Black & Decker | GX302 | User manual | Black & Decker GX302 User manual

Hover Mower
On your purchase of your Black & Decker hover
This user manual provides important operating and
maintenance instructions for all of the hover mowers
in the Black & Decker GX302 range.
User manual
Know your mower
Read all of this manual carefully, observing all
the recommended safety instructions before,
during and after using your mower, and
maintain your mower in good working order.
Familiarise yourself with the controls on your
mower before attempting to operate it, but
above all, be sure you know how to stop
your mower in an emergency.
Retain this user manual and all other
literature supplied with your mower for future
Safety instructions
• Never allow children or persons who are
unfamiliar with this type of mower to use
it, nor anyone who has not read this user
Do not allow children, animals or
other persons near your mower
6m / 20ft
when in use - always keep them
at least 6m (20ft) away from the
cutting area.
• Remember that the operator is
responsible for accidents or hazards
occurring to other people or their property.
• Your mower is designed for use on AC
(mains) electrical supplies only - do not
attempt to use it on any other supply.
• Plug your mower into a power point never a lighting socket.
• Never carry your mower by the cable or
jerk the cable to seperate the
connectors. Keep the cable away from
heat sources, oils or sharp edges. Check
the condition of your cable before use
and do not use if damaged.
• To protect your feet, always wear stout
shoes or boots - freshly cut grass is
damp and slippery.
Rubber or man-made footwear will
enhance your safety.
Do not operate your mower barefoot or
in open sandals.
Use protective equipment. Wear safety
spectacles or goggles whilst operating
your mower. Use ear protection if the
sound level seems uncomfortable when
using your mower.
Use a face mask if dusty.
Wear long trousers to protect your legs any debris left on the lawn or cutting path
may be picked up and ejected by the
The power supply cable should be
regularly inspected for signs of damage or
ageing, and only used if in good condition.
Always keep the power supply cable
away from the blades - be aware of its
position at all times.
Always be sure your mower is in a safe
operating condition.
Before using your mower, disconnect it
from the electrical supply and visually
check that the blade, blade nut and
cutter assembly are not worn or
damaged. A damaged blade or worn
blade nut is a major hazard and must be
replaced. Also check that the blade nut is
securely fastened.
Always check that your lawn or cutting
path is clear of all sticks, stones, wire
and other debris. Contact with such
debris may be dangerous or may
damage your mower and could be
thrown by the blade.
• When tilting the handle downwards (or to
the side) to start your mower, do not tilt it
more than is absolutely necessary.
Always ensure that both hands are in the
operating position and feet are well away
from the blades before returning your
mower to the ground.
Your mower will continue to run
for a short time after releasing
the switch lever. Always allow
your mower to stop on its own.
• Release the switch lever to turn your
mower off and remove the plug from
the mains:
Whenever you leave your mower
• Before checking, cleaning, adjusting
or working on your mower.
• Before clearing a blockage.
• If your mower starts to vibrate
abnormally (check immediately).
• After striking a foreign object, inspect
your mower for damage and make
repairs as necessary.
Never run your mower whilst lying on its
side or attempt to stop the blade always allow it to stop on its own.
Do not put hands or feet near or under
rotating parts.
Keep clear of discharge openings at all
Start your mower carefully according to
the instructions and with your feet well
away from the blade.
Do not use your mower in the rain and
do not allow it to get wet. Avoid using
your mower in wet grass, if possible.
Use your mower only in daylight or good
artificial light.
Do not pull your mower towards you or
walk backwards when in operation.
Do not cross gravel paths or roads whilst
the tines are rotating.
Always be sure of your footing,
particularly on slopes.
Always cut across the face of slopes, never
up and down. Exercise extreme caution
when changing direction on slopes.
Do not cut excessively steep slopes and
always wear non-slip footwear.
Check the grassbag (if supplied) for wear
or damage and replace if necessary.
Never use your mower without the
grassbag in place.
Walk, never run. Do not force your mower.
Never pick up or carry your mower while
the motor is running.
