Black & Decker NST2118 Instruction manual

Model #
NST1118, NST2118
Model Numbers NST1118, NST2118
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• The guard must be installed before trimming or edging - if not, the
motor will overheat (page 6).
• When replacing the line, use only .065 inch diameter ROUND line
(B&D Model #AF-100 is recommended) - otherwise the tool will
not function properly (page 9).
Save this manual for future reference.
• Do not bump the feed head against the ground - it will disrupt the
feed mechanism.
Table of Contents
Safety Guidelines - Definitions..................................................2
Important Safety Warnings and Instructions.............................2
Important Safety Instructions for Battery Chargers...................4
Charging Procedure..................................................................5
Assembly / Adjustment.............................................................6
Operating Instructions...............................................................8
Replacement Accessories........................................................9
Service Information...................................................................12
Full Two-Year Home Use Warranty..........................................12
WARNING: When using electric gardening appliances, basic
safety precautions should always be followed to reduce risk of fire,
electric shock, and personal injury, including the following.
It is important for you to read and understand this manual. The
information it contains relates to protecting YOUR SAFETY and
PREVENTING PROBLEMS. The symbols below are used to help
you recognize this information.
DANGER: Indicates an imminently hazardous situation which,
if not avoided, will result in death or serious injury.
WARNING: Indicates a potentially hazardous situation which,
if not avoided, could result in death or serious injury.
CAUTION: Indicates a potentially hazardous situation which, if
not avoided, may result in minor or moderate injury.
NOTICE: Used without the safety alert symbol indicates a
potentially hazardous situation which, if not avoided, may result in
property damage.
Read All Instructions
• ALWAYS WEAR EYE PROTECTION – Wear safety spectacles
or goggles at all times when this tool is plugged in.
• GUARD – Do not use this tool without guard attached.
• DRESS PROPERLY – Do not wear loose clothing or jewelry.
They can be caught in moving parts. Rubber gloves and
substantial rubber soled footwear are recommended when
working outdoors. Don’t operate the tool when barefoot or
wearing open sandals. Wear long pants to protect your legs.
Wear protective hair covering to contain long hair.
• NYLON LINE – Keep face, hands and feet clear of rotating nylon
line at all times.
Use care when trimming around screens and desirable plantings.
• KEEP ALL BYSTANDERS AWAY – at a safe distance from
work area, especially children.
• IMPORTANT WARNING – When being used as an Edger,
stones, pieces of metal and other objects can be thrown out
at high speed by the line. The tool and guard are designed to
reduce the danger. However, the following special precautions
should be taken:
• MAKE SURE that other persons and pets are at least 100 feet
(30m) away.
• TO REDUCE THE RISK of rebound (ricochet) injury, work
going away from any nearby solid object such as wall, steps,
large stone, tree, etc. Use great care when working close to solid
objects and where necessary, do edging or trimming by hand.
• AVOID ACCIDENTALLY STARTING – Don’t carry plugged-in
tool with finger on trigger.
• DO NOT FORCE THE TOOL – at a rate faster than the rate at
which it is able to cut effectively.
• USE THE RIGHT TOOL – Do not use this tool for any job except
that for which it is intended.
• DON’T OVERREACH – Keep proper footing and balance at all times.
• DAMAGE TO UNIT – If you strike or become entangled with a
foreign object, stop tool immediately, unplug, check for damage
and have any damage repaired before further operation is
attempted. Do not operate with a broken hub or spool.
• DISCONNECT TOOL – when not in use, when replacing line, or
prior to cleaning.
not use electric tools in damp or wet locations. Follow all
instructions in this Instruction Manual for proper operation of your
tool. Don’t use the tool in the rain.
• DO NOT OPERATE portable electric tools in gaseous or
explosive atmospheres. Motors in these tools normally spark, and
the sparks might ignite fumes.
• STORE IDLE TOOLS INDOORS – When not in use, tools should
be stored indoors in a dry, locked-up place out of reach of children.
• STAY ALERT – Watch what you are doing. Use common
sense. Do not operate tool when you are tired.
