Replacement Part List
11
2.  Place the safety guard over the motor housing as shown. 
Align the holes. Fix with the original 4 safety guard screws. 
Tighten to secure (Fig. 7).
Installing + Changing Blade
NOTE: When you rst purchase your trimmer + edger,  
the blade will come separately with the machine. Refer only to 
the instructions for tting the SharperBlade
TM
 (Step 3). Should 
you need to replace the blade in the future, follow all the steps 
in this section.
1.  Switch o the machine and remove the battery. Wait until 
the machine comes to a complete stop. 
2.  Loosen the screw knob by screwing it counterclockwise. 
Remove the screw knob to expose the worn blade and the 
washer (Fig. 8). 
3.  Assemble the new SharperBlade
™
 to the cordless grass 
trimmer + edger with the washer placed in the middle 
(Fig. 5). Fix the whole assembly with the screw knob.  
Twist clockwise to secure.
Operation
The cordless grass trimmer + edger is designed to cut grass 
and weeds under bushes, and on slopes and edges that 
cannot be reached with the lawn mower. The trimmer + edger 
must be used outdoors only, at an ambient temperature 
between 32ºF (0ºC) and 113ºF (45ºC).
mWARNING! Remove stones, small sticks and other 
objects from the cutting area. The SharperBlade
™
 continues to 
rotate for a few seconds after the trimmer + edger is switched 
o. Let the motor come to a complete stop before switching 
the trimmer + edger back on. Do not rapidly switch the trimmer 
+ edger o and on.
mWARNING! Rocks or debris may ricochet or be thrown 
into eyes and face, cause blindness, or other serious injury. 
Never lean over the trimmer head and always wear eye 
protection. 
When operating the machine, check for the following:
• Wear eye protection and heavy clothing.
• Hold the rear handle with one hand and auxiliary handle 
with the other hand. 
• Keep the trimmer + edger below your waist level.
• Cut only from your right to your left to ensure debris is 
thrown away from you. Without bending over, keep the 
trimmer + edger near and parallel to the ground.
mWARNING! Use only Sun Joe
®
 SharperBlade
™
 trimmer 
+ edger replacement blade (Model SB10-BLD-3PK) with this 
unit. Other products will not work properly and will result in 
improper cutting head function or can cause serious injury. 
Do not use other materials such as steel blades, wire, string, 
rope, etc. Other materials can break o during cutting and 
become a dangerous missile that can cause serious injury.
ON/OFF Switch
1.  Insert the battery into the battery compartment on the 
back of the machine. Press until it clicks into position. 
Press and hold the safety button, then squeeze the  
ON/OFF switch and release the safety button (Fig. 9).
Safety guard
Fig. 7
Safety guard 
screws
Motor 
housing
Screw knob
Fig. 8
SharperBlade
™
Washer
Fig. 9
Safety button
ON/OFF switch