Ensure the blade has stopped rotating
and take extreme care before lifting your
mower for and during transportation.
Never operate your mower with defective
guards or shields.
Maintenance and storage
• Store your mower in a dry place when
not in use, out of the reach of children.
Do not use solvents or cleaning fluids to
clean your mower - use a blunt scraper
to remove grass and dirt.
Always disconnect from the electrical
supply before cleaning.
Do not operate your mower if any parts
are defective; discard all defective parts
and fit new parts before use.
Keep all nuts, bolts and screws tight to
be sure your mower is in a safe working
Use only Black & Decker recommended
replacement parts and accessories.
Black & Decker’s policy is one of continuous
improvement to our products and, as such, we
reserve the right to change product specifications
without prior notice.
Double insulation
Your mower is double insulated.
This means that all external metal parts are
electrically isolated from the power supply.
This is achieved by placing an extra
insulation barrier between the electrical and
mechanical parts. Double insulation means
greater electrical safety and obviates the
necessity of having your mower earthed.
Electrical safety (UK only)
Your mower should always be switched off
at the mains before disconnecting any plug
and socket connector or extension cables.
Fuse replacement
If your mower is supplied with cable fitted
with a non-re-wireable plug:
• The plug is fitted with a 13 amp fuse
which is the recommended fuse for
your mower.
• Only use replacement fuses which are
approved to BS1362.
• When changing the fuse in your plug,
always ensure the fuse cover is refitted.
If the fuse cover is missing or damaged
do not use the plug.
Note: Fuses do not give personal protection
against electric shock.
Plug replacement
• Disconnect the plug from the supply.
• Cut off the plug and dispose of
immediately. Insertion of a detatched
plug into a 13 amp socket outlet may
result in electric shock.
• Only fit BS1363A approved plugs fitted
with the correctly rated fuse.
• The cable wire colours, or a letter, will be
marked at the connection points of most
good quality plugs. Attach the wires to
their respective points in the plug (see
below). Brown is for “Live” (L) and blue is
for “Neutral” (N).
• Before replacing the top cover of the
mains plug ensure that the cable restraint
is holding the outer sheath on the cable
firmly and that the two leads are correctly
fixed at the terminal screws.
Fit a
Fit the
Handle assembly (Fig. A - D)
Connect blue
to N (neutral)
Connect brown
to L (live)
Make sure that the
outer sheath of the
cable is held firmly
by the clamp
240 volts AC only.
Never use a light
Warning! Never connect live or neutral wires
to the earth pin marked “E” or
Note: Do not wire an extension cable directly
into your mower yourself. Instead, take your
mower to your nearest Black & Decker
service agent.
Increased safety can be obtained by having
a qualified electrician install a high sensitivity
(30mA) circuit breaker in the house wiring.
If you do not have such a circuit breaker
installed, or you do not wish to have one
installed, then we strongly recommend that
the electrical power to your mower be
supplied through a high sensitivity residual
current device (RCD). The RCD is designed
to provide a high degree of personal
protection against harmful electric current
should fault conditions occur.
Warning! The use of an RCD or other circuit
breaker unit does not release the operator of
your mower from the safety instructions and
safe working practices given in this manual.
Remove all the parts from the carton and
familiarise yourself with the individual parts of
your mower.
The main parts of your mower are your
mower body (1) which comprises the cutter
cover (2), motor cover (3), air vent shroud (5),
pivot blocks (6) and pivot pins (8).
The handle (10) comprises the lower handle
(11), the upper handle (12), switch box (13)
with switch lever (14) and safety lock-off
switch (15), electrical supply cable (16), the
cable clips (17), and the handle clamp
assemblies (18) which each comprise a wing
nut, washer and bolt.
Note: The electrical supply cable should be
positioned on the right-hand side of your
mower when viewed from the operating
position. Ensure that this is not damaged
or twisted before you begin to assemble
your mower.
Assemble the lower handle to your mower
body, as follows:
• Place the lower handle (11) into the pivot
blocks (6) on the cutter cover (2).
Note: It will be necessary to tilt the lower
handle towards the rear of your mower to
allow pivot pins (8) to fit correctly.