• MAINTAIN APPLIANCES WITH CARE – Follow instructions in
maintenance section. Keep handles dry, clean and free from oil
and grease.
• CHECK DAMAGED PARTS – Before further use of the
appliance, a guard or other part that is damaged should be
carefully checked to determine that it will operate properly and
perform its intended function. Check for alignment of moving
parts, binding of moving parts, breakage of parts, mounting, and
any other condition that may affect its operation. A guard or other
part that is damaged should be properly repaired or replaced
by an authorized service center unless otherwise indicated
elsewhere in this manual.
• DO NOT immerse tool in water or squirt it with a hose. DO NOT
allow any liquid to get inside it.
• DO NOT store the tool on or adjacent to fertilizers or chemicals.
• DO NOT clean with a pressure washer.
• Keep guards in place and in working order.
• Keep hands and feet away from cutting area.
The label on your trimmer may include the following symbols. The
symbols and their definitions are as follows:
or Ac.......... alternating current load or current
......................Class I Construction
..................earthing (grounded)
terminal alert symbol
...................Class II .../min or rpm...revolutions or reciprocation Construction
per minute
(double insulated)
WARNING: Some dust created by this product contains
chemicals known to the State of California to cause cancer,
birth defects or other reproductive harm. Some examples of
these chemicals are:
• compounds in fertilizers
• compounds in insecticides, herbicides and pesticides
• arsenic and chromium from chemically treated lumber
To reduce your exposure to these chemicals, wear approved safety
equipment such as dust masks that are specially designed to filter out
microscopic particles.
Battery cap information
Battery storage and carrying caps are provided for use whenever
the battery is out of the unit or charger. Remove cap before placing
battery in charger or unit.
WARNING: Fire hazard. Do not store or carry battery so that
metal objects can contact exposed battery terminals. For example,
do not place battery in aprons, pockets, tool boxes, product kit
boxes, drawers, etc., with loose nails, screws, keys, etc.
Transporting batteries can possibly cause fires if the battery
terminals inadvertently come in contact with conductive materials
such as keys, coins, hand tools and the like. The US Department of
Transportation Hazardous Material Regulations (HMR) actually
prohibit transporting batteries in commerce or on airplanes (i.e.,
packed in suitcases and carry-on luggage) UNLESS they are
properly protected from short circuits. So when transporting
individual batteries, make sure that the battery terminals are
protected and well insulated from materials that could contact them
and cause a short circuit.
1. Switch
2. Battery
4. Collar (to adjust
height and edge)
5. Motor Housing
6. Edge Guide
1. This manual contains important safety and operating instructions.
2. Before using battery charger, read all instructions and cautionary
markings on (1) battery charger, (2) battery pack, and (3) product
using battery pack.
CAUTION: To reduce the risk of injury, charge only
Black & Decker Battery Packs. Other types of batteries may burst
causing personal injury and damage.
4. Do not expose charger to rain or snow.
5. Use of an attachment not recommended or sold by Black &
Decker may result in a risk of fire, electric shock, or injury to
6. To reduce risk of damage to electric plug and cord, pull by plug
rather than cord when disconnecting charger.
7. Make sure cord is located so that it will not be stepped on, tripped
over, or otherwise subjected to damage or stress.
8. An extension cord should not be used unless absolutely
necessary. Use of improper extension cord could result in a risk of
fire, electric shock or electrocution.
a. Two-wire cords can be used with 2-wire or 3-wire extension cords. Only round jacketed extension cords should be used, and we recommend that they be listed by
Underwriters Laboratories (U.L.). If the extension is to be used outside, the cord must be suitable for outdoor use. Any cord marked for outdoor use can also be used for indoor work. The letters “W” or “WA” on the cord jacket indicate that the cord is suitable for outdoor use.
b. An extension cord must have adequate wire size (AWG or American Wire Gauge) for safety, and to prevent loss of power and overheating. The smaller the gauge number of the wire, the greater the capacity of the cable; that is, 16 gauge has more capacity than 18 gauge. When using more
than one extension to make up the total length, be sure each
extension contains at least the minimum wire size.
