Read All Instructions

CAUTION: Failure to comply with the recommendations outlined in the key information section will void warranty.

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.

WARNING: ALWAYS use safety glasses. Everyday eyeglasses are NOT safety glasses. Also use face or dust mask if trimming operation is dusty. ALWAYS WEAR CERTIFIED SAFETY EQUIPMENT:

• ANSI Z87.1 eye protection (CAN/CPA Z94.3),

• NOSH/OSHA respiratory protection.

WARNING: Always wear proper personal hearing protection that conforms to ANSI S12.6 (S3.19) during use. Under some conditions and duration of use, noise from this product may contribute to hearing loss.

WARNING:

• ALWAYS WEAR EYE PROTECTION – Wear safety glasses or goggles at all times when battery pack is installed.

• GUARD – Do not use this trimmer 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 trimmer when barefoot or wearing open sandals. Wear heavy long pants to protect your legs. Wear protective hair covering to contain long hair.

• NYLON LINE – Keep all body parts, including face, hands and feet clear of rotating nylon line at all times.

• THE ROTATING LINE PERFORMS A CUTTING FUNCTION – Use care when trimming around screens and desirable plants.

• 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 trimmer 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 trimmer with finger on trigger.

• DO NOT FORCE THE Appliance – at a rate faster than the rate at which it is able to cut effectively.

• USE THE RIGHT Appliance – Do not use this trimmer 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 trimmer immediately, remove battery, check for damage and have any damage repaired before further operation is attempted. Do not operate with a broken hub or spool.

• REMOVE BATTERY – when not in use, when replacing line, or prior to cleaning.

• AVOID DANGEROUS ENVIRONMENTAL CONDITIONS – Do not use electric appliances in damp or wet locations. Follow all instructions in this Instruction Manual for proper operation of your trimmer. Don’t use the trimmer in the rain.

• DO NOT OPERATE portable electric trimmers in gaseous or explosive atmospheres. Motors in these trimmers normally spark, and the sparks might ignite fumes.

• STORE IDLE TrimmerS INDOORS – When not in use, trimmers should be stored indoors in a dry, locked-up place out of reach of children.

• STAY ALERT – Do not operate this unit when you are tired, ill, or under the influence of alcohol, drugs, or medication.

• Replacement Parts – When servicing use only identical replacement parts.

• MAINTAIN TRIMMERS 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 trimmer, a guard or other part that is damaged should be carefully checked to determine that it will operate properly and

LST420 specifications

Black & Decker is recognized for producing high-quality outdoor power tools, and their string trimmers, particularly the LST420, LST420R, LST400, and LST400R models, are exemplary of their innovation and commitment to efficiency. These cordless electric trimmers combine robust performance with user-friendly features, catering to both novice and experienced gardeners.

The LST420 and LST420R models feature a powerful 40V lithium-ion battery, ensuring extended run times and plenty of cutting power. Both models utilize a premium 12-inch cutting width, allowing users to trim and edge grass and weeds efficiently. Weighing in at around 6.5 pounds, these trimmers are lightweight, making them easy to maneuver and reducing user fatigue during extended periods of use.

One of the standout features of the LST420 and LST420R is the automatic feed spool, which continuously feeds the line when needed, eliminating interruptions during work. Furthermore, users can easily switch between trimming and edging modes with a simple turn of the shaft, thanks to the innovative pivoting head design. This feature enhances versatility, allowing users to achieve a professional finish on various landscaping tasks.

The LST400 and LST400R also sport the reliable 40V lithium-ion battery and 12-inch cutting width. However, these models feature a slightly different design. The LST400 is designed with a telescoping shaft that can be adjusted for different heights, offering added comfort and control for users of varying statures. With the addition of a secondary handle, it provides improved stability during operation.

All four models boast a relatively quiet operation compared to gas-powered trimmers, which adds convenience to residential areas while minimizing noise pollution. The efficient brushless motor technology found in these trimmers enhances durability and runtime, further highlighting Black & Decker's commitment to sustainability and user convenience.

In summary, the Black & Decker LST420, LST420R, LST400, and LST400R offer a blend of power, versatility, and user-friendly features. With their lightweight designs, automatic feed spooling, adjustable shafts, and efficient battery systems, they are ideal choices for maintaining a neat and tidy lawn while ensuring comfort and ease of use for the operator. These trimmers embody the brand's dedication to quality and innovation in outdoor power tools, making them a reliable choice for homeowners and gardening enthusiasts alike.