• Fit the pivot pins (8) through the holes in
the pivot block flanges (6) and through
the holes in the lugs on the lower
handle (11).
• Using a mallet, or similar tool, tap the
pivot pin (8) through the inner part of the
pivot block (6). The hooks on the end of
the pivot pin will click into position behind
the inner wall, retaining it in position.
• Repeat the process on the other side.
With the lower handle in position, assemble
the upper handle, as follows:
• Place the upper handle (12) over the
lower handle (11). Ensure the upper bend
is as shown in Fig. A.
• Align the holes in both the upper and
lower handles and fit a bolt (20) through
each hole. Fit a washer (21) to each bolt
and fit the wing nuts (22) on to the bolts.
Tighten each one with hand pressure only.
Note: Do not use a spanner or other
implement to tighten the wing nuts.
With the upper and lower handles
assembled, fit the switch box to the upper
handle, as follows:
Note: The switch box must be positioned on
the right-hand side of your mower.
Ensure that the electrical supply cable is
not twisted before you begin to assemble
the handle.
• Locate the two pins on the switch box (13)
with the holes in the upper handle (12).
• Fit the retaining plate (23) over the stem
of the handle (12) ans secure in position
using the two screws (24) provided.
Note: Do not overtighten these screws - light
pressure will be sufficient to hold the switch
box in position.
• Finally, secure the electrical supply cable
to the lower handle using the cable clip
(17) supplied.
Handle operation (Fig. E)
The handle has three positions, two storage
(park) positions and one operating position.
Positions 1 and 3 in Fig. E are the storage
(park) positions and F is the operating range.
For storage purposes, the handle assembly
can be set to position 2 or 3, as follows:
• With the handle in its working range F,
pivot the handle downwards until it
contacts the stops on the end of the
handle tube. This is the park position
2 for the handle.
• The handle can be moved to a park
position 3. Push the handle upwards in
the working range F, to the top position
1. Pull the handle upwards. While still
pulling the handle upwards, pivot the
handle down towards the ground to
position 3.
Height of cut adjustment (Fig. F & G)
Your mower employs a manual method of
height of cut adjustment. The method
involves changing the arrangement of the
spacers fitted between the impeller and the
blade, and applies to mowers fitted with the
steel or plastic blade cutting systems which
can be purchased as an accessory.
The following procedure assumes that the
steel blade is fitted. If the plastic blade
cutting system is fitted then take blade to
mean blade carrier. The blade carrier (25) is
shown in Fig. F.
The procedure for adjusting the height of cut
is as follows:
Caution: The plastic blade cutting system has
been designed to maintain lawns at a fixed
length, not for cutting long grass. We strongly
recommend that you use the steel blade to
cut your grass to the required length, then
use the plastic blade to maintain that length.
Ensure your mower is disconnected from
the mains supply.
• Place the handle assembly into position
3 (see “Handle operation”).
• Turn your mower over onto its side so
that the underside of the cutter cover
is exposed.
• Using a cloth placed over the blades or
heavy duty gloves to protect your hands,
grip the blade and, using the spanner
provided, loosen and remove the nut
(21) from the motor spindle. Turn the nut
in anti-clockwise direction to loosen it.
Note: If the plastic blade cutting system is
fitted then it will be necessary to grip the
blade carrier (25) firmly to prevent it from
turning (Fig. F).
• Remove the blade nut, white washer
(26) (if supplied), spacers and blade
(21-24) and re-assemble to give the cut
height required, showing the 6 cut
heights available.
• Once the cut height is selected,
re-assemble the blade, ensuring the
cutter blade (23) is assembled with the
cutting tips downwards as shown in
Fig. F and ensure the white washer
(26) is fitted to the blade nut.
• Ensure the blade nut (21) is tight.
Note: Your mower is supplied with the blade
height in position E (Fig. G).
• Always re-fit 3 spacers and never fit more
or your mower will become unsafe.
Carrying your mower
Disconnect your mower from the mains.