3. Auxillary Handle
7. Guard
8. Spool
9. Lock-off button
Charging Procedure
Minimum Gauge for Cord Sets
VoltsTotal Length of Cord in Feet
0-25 26-50 51-100 101-150
0-50 51-100 101-200 201-300
Ampere Rating
More Not more
American Wire Gauge
Than Than
0 - 6
6 - 10
10 - 12
12 - 16
Not Recommended
FACTORY. CHarge battery pack for at least 9 hours
before use.
The charger is designed to use standard
household 120 volt 60 Hz power.
1. Plug the charger into any standard 120
Volt 60 Hz electrical outlet (figure 1).
2. Slide the charger onto the battery pack
as shown in figure 2 and let the battery
pack charge initially for 9 hours. After
the initial charge, under normal usage,
your battery pack should be fully
charged in 6 to 9 hours.
2a) During charging the green LED will appear.
2b) When charging is complete the green
LED will go off.
3. Unplug charger, and remove the battery
pack. Place the battery pack into the
tool until it “clicks” into place figure 3.
NOTE: To remove the battery
pack, press down on the
release button on the back of
the battery pack and slide out.
9. Use only the supplied charger when charging your unit. The use
of any other charger could damage the battery pack or create a
hazardous condition.
10.Use only one charger when charging.
11.Do not attempt to open the charger or the unit. There are no
customer serviceable parts inside. Return to any authorized
Black & Decker service center.
12.DO NOT incinerate battery packs even if they are severely
damaged or completely worn out.
13.Do not incinerate the batteries. They can explode in a fire. A
small leakage of liquid from the battery cells may occur under
extreme usage, charging or temperature conditions. This does
not indicate a failure. However, if the outer seal is broken and
this leakage gets on your skin:
a. Wash quickly with soap and water.
b. Neutralize with a mild acid such as lemon juice or vinegar.
c. If the battery liquid gets in your eyes, flush them with clean water for a minimum of 10 minutes and seek immediate medical attention. MEDICAL NOTE: The liquid is a 25-35% solution of potassium hydroxide.
Important Charging
1. After normal usage, your
battery pack should be fully
charged in 6 to 9 hours. If
the battery pack is run-down
completely, it may take up
to 9 hours to become fully
charged. Your battery pack was sent from the factory in an
uncharged condition. Before attempting to use it, it must be
charged for at least 9 hours.
2. DO NOT charge the battery pack in an air temperature below
+40°F(+4.5°C), or above +105°F (+40.5°C). This is important
and will prevent serious damage to the battery pack. Longest life
and best performance can be obtained if battery pack is charged
when air temperature is about 75°F (24°C).
3. While charging, the charger may hum and become warm to touch.
This is a normal condition and does not indicate a problem.
4. If the battery pack does not charge properly—(1) Check current
at receptacle by plugging in a lamp or other appliance. (2) Check
to see if receptacle is connected to a light switch which turns
power off when you turn out the lights. (3) Move charger and
battery pack to a surrounding air temperature of 40°F (+4.5°C)
to 105°F (+40.5°C). (4) If the receptacle and temperature are
ok, and you do not get proper charging, take or send the battery
pack and charger to your local Black & Decker service center.
See Tools Electric in yellow pages.
5. The battery pack should be recharged when it fails to produce
sufficient power on jobs which were easily done previously. DO NOT
CONTINUE using unit with its battery pack in a depleted condition.
6. The battery pack will reach optimum performance after being
cycled 5 times during normal usage. There is no need to run the
battery pack down completely before recharging. Normal usage is
the best method of discharging and recharging the battery pack.
Storage Recommendation
1.Store tool:
a.) with the battery pack removed and on the charger.
b.) in a place that is cool and dry away from direct sunlight and excess heat or cold.
c.) out of the reach of children.
2. For prolonged storage such as over the winter, the battery pack
should be fully charged and then removed from the charger. It
should be charged again just prior to use.
Leaving the Battery Pack in the Charger
It is OK to leave battery packs on charge for long periods of time.
