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trimmer/edger operation
WARNING: Read and under-
stand this owner's manual before
operating trimmer/edger. Make
certain you read and understand
all Safety Warnings on pages 1 and
2 of this manual. Improper use of
this trimmer/edger can result in
severe injury or death from fire,
electric shock, or body contact
with moving parts.
Extension Cords
Use proper extension cord with this tool.
Use only a polarized (i.e., one blade is
wider than the other), UL listed exten-
sion cord marked for outdoor use. The
cord must be marked with suffix W or
W-A following the cord type designation.
Example: SJTW-A or SJTW.
Use proper sized cord with this tool. Cord
must be heavy enough to carry current
needed. An undersized cord will cause volt-
age drop at trimmer/edger. The trimmer/
edger will lose power and overheat. Follow
cord size requirements listed below.
Cord Length
AWG Cord Size
25 feet
50 feet
100 feet
150 feet
Inspect cord often. Replace if damaged.
Connecting Extension Cord
WARNING: Fully seat the ex-
tension cord on the inlet plug or
power cord of tool. Failure to do
so could lead to overheating of
trimmer/edger. This could cause a
fire that results in personal injury
to you or others.
The trimmer/edger has a built-in extension
cord retainer. This cord hitch prevents ac-
cidental disconnection of the power cord
during use. The cord hitch is molded into
the rear handle.
1a. Model ST4514B: Plug power cord
into extension cord (see Figure 4-1).
1b. Model ST3812B: Plug extension cord
into inlet plug of tool (see Figure 4-2).
2. Create a loop in the extension cord
and insert through the bottom of the
tool housing (see Figure 4-3).
3. Pull the loop tight around the molded
cord hitch (see Figure 4-4).
Note: For Model ST4514B, an optional
method of retaining the extension cord
is shown in Figure 4-5. Use this method
with larger-gauge cords that may not fit
into the extension cord retainer.
18 AWG
16 AWG
16 AWG
14 AWG
Figure 4-1: Plugging extension cord into power cord,
Model ST4514B
Figure 4-2: Plugging extension cord into inlet plug,
Model ST3812B
Figure 4-3: Inserting extension cord loop through bottom
of handle
Figure 4-4: Pull extension cord loop tight around molded
cord hitch
Figure 4-5: Optional method of retaining extension cord
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