Remove the grassbox (if fitted), lower the handle to
the flat “park” position and then, holding one handle
near the pivot block and carry with the blade pointing
away from you.
How to use your mower (Fig. H & J)
Observe all the relevant warnings when
using your mower.
We recommend the directional method of
operation to obtain maximum cutting
performance from your mower and to reduce
the risk of the trailing extension lead from
entering the cutting path.
Place the bulk of the extension cable
on the lawn close to the starting point
(Fig. Ja position 1).
Your switch box incorporates a cable
restraint. To fix the cable to the restraint,
proceed as follows:
• Bring the socket end of the extension
cable from behind and connect it to your
mower plug.
• Form a loop on your extension cable
close to the switchbox.
• Push the loop through the slot from
the opposite side of the restraint hook,
position the loop over the hook and
pull the cable back through the slot.
Your cable will now be restrained.
• The extension cable should now fall
away from your mower and behind the
operator, ready for use.
Warning! Do not attempt to operate your
mower with one hand - you must guide it
with both hands.
• Lift the handle up to release it from the
park position.
• Tilt the unit slightly on its side to reduce
the risk of lawn damage whilst starting,
depress the safety lock-off button (15)
on the switchbox (13) (Fig. D), and whilst
still depressed pull the switch lever (14)
towards you. Your mower will start, and
you can now allow it to return to its
proper cutting position, and commence
• Proceed down the cutting area as
shown in Fig. Ja, working from position
1 towards position 2 and, on reaching
position 2, turn to the right and proceed
towards position 3. Continue to the end
of the cutting area, turn to the left, and
proceed towards position 4. Continue in
the same manner as shown in Fig. Ja,
always working away from the cable.
Do not adopt the method shown in
Fig. Jb, working towards the cable,
as this can be dangerous.
Your mower will continue to operate whilst
you are pressing the switch lever. If you
release it for any reason you will not be able
to press it again until you have pressed the
safety lock-off switch on the switch box.
This feature prevents accidental restart.
When you have finished using your mower
we recommend that you clean all debris
from it before putting it away. Refer to the
“Care and maintenance” section.
Note: To obtain the best results cut your
lawn or grassed area regularly and do not
cut when the grass is wet.
Changing to the plastic blade system
(Fig. K)
A plastic cutter blade system can be
purchased as an accessory for your mower.
This system comprises a blade carrier and a
number of blades.
The steel blade is designed to give a fine
finish in long or tough grass.
The plastic blade system can be used for
safer cutting in normal conditions. It should
not be used to cut tough or long grass as
the plastic blades are not designed for
this purpose.
To remove the steel blade and to fit the
plastic blade system, proceed as follows:
Warning! Disconnect your mower from the
electrical supply before fitting the plastic
blade system.
• Remove the steel blade as described in
“Height of cut adjustment” but retain the
two thicker spacers and the nut.
• If you wish to alter the height of cut
whilst fitting the plastic blade system
then follow the instructions given in
“Height of cut adjustment”.
• Using a damp cloth, clean the contact
faces of the spacer rings, removing any
grass or debris.
Fit any spacers necessary to give the
correct height adjustment, fit the blade
carrier (25) on to the motor spindle with
the ribbed face towards the impeller,
fit any remaining spacers and fit the nut.
Use a cloth or wear a heavy duty glove
to prevent the blade carrier from turning
and tighten the nut with the spanner
Note: Instructions on how to fit the blade
carrier to your mower are also given on a
label on the blade carrier.
• Attach two plastic blades (30) to the
blade carrier (25), by placing one blade
on each blade pivot (31) and pull the
blades outwards so that they are locked
into position.
• Your mower is now ready for use.
Overload protection
Your mower is fitted with overload protection.
The reset button (33) can be found on the switch box
(Fig. A).
If you work too quickly in long grass, or in heavy
cutting conditions, you may overload the motor.
This will be indicated by a significant drop in speed,
and eventually the overload protection will operate.
This is not a fault but a safety device to protect
your mower.
When this occurs, release the switch and wait for
2 to 3 minutes to allow the motor to cool, then press
the reset button (33) and restart by operating the
switch lever.