The charger has a maintenance mode which gives the battery
pack enough charge to stay “topped off”. If however, the tool is not
expected to be needed for more than 30 days, unplug the charger
and store battery pack in a cool, dry location. NOTE: A battery
pack will lose its charge when kept off of the charger. If the battery
pack has not been kept on maintenance charge, it may need to be
recharged before use. A battery pack may also lose its charge if left
in a charger that is not plugged into an appropriate AC source.
- Phillips Screwdriver
installing the guard
WARNING: remove
the battery from the
tool before attempting d
to attach the guard,
edge guide or handle.
PLACE. The guard must
always be on the tool to
protect the user.
• Turn the trimmer upside down
so that you are looking down
at the spool cap (a).
• Turn the guard (b) upside
down and slide it fully onto
the motor housing (c). Make
sure the tabs (d) on the
guard engage the ribs (e) on
the motor housing as shown.
• Continue to slide the guard on
until you hear it “snap” into place.
The locking tab (10) should snapped into the housing slot (11).
• Using a phillips screw- driver, insert the guard screw as shown
in figure 5 to complete the guard assembly.
• Once the guard is installed,
remove the covering from the line
cut-off blade, located on the edge of
the guard
Attaching the Auxiliary
Handle (NST1118)
The handle (3) is shipped with the screw
partially threaded in to prevent loss.
To attach the handle:
1. Remove the screw.
2. Slide the handle onto the handle
housing as shown in figure 6.
3. Thread the screw back into the
hole and tighten securely with a
• Push the handle completely 9
onto the housing and position
it slightly until it “snaps” into
place (figure 9).
• To adjust the handle up or
down, press in on the button
(g) and raise or lower the
• The handle should be
adjusted so that your front
arm is straight when the
trimmer is in the working
HEIGHT adjustment
CAUTION: Adjust the
length of the trimmer to obtain
proper working positions as
shown in figure 11.
Attaching the Auxiliary
Handle (NST2118)
• To attach the handle, press in on
the buttons (f) on both sides of the
upper housing as shown in figure 7.
• The overall height of the
trimmer can be adjusted by
loosening the collar (4) and
rotating it in the direction of
the arrow shown in figure 10.
• Move the upper housing
straight up or down. When
the desired height is
achieved, tighten the collar
by rotating it opposite of the
direction shown in figure 10.
• Position the handle as shown in
figure 8 (with the Black & Decker
logo facing upward). Partially push
the handle on so that it will hold
the buttons in when you release
them with your hand.
WARNING: Always use proper eye protection that conforms
to ANSI Z87.1 (CAN/CSA Z94.3) while operating this power tool.
WARNING: Remove the battery before making any assembly,
adjustments, or changing accessories. Such preventive safety measures
reduce the risk of starting the trimmer accidentally.
CAUTION: Before you begin trimming, only use the
appropriate type of cutting line.
CAUTION: Inspect area to be trimmed and remove any wire,
cord, or string-like objects which could become entangled in the
rotating line or spool. Be particularly careful to avoid any wire which
might be bent outwardly into the path of the tool, such as barbs at the
base of a chain link fence.
Switching on and off
• To switch the tool on, push the lock off button (9), and squeeze
the trigger lever.
• To switch the tool off, release the trigger lever.
5 -10
convert to edging mode
WARNING: When being used as an
Edger, stones, pieces of metal and other
objects can be thrown out at high speed by the
line. The trimmer and guard are designed to
reduce the danger. However, MAKE SURE that
other persons and pets are at least 100 feet
(30m) away.
• To operate as a
maintenance edger,
turn the collar (h) as
shown in part 1 of
figure 12.
• Hold the metal
shaft and rotate the lower housing 180° as
shown in part 2.
• Turn the collar (h) until tight.
• Position the trimmer above the surface as
shown in figure 13.
• Return to the trimming position
by loosening the lock collar and
rotating the lower housing back
180°. Turn the collar until tight.
OPERating the Trimmer
• With the unit on, angle unit and slowly swing 11
the trimmer side to side as shown in figure 11.
