Cobra Electronics ST7100-CA User Manual

SAVE THIS MANUAL FOR FUTURE REFERENCE

INSTRUCTION MANUAL

ST7100-CA

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WARNING: IMPORTANT SAFETY WARNINGS AND INSTRUCTIONS

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.

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: This product contains chemicals, including lead, known to the State of

California to cause cancer, and birth defects or other reproductive harm. Wash hands after handling.

CAUTION: Wear appropriate personal hearing protection during use. Under some

conditions and duration of use, noise from this product may contribute to hearing loss.

READ ALL INSTRUCTIONS

TO REDUCE RISK OF INJURY:

• Before any use, be sure everyone using this tool reads and understands all safety

instructions and other information contained in this manual.

• Save these instructions and review frequently prior to use and in instructing others.

GENERAL SAFETY WARNINGS AND INSTRUCTIONS FOR ALL TOOLS

• ALWAYS WEAR EYE PROTECTION – Wear safety glasses or goggles at all times when

this appliance is in use. Safety glasses are available at extra cost at your local Black & Decker Service Center or authorized service facility. Always use face or dust mask if operation is dusty.

• GUARD – Do not use this appliance without guard properly 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 appliance 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 cutting line at all times.

• THE ROTATING LINE PERFORMS A CUTTING FUNCTION – Use care when trimming

around screens, fences and desirable plantings.

• KEEP CHILDREN AWAY – All visitors should be kept at safe distance from work area.

• IMPORTANT WARNING – When being used 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:

• WARNING: Make sure that other persons and pets are at least 100 ft. (30.5m) away.

• WARNING: To reduce the risk of rebound (ricochet) injury, work going away from any nearby solid object such as a wall, steps, large stone, tree, etc. Use great care when working close to solid objects, and, where necessary, do trimming by hand.

• AVOID ACCIDENTALLY STARTING – Don’t carry appliance with finger on trigger.

• DO NOT FORCE THE APPLIANCE – It will do the job better and with less likelihood of a risk

of injury at the rate for which it was designed.

• USE THE RIGHT APPLIANCE – Do not use this appliance for any job except that for which it

is intended.

• DON’T ABUSE CORD – Don’t yank cord from power supply. Keep cord from heat, oil,

and sharp edges.

• DAMAGE TO CORD – Keep power cord away from rotating line. If you damage the cord,

unplug it from the power supply before moving the tool or examining the damage. A damaged cord must be replaced before further use.

• DISCONNECT TOOL – When not in use, when replacing line, or prior to cleaning.

• DON’T OVERREACH – Keep proper footing and balance at all times.

• DAMAGE TO APPLIANCE – If you strike or become entangled with a foreign object, stop

tool immediately, check for damage and have any damage repaired before further operation is attempted. Do not operate with a broken hub or spool.

• AVOID DANGEROUS ENVIRONMENTAL CONDITIONS – Do not use electric appliances in

damp or wet locations. Don’t use the appliance in the rain.

• DO NOT OPERATE trimmer/edgers in gaseous or explosive atmospheres. Motors in these

appliances normally spark, and the sparks might ignite fumes.

• STORE IDLE APPLIANCES INDOORS – When not in use, appliances should be stored

indoors in a dry locked-up place out of reach of children.

• GROUND FAULT CIRCUIT INTERRUPTER (GFCI) protection should be provided on the

circuits or outlets to be used for the gardening appliance. Receptacles are available having built in GFCI protection and may be used for this measure of protection.

• SECURE EXTENSION CORD using the cord retainer shown in Figure 4.

• STAY ALERT– Watch what you are doing. Use common sense. Do not operate appliance

when you are tired.

• MAINTAIN APPLIANCES WITH CARE – Keep cutting edge sharp and clean for best

performance and to reduce the risk of injury. Follow instructions for lubricating and changing accessories. Inspect appliance cord periodically, and if damaged, have it repaired by an authorized service facility. Inspect extension cords periodically and replace if damaged. Keep handles dry, clean, and free from oil and grease.

• CHECK DAMAGED PARTS – Check for alignment of moving parts, binding of moving parts,

breakage of parts, mounting, and any other condition that may affect its operation. Before further use of the appliance, a guard or other part that is damaged should be repaired or replaced by an authorized service center unless otherwise indicated elsewhere in this manual.

WARNING: When servicing double insulated tools, USE ONLY IDENTICAL

REPLACEMENT PARTS. Replace or repair damaged cords.