If the cut-out operates again within 10 minutes you
should increase the height of cut (see “Height of cut
adjustment”) and walk more slowly.
Severe overloading may result in a longer delay on
restarting. In such cases, after resetting, you should
allow the motor to cool.
Blade maintenance
Steel blades
The steel blade is designed to give a fine
finish in long or tough grass. The blade will
continue to cut even when it has become
blunt or burred. There is no need for it to be
razor sharp.
If, however, because of damage or wear the
cutting performance deteriorates, then your
mower may require a new blade, or at least
the existing blade to be sharpened.
We recommend that the steel blade is
sharpened or a new blade fitted at the
beginning of each season.
Plastic blades
Plastic blades will wear during use. This type
of blade cannot be sharpened and should be
discarded and new blades fitted when worn.
Note: Plastic blades should be replaced in
pairs, not singly.
A number of spare blades are supplied with
the plastic blade cutting system when
purchased separately.
Replacement blades are available from
Black & Decker service agents.
Warning! When fitting a new blade use only
the Black & Decker replacement part
specified for your mower - do not attempt to
fit any other blade.
Fitting a new blade
Observe all the relevant warnings before
changing blades.
Details on the fitment of new steel blades are
given in “Cut height adjustment”. Details on
the fitment of new plastic blades are given in
“Changing to the plastic blade system”.
Handy hints
• Before starting your mower on grass always tilt it
to one side slightly and allow it to run up to
maximum speed before commencing to cut the
grass. This will maximise the hover effect and will
prevent the blades from digging into the grass.
On long grass, above 10cm (4 inches), use two
cuts to get a close finish. We recommend that
the first cut should be taken with the blade set at
maximum height of cut and the second taken
with it set at medium or close. This will prove to
be easier and give a better overall finish to
your lawn.
Care and maintenance
The advice given in this section covers the
general care and maintenance of the main
body of your mower. Advice relating to the
blades is given in “Maintenance of blades”.
Warning! Do not use a cable which
shows signs of damage. Fit a new cable
completely - do not make any permanent or
temporary repairs.
• Always keep your mower clean and free
from grass cuttings, especially the
underside of the cutter cover and the air
• Check all electrical cables at regular
intervals, looking for signs of wear,
abrasion or other damage.
• At the end of each cutting session we
recommend that the build up of grass on
the underside of the cutter cover is
removed using a blunt scraper or the
spanner supplied.
• Remove grass cuttings from the slot
between the pivot block flanges.
• Clean all plastic components with a
damp cloth.
Caution: Do not use solvents or cleaning
fluids as these may damage the plastic
components of your mower.
Fault finding
If your mower does not operate correctly,
use the following table to locate the problem.
Warning! Always disconnect your mower
from the electrical supply before carrying out
any inspection.
Possible cause Remedy
Motor buzzes
Blade jammed. Disconnect from
but blade does
the electrical
not move.
Remove the
obstruction from
the blade.
No noise and
Faulty electrical Disconnect from
the blade does connection.
the electrical
not move.
Plug your mower
into an alternative
electrical supply.
Check if a new
fuse is required.
Re-tighten and
check all electrical
connections in the
extension cables.
Overload cutReset overload
out operates.
Motor stalled.
Poor cutting
The motor is
overloading in
long, thick
Disconnect from
the electrical
supply. Reset the
blade height
to a higher
Blade damaged Disconnect from
due to impact
the electrical
on large stones, supply. Check the
tree stumps,
blade for damage.
paving stones or Replace with a
similar objects. new blade,
if necessary.
What to do if your mower needs
For after sales service please refer to the section
‘Lawnmowers & Garden’ within your local
Yellow Pages.
Unwanted products and the
Should you find one day that your mower
needs replacement, or is of no further
use to you, think of the protection of the
environment. Black & Decker service agents
will accept your old mower and will dispose of
it in an environmentally safe way.
Black & Decker lawn and garden
This guarantee provides 36 months parts cover
and 12 months labour (UK), 24 months parts
cover and labour (Australia and New Zealand).
