Most Sun Joe string trimmers use 0.063 in. (1.6 mm) nylon trimmer line. The GTS4002C Lawn Care System grass trimmer uses 0.055 in. (1.4 mm) line. The length of line on each spool depends on your model, so check the chart below. For the best results, always use the same type of line that came with your trimmer.
Models Covered in This Article
- X20-TRIM-2A — 20V ECOSHARP cordless X20 12-inch trimmer and edger
- 24V-ST14 — 24V cordless 12-inch string trimmer and edger kit
- 24V-ST14-CT — 24V cordless 12-inch string trimmer and edger, tool only
- GTS4002C — 24V cordless Lawn Care System (grass trimmer, hedge trimmer and pole saw)
- TRJ13STE — electric 13-inch grass trimmer and edger
- TRJ608E — electric 10-inch string trimmer (also included in the Lawn Lover Bundle)
Trimmer Line and Spool Chart
Select the manual link under your model for step-by-step instructions on replacing the spool and advancing the line.
| Model | Line Diameter | Line Length per Spool | Line Feed | Replacement Spool |
|---|---|---|---|---|
|
X20-TRIM-2A View manual |
0.063 in. (1.6 mm) | 3 m | Auto-feed | X20-TRIM-LINE (3 m trimmer lines, 4-pack) |
|
24V-ST14 / 24V-ST14-CT 24V-ST14 manual 24V-ST14-CT manual |
0.063 in. (1.6 mm) | 16.4 ft. (5 m) | Auto-feed | 24V-ST14-SPOOL (single-line) |
|
GTS4002C View manual |
0.055 in. (1.4 mm) | 16.5 ft. (5 m) | Auto-feed | GTS4002C-RS-6PK |
|
TRJ13STE View manual |
0.063 in. (1.6 mm) | 16.4 ft. (5 m), 8 ft. (2.5 m) per slot | Auto-feed | TRJ13STE-RS-6PK (dual-line, 6-pack) |
|
TRJ608E View manual |
0.063 in. (1.6 mm) | 9.8 ft. (3 m) | Semi-auto feed | TRJ608E-RS-6PK (single-line, 6-pack) |
Line Details by Model
X20-TRIM-2A
- Uses 0.063 in. (1.6 mm) nylon line. The kit comes with four 3 m trimmer lines.
- The auto-feed head advances line for you as the tip wears down. To advance line yourself, release the trigger while the trimmer is running, wait two seconds, then press the trigger again. The line extends about 1/4 in. each time.
- Do not bump the head on the ground to feed line. This can damage the trimmer.
24V-ST14 and 24V-ST14-CT
- Uses 0.063 in. (1.6 mm) nylon line. Do not use line thicker than 0.063 in. (1.6 mm).
- Each spool holds 16.4 ft. (5 m) of line. The replacement is the single-line spool, model 24V-ST14-SPOOL.
- To let out more line, press the brake button and pull the cutting line until it reaches the length of the safety guard.
GTS4002C
- The grass trimmer uses 0.055 in. (1.4 mm) nylon line, which is thinner than the other models in this article.
- Each spool holds 16.5 ft. (5 m) of line, and the kit comes with two pre-wound spools.
- The replacement factory-wound spool is model GTS4002C-RS-6PK.
TRJ13STE
- Uses 0.063 in. (1.6 mm) nylon line on a dual-line spool.
- Each spool holds up to 16.4 ft. (5 m) of line, with 8 ft. (2.5 m) in each slot.
- The auto-feed head advances line for you. To advance line yourself, release the trigger while the trimmer is running, wait two seconds, then press the trigger again. Do not bump the head on the ground.
- The replacement pre-wound spool is model TRJ13STE-RS-6PK (6-pack).
TRJ608E
- Uses 0.063 in. (1.6 mm) nylon line. Each spool holds 9.8 ft. (3 m) of line.
- The semi-auto feed advances line each time you stop and restart the trimmer. Any extra line is cut to length by the line trimming blade in the guard.
- The replacement is the single-line factory-wound spool, model TRJ608E-RS-6PK (6-pack).
Tips for Long-Lasting Trimmer Line
- Choose a pre-wound spool. Our manuals recommend replacing an empty spool with a new pre-wound spool. Winding line yourself is not recommended, because line that is not wound properly can stop the feed system from working.
- Use the right line. Only use the line size and type listed for your model. Using a different line can cause the trimmer to overheat or become damaged.
- Keep spare line fresh. Trimmer line can dry out over time. Store spare spools or bulk line in a resealable plastic bag with a tablespoon of water.
- Trim in mild weather. Nylon line breaks more easily in cooler weather. Check your manual for the lowest temperature for use. Several models should not be used below 50°F (10°C).
- Watch hard surfaces. Line wears faster when you trim along sidewalks and other rough surfaces.
Before Changing the Spool
Important: Turn off the trimmer and wait for the spool to stop completely. Remove the battery on cordless models, or unplug electric models, before you touch the spool or trimmer line.
Need More Help?
If you're not sure which line or spool fits your trimmer, or you need help finding a replacement spool, contact Shop Joe Customer Support. Have your model number ready, and we'll be happy to help you get back to trimming.