WARNING: To prevent electrical shock hazard, use only with an extension cord suitable

for outdoor use. Always connect extension cords to a fused line or one protected by a circuit breaker.

• FOR HOUSEHOLD use only.

• KEEP GUARDS IN PLACE AND IN WORKING ORDER.

• KEEP HANDS AND FEET AWAY FROM CUTTING AREA.

ADDITIONAL SAFETY WARNINGS:

• EXTENSION CORDS. Make sure your extension cord is in good condition. When using an

extension cord, be sure to use one heavy enough to carry the current your product will draw. An undersized extension cord will cause a drop in line voltage resulting in loss of power and overheating. The table below shows the correct size to use depending on cord length and nameplate ampere rating. If in doubt, use the next heavier gauge. The smaller the gauge number, the heavier the cord. To reduce the risk of disconnection of the appliance from the extension cord during operation, use the extension cord retainer described in this manual.

WARNING: Outdoor use extension cords:

To reduce the risk of electric shock, use only with an extension cord intended for outdoor use, such as an extension cord of type SW-A, SOW-A, STW-A, STOW-A, SJW-A, SJOW-A, SJTW-A, or SJTOW-A.

DOUBLE INSULATION

NOTE: This symbol denotes Double Insulation. Double insulated tools are constructed

throughout with two separate layers of electrical insulation or one double thickness of insulation between you and the tool’s electrical system. Tools built with this insulation system are not intended to be grounded. As a result, your tool is equipped with a two prong plug which permits you to use extension cords without concern for maintaining a ground connection.

NOTE: Double insulation does not take the place of normal safety precautions when operating this tool. The insulation system is for added protection against injury resulting from a possible electrical insulation failure within the tool.

REPLACEMENT PARTS: When servicing all tools, USE IDENTICAL REPLACEMENT PARTS.

POLARIZED PLUGS

Repair or replace damaged cords. To reduce the risk of electric shock, this equipment has a polarized plug (one blade is wider

than the other). This equipment must be used with a suitable 3 wire outdoor extension cord. Polarized connections will fit together only one way. Make sure that the receptacle end of the extension cord has large and small blade slot widths. If the plug does not fit fully into the extension cord, reverse the plug. If it still does not fit, obtain a suitable extension cord. If the extension cord does not fit fully into the outlet, contact a qualified electrician to install the proper outlet. Do not change the tool plug or extension cord in any way.

IMPORTANT WARNINGS FOR STRING TRIMMERS

• The guard must be installed before trimming or edging - if not, the motor will overheat.

• When replacing the AFS outfeed line, use only .050” (1.27mm) diameter TWISTED line otherwise the unit will not function properly.

• When replacing the HDL fixed line use only Black & Decker part number # HDL-CA

• Do not bump the feed head against the ground - it will disrupt the feed mechanism.

• Angle tool slightly (5˚ to 10˚) when trimming.

• Always use the cord retainer.

• Wear long pants and substantial footwear to protect yourself from injury caused by flying debris. This is especially important when edging with the appliance.

SAVE THESE INSTRUCTIONS

Date Code:

KEY INFORMATION YOU SHOULD KNOW:

• The guard must be installed before trimming - if not, the motor will overheat,

and void your warranty.

• When replacing the line, use only 0.050” twisted line - otherwise the unit may

not function properly.

BEFORE RETURNING THIS PRODUCT

FOR ANY REASON PLEASE CALL

1-800-544-6986

IF YOU SHOULD EXPERIENCE A PROBLEM

WITH YOUR BLACK & DECKER PRODUCT,

CALL 1-800-544-6986

BEFORE YOU CALL, HAVE THE FOLLOWING INFORMATION AVAILABLE, CATALOG No., TYPE

No., AND DATE CODE. IN MOST CASES, A BLACK & DECKER REPRESENTATIVE

CAN RESOLVE YOUR PROBLEM OVER THE PHONE. IF YOU HAVE A SUGGESTION OR

COMMENT, GIVE US ACALL. YOUR FEEDBACK IS VITAL TO BLACK & DECKER.

