90556352 ST4500.qxd: chainsaw booklet new 10/20/09 8:03 AM Page 8

b.Insert the end of the line no more than 1/8 in. into the hole and begin winding the line around the spool (figure 16).

Be sure to wind the line in the direction of the arrow in figure 17. Do not overfill spool. The spool holds 20 feet (6 m) of line.

c.Perform steps 3 and 4 above.

16

17

CAUTION: ALWAYS USE EYE PROTECTION.

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.

1.Angle unit as shown in figure 7.

2.Slowly swing trimmer side-to-side as shown in figure 8.

3.To convert for maintenance edging, turn off the tool. Holding the trimmer (as shown in figure 9) with one hand by the auxiliary handle, grasp the trimmer head collar, push in direction of arrow and rotate the trimmer head clockwise (when viewed from the switch end) until it stops, (half turn), release your hand. The tool is locked in the edger position.

4.To operate as a maintenance edger, position trimmer above sidewalk as shown in figure 10.

5.Return to trimming position by turning the tool off, pushing in direction of arrow and

rotating the trimmer head counter clockwise until it stops.

OPERATING INSTRUCTIONS FOR CATALOG # ST7600, ST7700 AUTO FEED SYSTEM

LINE FEED

Your trimmer uses .065 in. (1.65 mm) diameter, ROUND nylon line to cut grass and weeds quickly and easily. During use, the tip of the nylon line will become frayed and worn and the special self feeding line hub 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 its required. DO NOT BUMP unit on ground in attempt to feed line or for any other purposes.

CLEARING JAMS AND TANGLED LINES

From time to time, especially when cutting thick or stalky weeds, the line feeding hub may become clogged with sap or other material and the line will become jammed as a result. To clear the

jam, follow the steps listed

 

18

below.

1. Press the release tabs on the

 

line hub cap, as shown in

 

figure 18 and remove the cap

 

by pulling it straight off.

 

2. Lift the spool of nylon line out

 

of the hub and clear any

 

broken line or cutting debris

 

from the spool area. (If you

 

plan to replace the spool or

 

rewind it, this is the place to do so, otherwise, move on.)

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Black & Decker ST7700, 90556352 instruction manual Line Feed, Clearing Jams and Tangled Lines
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90556352, ST7700 specifications

The Black & Decker ST7700,90556352 is a versatile and powerful string trimmer designed to tackle tough landscaping tasks with ease and efficiency. With its robust design and cutting-edge features, this tool is perfect for both residential and commercial use, making lawn care a breeze.

One of the standout features of the ST7700 is its powerful 5 amp motor, which provides ample cutting power for trimming and edging tasks. This motor allows the trimmer to handle thick grass, weeds, and even light brush, ensuring that users can achieve a well-manicured lawn without the hassle of multiple passes. The trimmer’s cutting swath of 13 inches enhances productivity, allowing users to cover larger areas in shorter amounts of time.

The ST7700 employs a corded electric design, eliminating the need for gas and oil, which not only reduces environmental impact but also makes it easier to start and operate. This feature is particularly appealing for those looking to minimize maintenance and upkeep. Users simply plug in the trimmer and are ready to go, without worrying about fuel mixing or engine troubles.

In terms of comfort and usability, the Black & Decker ST7700 is designed with an adjustable handle that provides excellent ergonomics. The handle can be adjusted to different heights, accommodating users of various sizes and ensuring a comfortable grip during extended use. A lightweight design further enhances maneuverability, making it easy to navigate around flower beds, trees, and other obstacles.

Another notable technology in the ST7700 is its automatic feed spool, which helps to streamline the cutting process by ensuring a continuous supply of line without requiring manual adjustments. This allows users to focus on the task at hand without frequent interruptions, making the trimming process more efficient.

In summary, the Black & Decker ST7700,90556352 is a robust and user-friendly string trimmer ideal for homeowners and landscapers alike. With its powerful motor, efficient cutting swath, corded electric design, ergonomic handle, and automatic feed spool, it’s engineered to provide exceptional performance in maintaining tidy lawns. Whether trimming edges or tackling overgrown areas, this trimmer stands out for its reliability and ease of use, making it a valuable addition to any outdoor toolkit.
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