14/EC (Article 12,
Annex III, L< 50cm):
measured sound power level LWA: 93dB(A); K=3dB(A).
guaranteed sound power level LWA: 96dB(A).
These products also comply with directive 2014/30/EU,
2011/65/EU. For more information, please contact Black &
Decker at the following address or refer to the back of the
The undersigned is responsible for compilation of the technical
file and makes this declaration on behalf of Black & Decker.
R. Laverick
Director of Engineering
Black & Decker Europe, 210 Bath Road, Slough,
Berkshire, SL1 3YD
United Kingdom
Black & Decker is confident of the quality of its products
and offers consumers a 24 month guarantee from the date
of purchase. This guarantee is in addition to and in no way
prejudices your statutory rights. The guarantee is valid within
the territories of the Member States of the European Union
and the European Free Trade Area.
(Original instructions)
To claim on the guarantee, the claim must be in accordance
with Black & Decker Terms and Conditions and you will need
to submit proof of purchase to the seller or an authorised
repair agent. Terms and conditions of the Black & Decker 2
year guarantee and the location of your nearest authorised
repair agent can be obtained on the Internet at www.2helpU.
com, or by contacting your local Black & Decker office at the
address indicated in this manual.
Please visit our website to register
your new Black & Decker product and receive updates on new
products and special offers.
(Original instructions)
New Zealand
Black & Decker (Australia) Pty. Ltd.
20 Fletcher Road, Mooroolbark,
Victoria, 3138
Tel. Fax 03-8720 5100
03-9727 5940
Black & Decker
5 Te Apunga Place
Mt Wellington
Aukland 1060
Tel. Fax +64 9 259 1133
+64 9 259 1122
United Kingdom &
Black & Decker
Tel. 01753 511234
Republic Of Ireland
210 Bath Road
Fax 01753 512365 Slough, Berkshire SL1 3YD
N533556 REV-0
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