• Maintain a cutting angle of 5° to 10°
as shown in figure 11a. Do not exceed
10°(figure 11b). Cut with the tip of the line. To
keep distance from hard surfaces use edge
guide (6).
• Maintain a minimum distance of 24 inches
(609.6 mm) between the guard and your
feet as shown in figure 11c. To acheive
this distance adjust the overall height of the
trimmer as shown in figure 10.
Cutting Line / LINE FEEDING
Your trimmer uses .065 inch (1.65 mm) diameter, ROUND nylon
line. During use, the tips of the nylon lines will become frayed and
worn and the special self feeding spool will automatically feed and
trim a fresh length of line. Cutting line will wear faster and require
more feeding if the cutting or edging is done along sidewalks
or other abrasive surfaces or heavier weeds are being cut. The
advanced automatic line feeding mechanism senses when more
cutting line is needed and feeds and trims the correct length of line
whenever it’s required. Do not bump unit on ground in attempt
to feed line or for any other purposes.
• Remove battery from tool.
• Depress the tabs (j) and
remove the spool cap (k) from Replacement
the spool housing (l) in the
trimmer head (figure 14).
• For best results, replace
Model #
spool with Black & Decker
model # AF-100.
• Grasp empty spool with one
hand and spool housing with
other hand and pull spool out.
CAUTION: Before you begin trimming, only use the appropriate
type of cutting line.
Use Black & Decker replacement spool Model No. AF-100.
Reload nylon line (either bulk or prewound replacement spool) as
shown in this manual.
• USE ONLY .065 inch (1.65 mm) DIAMETER ROUND NYLON MONOFILAMENT LINE. Do not use serrated or heavier gauge
line, as they will overload the motor and cause overheating. This
line is available at your local dealer or authorized service center.
• Other replacement parts (guards, spool caps, etc.) are available
through Black & Decker service centers. To find your local service
location call: 1-800-544-6986 or visit
WARNING: The use of any accessory not recommended by
Black & Decker for use with this tool could be hazardous.
• If lever (m) (figure 15) in
base of housing becomes
dislodged, replace in correct
position before inserting new
spool into housing.
• Remove any dirt and grass
from the spool and housing.
• Unfasten the end of the
cutting line and guide the line
into the eyelet (n) figure 16.
• Take the new spool and
push it onto the boss (o)
(figure 15) in the housing.
Rotate the spool slightly until it
is seated.
The line should protrude
approximately 5-3/8 inches (136mm) from the housing.
• Align the tabs on the spool
cap with the slots (p) in the
housing (figure 16).
• Push the cap onto the
housing until it snaps securely
into place.
CAUTION: To avoid
tool damage, if the cutting
line protrudes beyond the
trimming blade, cut it off so
that it just reaches the blade.
• Insert the 3/4 inch (19mm)
end of the bulk line into
the hole (s) in the spool
adjacent to the slot as
shown in figure 18. Make
sure the line is pulled tight
against the spool as shown
in figure 18.
ROUND diameter line)
Bulk line is also available for purchase from your local retailer.
NOTE: Hand wound spools from bulk line are likely to become
tangled more frequently than Black & Decker factory wound
spools. For best results, factory wound spools are recommended.
To install bulk line, follow the steps below:
• Remove battery from tool.
• Remove the empty spool from the tool as described in
• Remove any remaining
cutting line from the spool. 17
• Make a fold at the end of
the cutting line at about 3/4
inch (19mm)(q). Feed the
cutting line into one of the
line anchoring slots (r) as
shown in figure 17.
• Wind the cutting line onto the spool in
the direction of the arrow on the spool. Make sure to wind the line on neatly and
in layers. Do not crisscross (figure 19).
• When the wound cutting line reaches
the recesses (t), cut the line. (figure 18).
• Fit the spool onto the tool as described
Tool runs slowly
WARNING: To avoid serious injury, remove the battery from the tool before performing any maintenance.
1. Keep the air intake slots clean to avoid overheating.
2. Your trimmer line can dry out over time. To keep your line in top
condition, store spare pre-wound spools or bulk line in a plastic,
sealable bag with a tablespoon of water.