Minimum Gage for Cord Sets

Volts Total Length of Cord in Feet

120V 0-25 26-50 51-100 101-150 240V 0-50 51-100 101-200 201-300

Ampere Rating

More Not more American Wire Gage Than Than 0- 6 18 16 16 14 6 - 10 18 16 14 12 10- 12 16 16 14 12 12- 16 14 12 Not Recommended

1. Trigger Lever - Levier de déclenchement

2. Main Handle - Poignée principale

3. Cable Restraint - Dispositif de retenue du câble

4. Power cord - Cordon d’alimentation

5. Secondary Handle - Poignée secondaire

6. Handle Knob - Bouton de poignée

7. Adj. Knob - Bouton de réglage

8. Cable Storage Hooks - Crochets de rangement du câble

9. Head - Tête

10. Guard - Dispositif de protection

11. Line Trimming Blade - Lame de coupe pour le fil

12. Spool Housing - Boîtier de la bobine

13. Cutting Line - Fil de coupe

14. Line Storage Pouch - Compartiment de rangement du fil

15. Tube - Manche

16. Spool Storage Position - Position d’entreposage de la bobine

25. Heavy Duty Line Cassette - Cassette du fil extra résistant

ASSEMBLY INSTRUCTIONS

ASSEMBLY

WARNING: To avoid serious injury, make sure that the tool is switched off and unplugged

before assembly.

FITTING THE GUARD (FIG. 1)

• Remove the screw (17) from the guard (10).

• Place the guard onto the tool as shown.

• Firmly press the guard until it snaps into place.

• Secure the guard with the screw.

WARNING: To avoid serious injury, never use the tool unless the guard is properly fitted.

FITTING THE SECONDARY HANDLE (FIG. 2)

• Place the handle (5) on the tool as shown.

• Adjust the handle to the most comfortable position. Use the markings as a guide.

• Pass the bolt (6) through the secondary handle and the main handle.

• Screw the bolt into the far side of the secondary handle. Do not overtighten the bolt.

STORING THE CASSETTE NOT IN USE (FIG. 3)

The tool has two cutting system cassettes:

• AFS: Autofeed System twin line for light trimming and edging.

• HDL: Heavy Duty Line cutting system for more overgrown areas.

The cutting system cassette not in use can be stored in the position provided (16).

• Align the tabs on the cassette with the cut outs (28) at the underside of the handle.

• Push the cassette into the handle until it snaps securely into place.

STORING THE HEAVY CUTTING LINE (FIG. 3)

• The unit is supplied with several pieces of spare heavy cutting line.

• The extra pieces of heavy cutting line can be stored securely in the recess in the handle (14).

RELEASING THE CUTTING LINE

For shipment purposes, the cutting line is taped to the spool housing.

• Remove the tape holding the cutting line (13) to the spool housing (12).

CONNECTING THE TOOL (FIG. 4)

• Connect the female plug of a suitable extension cord to the power inlet (4).

• Loop the cord through the cord restraint (3).

• Insert the plug into a receptacle.

OPERATING INSTRUCTIONS

CAUTION: To avoid tool damage, let the tool work at its own pace. Do not overload.

SETTING THE TOOL TO TRIMMING OR EDGING MODE (FIG. 5, 6 & 7)

The tool can be used in trimming mode as shown in Fig. 5 or in edging mode to trim overhanging grass along lawn edges and flower beds as shown in Fig. 6.

CAUTION: To avoid tool damage, do not use the heavy duty cutting system for edging.

TRIMMING MODE (FIG. 5 & 6)

For trimming, the trimmer head should be in the position shown in Fig. 5. If it is not:

• Depress the adjustment button (7).

• Rotate the head (9), while releasing the button.

• When the head is in position, the button will lock into place.

Note: The head will only rotate in one direction. EDGING MODE (FIG. 6)

For edging, the trimmer head should be in the position shown in Fig. 6. If it is not:

• Depress the adjustment button (7).

• Rotate the head (9), while releasing the button.

• When the head is in position, the button will lock into place.

Note: The head will only rotate in one direction.

CAUTION: To avoid tool damage, do not use the heavy duty cutting system for edging.

ADJUSTING THE HEIGHT OF THE TOOL (FIG. 7)

This tool has a telescopic mechanism, allowing you to set it to a comfortable height. There are three height settings. To adjust the height setting, proceed as follows:

• Depress the adjustment button (7).

• Gently pull the tube (15) in or out of the motor housing (9) to the desired height, while releasing the button.

• When the tube is in position, the button will lock into place.

SWITCHING ON AND OFF

• To switch the tool on, squeeze the trigger lever (1).

• To switch the tool off, release the trigger lever.

WARNING: To avoid serious injury, never attempt to lock the trigger lever in the on

position.

HINTS FOR OPTIMUM USE GENERAL

• In order to achieve optimum cutting results, only cut dry grass.

TRIMMING

• Hold the tool as shown in Fig. 5.

• Gently swing the trimmer from side to side.

• When cutting long grass, work in stages from the top. Take small cuts.