In all cases proof of purchase will be required.
lf your Black & Decker mower becomes defective,
within the guarantee period, due to faulty materials
and workmanship, we guarantee to either replace all
defective parts, or at our discretion, replace your
mower free of charge, provided that:
• Your mower is returned to one of our authorised
repair agents with evidence of purchase.
• Your mower has been used within the
parameters of its consumer classification.
• Your mower has not been used for hire purposes.
• Repairs have not been attempted by anyone
other than our authorised repair agents.
• The failure represents normal wear and tear.
This guarantee is offered as an extra benefit and is
additional to your statutory rights.
Our guarantee policy
Failures due to the following are not covered:
• Replacing worn or damaged blades, nylon line
and chains, or cables damaged during storage
or use. These are regarded as replacement items
which wear during normal usage.
• Failures as a result of sudden impact or obvious
• Failures due to usage not in accordance with
instructions and recommendations contained in
this manual.
The use of other than genuine Black & Decker
accessories and parts may damage or reduce the
performance of your Black & Decker mower and may
render the guarantee void.
Black & Decker after sales service
(UK, Australia and New Zealand only)
Black & Decker offers a nationwide network of
authorised service agents. The use of other than
genuine Black & Decker accessories and parts may
damage or reduce the performance of your
Black & Decker product and may also endanger the
user. The terms and conditions of the warranty may
also be effected.
It is our aim that all Black & Decker customers should
be totally satisfied with their Black & Decker product
and after sales service, if help or advice is needed
please contact a local Black & Decker authorised
repair agent who will be happy to help. Full details of
our after sales service can be obtained from any of
our Black & Decker authorised repair agents.
Other Black & Decker products
(UK only)
Black & Decker has a full range of outdoor power
tools that make life easy in the garden. If you would
like further information on other products, please
contact the Black & Decker Service Information
Centre at the address towards the back of this
manual, or contact your Black & Decker stockist.
String trimmers
Compost shredders
Blade trimmers
Cordless brooms
Cordless trimsaws
Cordless shrubbers
Cordless shears
EC Declaration of Conformity
We declare that unit:
conforms to 89/392/EEC, 89/336/EEC,
EN60335, 73/23/EEC, EN55014, EN55104
A weighted sound pressure 96dB (A)
A weighted sound power 109dB (A)
Hand/arm weighted vibration <2.5m/s2
Brian Cooke
Director of Engineering
Black & Decker Ltd, Spennymoor, County Durham
DL16 6JG United Kingdom
New Zealand
South Africa
United Kingdom
Black & Decker (A’asia) Pty Ltd
286-288 Maroondah Highway, North Croydon, Victoria 3136
Black & Decker
483 Great South Road, Penrose, Auckland
Black & Decker South Africa (Pty) Ltd
Suite no 107, PostNet X65, Halfway House 1685
Black & Decker
210 Bath Road, Slough
Berkshire SL1 3YD
Part no. 375813-22 10/97.1
03 9213 8200
03 9726 7150
09 579 7600
09 579 8200
011 314 4431
011 314 4435
01753 574277
848317 BAND MH
01753 551155
Data protection act: Tick this box if you prefer not to receive
information from Black & Decker or other companies.
Product catalogue number: GX302/_
County or state:
House number or name and street:
Address of the dealer where your lawnmower was purchased:
Address of the dealer where your lawnmower was purchased:
What was the price of your lawnmower?
Was your lawnmower bought as a replacement?
Was your lawnmoweryour first purchase?
Was your lawnmower a gift?
Date of your purchase:
South Africa: Black & Decker South Africa (Pty) Ltd, Suite no 107, PostNet X65, Halfway House 1685
United Kingdom & Ireland: PO Box 821, Slough, Berkshire, SL1 3AR
Please complete this section immediately after the purchase of your lawnmower
and post it to the Black & Decker address in your country (above).
If you live in Australia or New Zealand, please register your purchase by using the
alternative guarantee card supplied.
Part no. 375813-22 10/97.1
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