The Sun Joe TRJ13STE Electric Grass Trimmer + Edger uses 0.063 in. (1.6 mm) diameter nylon trimming line and an auto-feed spool system.
The auto-feed system advances fresh trimming line as needed, so there is no need to bump the trimmer head against the ground.
Line Type
0.063-Inch Nylon Line
The TRJ13STE uses 0.063 in. (1.6 mm) diameter nylon trimming line.
Spool System
Auto-Feed
The trimmer automatically feeds additional line as the cutting line wears.
Important
Do Not Bump the Head
The TRJ13STE is not a bump-feed trimmer. Bumping the trimmer head to advance the line can damage the unit.
What Type of String Does the TRJ13STE Use?
Use 0.063 in. (1.6 mm) diameter nylon line.
The TRJ13STE product information lists a 16.4-foot spool and an auto-feed spool-advance system.
A factory-wound dual-line replacement spool is also specified in the operator's manual:
- Replacement spool model: TRJ13STE-RS-6PK
- Line diameter: 0.063 in. (1.6 mm)
The operator's manual recommends using a pre-wound replacement spool. Improperly winding the line can cause the auto-feed system to malfunction.
How Does the Auto-Feed System Work?
As the nylon line wears during trimming, the auto-feed mechanism supplies fresh line.
Line can wear more quickly when trimming along sidewalks or other abrasive surfaces, or when cutting heavier weeds.
Do not bump the trimmer head against the ground.
The TRJ13STE uses an auto-feed head. The operator's manual warns that attempting to bump-feed the string can damage the trimmer.
How to Advance More Trimmer Line
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Operate the Trimmer
With the unit running, release the ON/OFF switch trigger.
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Wait Two Seconds
Allow approximately 2 seconds before restarting the trimmer.
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Press the Trigger Again
Press the ON/OFF switch trigger again.
The line extends approximately 1/4 inch with each stop-and-start cycle until it reaches the proper length at the safety guard.
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Resume Trimming or Edging
Continue using the trimmer once the line has advanced.
Replacing the Spool
Unplug the trimmer before changing or working with the trimming line or spool.
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Remove the Spool Cover
Press the two release tabs on the spool cover and pull the cover straight off.
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Remove the Spool
Lift the sleeve and spool out of the hub and remove dirt or grass residue from the area.
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Install the Replacement Spool
Position the line through the appropriate slots and reinstall the spool into the hub.
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Reinstall the Spool Cover
Press the spool cover into position until it clicks securely into place.
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Reconnect and Start the Trimmer
Connect the trimmer to its power source and turn it on. The trimming line will be cut automatically to the proper length.
How to Wind Your Own TRJ13STE Spool
The operator's manual provides instructions for winding replacement nylon line onto the existing spool. Use 0.063 in. (1.6 mm) diameter nylon line.
Unplug the trimmer before removing the spool or handling the cutting line.
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Remove the Spool
Press both release tabs on the spool cover and pull the cover straight off. Lift the spool out of the hub.
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Cut the Replacement Line
Measure and cut an 8 ft (2.5 m) piece of nylon cutting line for one spool slot.
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Secure the Line
Insert approximately 5/8 in. (15 mm) of line into the hole inside the spool. Bend the line around the hole.
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Wind in the Marked Direction
Follow the arrows on the spool and wind the line with slight tension so it sits tightly and neatly.
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Repeat for the Second Slot
Wind the second spool slot using the same procedure. The manual specifies a maximum of 16.4 ft (5 m) total, or 8 ft (2.5 m) per slot.
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Reinstall the Spool
Feed each line end through its respective slot on the hub, gently press the spool into place, and reinstall the cover until it clicks securely. Reconnect the trimmer only after reassembly is complete.
Important: Follow the winding-direction arrows carefully. The manual also identifies TRJ13STE-RS-6PK as a factory-wound replacement option if you prefer not to rewind the spool.
If the Auto-Feed Does Not Work
The TRJ13STE manual lists several conditions that can prevent the auto-feed system from working correctly, including:
- The trimming blade is blocked by accumulated grass.
- The spool is bound.
- The auto-feed system is dirty.
- The spool line became twisted when it was refilled.
- Not enough trimming line is exposed.
Approved customer-safe checks include:
- Stop the trimmer and clean accumulated grass from the trimming area.
- Install a new spool of trimming line if needed.
- Keep the auto-feed area clean.
- Remove the spool cover and pull the cutting line until it reaches the trimming blade.
TRJ13STE Electric Trimmer Reference
The approved product information for the TRJ13STE lists:
- 4-amp electric motor
- 13-inch cutting swath
- 0.063-inch nylon line
- 16.4-foot spool
- Auto-feed spool advance
- Up to 7,800 RPM
- Rotating trimmer/edger head
- Adjustable telescoping pole and auxiliary handle
- Edger guide and flower guard
These line and spool specifications apply to the TRJ13STE Electric Grass Trimmer + Edger. Always review the product information and operator's manual for your exact model before selecting replacement trimming line or a spool.
Frequently Asked Questions
What size string does the TRJ13STE use?
The TRJ13STE uses 0.063 in. (1.6 mm) diameter nylon line.
Do I need to bump the trimmer head to advance the line?
No. The TRJ13STE uses an auto-feed system. Bumping the trimmer head to advance the line can damage the unit.
How do I manually trigger the auto-feed system?
With the trimmer running, release the ON/OFF switch trigger, wait approximately 2 seconds, and press the trigger again.
The line advances approximately 1/4 inch with each stop-and-start cycle until it reaches the proper length at the safety guard.
Which replacement spool does the TRJ13STE use?
The operator's manual identifies TRJ13STE-RS-6PK as the factory-wound dual-line replacement spool.
Can I rewind the spool myself?
Yes. Use 0.063 in. (1.6 mm) nylon line. Unplug the trimmer, remove the spool cover and spool, then cut 8 ft (2.5 m) of line for each spool slot. Insert 5/8 in. (15 mm) of line into the spool hole, bend it around the hole, and wind tightly in the direction shown by the spool arrows. Repeat for the other slot. The maximum total is 16.4 ft (5 m). Reinstall the spool and secure the cover. See How to Wind Your Own TRJ13STE Spool above for the complete steps.
Why does the trimming line wear faster near sidewalks?
The manual states that the cutting line wears faster when trimming along sidewalks or other abrasive surfaces, or when cutting heavier weeds.
Find Your Electric Trimmer
Visit the Shop Joe Trimmers + Edgers collection to locate your model and review its product information.
If you need help identifying your electric trimmer or confirming the correct trimming line or replacement spool for your model, Shop Joe Customer Care can help.