3. Plastic parts may be cleaned by using a mild soap and a damp rag.
4. The line cutter on the edge of the guard can dull over time. It is
recommended you periodically touch-up the sharpness of the
blade with a file.
repairs, maintenance and adjustment should be performed by
authorized service centers or other qualified service organizations,
always using identical replacement parts.
• Check that the spool housing can rotate freely. Carefully clean it if
• Check that the cutting line does not protrude more than
approximately 5-3/8 inches (136mm) from the spool. If it does, cut
it off so that it just reaches the line trimming blade.
Automatic line feed does not work
• Keep the tabs depressed and remove the spool from the spool
housing in the trimmer head.
• Pull the cutting line until it protrudes approximately 5-3/8 inches
(136mm) from the spool. If insufficient cutting line is left on the
spool, install a new spool of cutting line.
• Ensure that the line is not crisscrossed on the spool as detailed
in figure 19. If it is, unwind the cutting line, then wind it back on
the spool neatly so that the lines do not cross.
• Ensure the beginning of the cutting line is pulled tight against the
spool as shown in figure 18.
• Align the tabs on the spool cap with the cut outs in the housing.
• Push the spool onto the housing until it snaps securely into place.
• If the cutting line protrudes beyond the trimming blade, cut it
off so that it just reaches the blade. If the automatic line feed
still does not work or the spool is jammed, try the following
• Carefully clean the spool and housing.
• Remove the spool and check if the lever in the spool housing
can move freely.
• Remove the spool and unwind the cutting line, then wind it on
neatly again. Replace the spool into the housing. Battery Recycling and the RBRC™ Seal
The RBRC™ (Rechargeable Battery Recycling
Corporation) Seal on the nickel-cadmium battery (or
battery pack) indicates that the costs to recycle the
battery (or battery pack) at the end of its useful life have
already been paid by Black & Decker. In some areas, it is illegal to
place spent nickel-cadmium batteries in the trash or municipal solid
waste stream and the RBRC program provides an environmentally
conscious alternative.
RBRC in cooperation with Black & Decker and other battery
users, has established programs in the United States and Canada
to facilitate the collection of spent nickel-cadmium batteries.
Help protect our environment and conserve natural resources
by returning the spent nickel-cadmium battery to an authorized
Black & Decker service center or to your local retailer for recycling.
You may also contact your local recycling center for information on
where to drop off the spent battery, or call 1-800-8-BATTERY.
free warning label replacement: If your warning labels
become illegible or are missing, call 1-800-544-6986 for a free
All Black & Decker Service Centers are staffed with trained
personnel to provide customers with efficient and reliable power
tool service. Whether you need technical advice, repair, or genuine
factory replacement parts, contact the Black & Decker location
nearest you. To find your local service location, call: 1-800-5446986 or visit
LATIN AMERICA: This warranty does not apply to products sold
in Latin America. For products sold in Latin America, check country
specific warranty information contained in the packaging, call the
local company or see the website for warranty information.
Imported by
Black & Decker (U.S.) Inc.,
701 E. Joppa Rd.
Towson, MD 21286 U.S.A.
Black & Decker (U.S.) Inc. warrants this product for two years
against any defects in material or workmanship. The defective
product will be replaced or repaired at no charge in either of two
The first is to return the product to the retailer from whom it was
purchased (provided that the store is a participating retailer).
Returns should be made within the time period of the retailer’s
policy for exchanges (usually 30 to 90 days after the sale). Proof of
purchase may be required. Please check with the retailer for their
specific return policy regarding returns that are beyond the time set
for exchanges.
The second option is to take or send the product (prepaid) to a
Black & Decker owned or authorized Service Center for repair or
replacement at our option. Proof of purchase may be required.
This warranty does not apply to accessories. This warranty gives
you specific legal rights and you may have other rights which vary
from state to state or province to province. Should you have any
questions, contact the manager of your nearest Black & Decker
Service Center. This product is not intended for commercial use.