• Keep the tool away from hard objects and delicate plants.

• If the tool starts running slowly, reduce the load.

EDGING

Optimum cutting results are achieved on edges deeper than 2 inches.

• Do not use the tool to create edges. To create edges, use an edging spade.

• Guide the tool with edge guide on hard surface as shown in Fig. 6.

• To make a closer cut, slightly tilt the tool.

MAINTENANCE

WARNING: To avoid serious injury, switch off and unplug the tool before performing any

maintenance. Your tool has been designed to operate over a long period of time with a minimum of

maintenance. Continuous satisfactory operation depends upon proper tool care and regular cleaning.

• Regularly clean the ventilation slots in your tool using a soft brush or dry cloth.

• Regularly clean the cutting line and spool using a soft brush or dry cloth.

• Regularly use a blunt scraper to remove grass and dirt from the underneath of the guard.

FITTING A NEW SPOOL OF AFS CUTTING LINE (FIG. 8 & 9)

Complete cassettes containing a spool of cutting line are available from your Black & Decker Service Center (part no. AF7100-CA).

• Unplug the tool.

• Depress the tabs (18) and remove the cassette (19) from the cassette housing (12) in the trimmer head. Fig. 8.

• Grasp empty spool (20) with one hand and cassette with other hand and pull spool out from cassette. If lever in base of cassette becomes dislodged, replace in correct position before inserting new spool into cassette.

• Remove any dirt and grass from the cassette and housing.

• Take the new spool and push it onto the boss (Fig. 9) in the cassette. Rotate the spool slightly until it is seated.

• Unclip the end of one of the cutting lines and guide the line into one of the eyelets (21). Fig. 9. The line should protrude approx. 4-3/8 in. from the cassette.

• Unclip the end of the other cutting line and guide the line into the other eyelet. The line should protrude approx. 4-3/8 in. from the cassette.

• Align the cassette tabs (18) with the slots (22) in the housing. Fig. 8.

• Push the cassette onto the housing until it snaps securely into place.

CAUTION: To avoid tool damage, If the cutting lines protrude beyond the trimming blade

(11), cut them off so that they just reach the blade.

WINDING NEW LINE ONTO AN EMPTY SPOOL (FIG. 10 &11)

You may wind new cutting line onto an empty spool. Replacement packs of 0.050” cutting line are available from your Black & Decker Service Center.

• Remove the empty spool from the tool as described above.

• Remove any remaining cutting line from the spool.

• First wind new line onto the uppermost part of the spool.

- Feed 3/4 inch of cutting line into one of the line anchoring slots.

- 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 criss-cross. Fig. 10.

- When the wound cutting line reaches the recesses (24), cut the line. Fig. 11.

- Temporarily park the line in the holding slots (23) on one side of the spool as shown in the inset in Fig. 11.

• Repeat the above procedure for the second cutting line on the lower section of the spool.

• Fit the spool onto the tool as described in Fitting a New Spool of Cutting Line.

CAUTION: Before you begin trimming, only use the appropriate type of Black & Decker

cutting line. Ensure that cutting line is present in both sections of the spool. Fig. 9.

FITTING THE HDL CASSETTE (FIG. 12)

Your trimmer is shipped with the AFS cassette installed. To fit the HDL (Heavy Duty Line) cassette, proceed as follows:

• Unplug the tool.

• Keep the tabs (18) depressed and remove the AFS cassette (19) from the cassette housing (12) in the trimmer head. Fig. 8.

• Make sure a piece of heavy cutting line is correctly fitted to the HDL cassette, as described in Fitting a New Piece of Heavy Duty Cutting Line below. Fig. 12.

• Align the tabs on the HDL cassette with the slots (22, Fig. 8) in the cassette housing.

• Push the HDL cassette into the housing until it snaps securely into place.

FITTING A NEW PIECE OF HEAVY DUTY CUTTING LINE (FIG. 12)

Replacement pieces of heavy duty cutting line are available from your Black & Decker Service Center (part no. HDL-CA). To fit a new piece of cutting line, proceed as follows:

• Unplug the trimmer from its power source.

• Depress the tabs (28) and remove the HDL cassette (25) from the cassette housing (12, Fig. 8) in the trimmer head.

• Remove the used piece of line from the cassette.

• Remove any dirt and grass from the cassette and housing.

• Thread a new piece of line (26) through the holes in each side of the cassette.

• Place the metal ferrule (27) in position as shown.

19/25

14 16

10°

Boss Moyeu

Lever Levier

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