What's the difference between a RTE115C and a string trimmer?
The Weed EATER RTE115C is a specific electric line trimmer model; “string trimmer” is the generic name for the same type of tool that cuts grass and weeds with spinning nylon line. In everyday use, “Weed Eater,” “Weed wacker,” and “string trimmer” often refer to the same tool.
What the names usually mean
- RTE115C: Your exact model number; it identifies the correct parts, line size, and operating instructions.
- String trimmer / line trimmer: The general product type (any brand, gas or electric).
- Weed Eater: Commonly used as a nickname for string trimmers; it is also used as a brand name on some products.
Model-specific details that matter for RTE115C
Your RTE115C uses 0.065 inch (1.65 mm) round trimmer line and advances line automatically at startup (you should not bump the head on the ground to feed line). For the correct operating and safety steps, use the RTE115C owner's manual.
Quick comparison
| Term you see | What it refers to | Why it matters when ordering parts |
|---|---|---|
| RTE115C | A specific Weed EATER electric line trimmer model | Ensures the right spool cap, guards, and other model-fit parts |
| String trimmer | Generic tool category | Not enough detail to guarantee part fit |
| Weed Eater | Common nickname and sometimes a brand label | Still use the model number to match parts |
Why it matters
Parts and consumables are model-dependent. For example, if your spool cap is cracked or won’t stay latched, matching the part to RTE115C helps you avoid fit issues; the line trimmer spool cap 530403810 is one example of a model-specific replacement part.
Last updated: February 2026
How to feed string trimmer line?
To feed line on the Weed EATER RTE115C electric line trimmer, wind the correct 0.065-inch (1.65 mm) round line onto the spool in the direction shown (counterclockwise), leave 4 to 6 inches out, then thread the line through the guide ring and reinstall the cap hand-tight (see the owner's manual).
Before you start (safety and the right line)
- Unplug the trimmer before changing or feeding line.
- Use only 0.065-inch (1.65 mm) round trimmer line.
- Never use wire, rope, or string; it can break and become dangerous.
- Inspect the cutting head and guard; replace cracked or damaged parts.
- Keep air vents clear to prevent motor overheating.
How to refill the spool with line (manual method)
- Cut 25 feet of 0.065-inch (1.65 mm) round line.
- Insert one end into the center cavity of the empty spool.
- Wind the line so it feeds counterclockwise (follow the arrow on the spool).
- Stop with 4 to 6 inches (10 to 15 cm) left unwound from the center.
How to install the spool and “feed” the line through the head
- Set the replacement spool into place.
- Thread the line through the line guide ring.
- Rest the guide ring on the spool and place the line into the slot.
- Keep the line in the slot while reinstalling the cap; tighten hand tight only using the line trimmer spool cap 530403810.
Quick reference specs
| Item | What to use on RTE115C |
|---|---|
| Line diameter | 0.065 in (1.65 mm) |
| Line shape | Round |
| Refill length | 25 ft |
| Wind direction | Counterclockwise |
| Line left out | 4 to 6 in |
Why it matters
Correct diameter and winding direction help the cutting head advance line properly, reduce jams, and prevent premature wear on the spool and cap.
Last updated: February 2026
Why do landscapers take the guard off string trimmers?
Landscapers sometimes remove the guard (debris shield) to improve sightlines for edging and to maneuver faster in tight areas, but on the Weed EATER RTE115C the guard is a key safety feature. Our guidance is to keep the shield installed and use the trimmer as described in the RTE115C owner's manual.
What the guard does on the RTE115C
The guard helps control where debris goes and supports safe operation while the cutting line is spinning.
- Helps reduce the chance of rocks, glass, and other debris being thrown toward the operator
- Helps keep hands and legs farther from the spinning line and trimmer head
- Works with the line limiter blade to keep line at the intended cutting length
- Helps protect the tool during edging and trimming near the ground
Common reasons pros remove guards (and the tradeoffs)
Some crews remove guards for speed and visibility, especially when edging long runs. The tradeoff is higher risk and more mess.
| What they want | What changes when the guard is removed |
|---|---|
| Better visibility at the edge | More debris thrown, less protection from the spinning line |
| Faster coverage in open areas | Harder to control debris direction and line length |
| Easier access in tight spots | Greater chance of damaging the head or nearby objects |
Safer ways to get cleaner edging without removing the guard
Use the features built into the trimmer and set it up correctly.
- Switch to edging position using the twist-and-edge function (rotate the lower portion 180°)
- Keep the cutting head below waist level and maintain firm footing
- Let only the tip of the 0.065 inch (1.65 mm) round line contact the edge; do not force the line
- Do not tap the head on the ground to advance line (this can break parts)
- Replace a cracked or loose spool cap so the head stays secure during operation (see line trimmer spool cap 530403810)
Why it matters
The manual’s safety guidance is built around operating with guards and fasteners in place. Keeping the guard installed reduces thrown-object hazards and helps the trimmer cut at the intended line length for more predictable control.
Last updated: February 2026
Does RTE115C still make string trimmers?
The RTE115C is a specific Weed Eater electric line trimmer model, not a company, so it does not “make” string trimmers. If you are asking whether Weed Eater-branded string trimmers are still sold, the brand has continued to be used on outdoor power equipment, and you can still maintain your RTE115C with the correct replacement parts listed for this model.
How to confirm you have the right model
Use these quick checks so you order the correct spool, cap, or hardware for your trimmer:
- Match the model number on the unit label to RTE115C
- Compare your cutting head and cap style to the diagrams in the owner's manual
- Use only the recommended 0.065 inch (1.65 mm) trimmer line for this model
- Avoid wire, rope, or heavy line; it can damage the head and create a safety hazard
Parts you can replace on the RTE115C
The manual lists several user-replaceable service parts, and this model page includes common items such as the cap.
| What you are replacing | What it does | Common symptom when worn |
|---|---|---|
| Spool cap | Secures the spool and keeps line feeding correctly | Cap loosens, line tangles, head won’t stay together |
| Trimmer line (0.065 in) | Cutting media | Poor cutting, frequent breakage, excessive vibration |
| Wing nut/plate hardware | Secures handle or guard components (varies by assembly) | Loose guard/handle, rattling |
If your cap is cracked or won’t tighten by hand, replace the line trimmer spool cap 530403810.
Why it matters
Using the correct line diameter and keeping the spool and cap in good shape helps the cutting head run smoothly, reduces line jams, and prevents premature wear on the motor and head components.
Last updated: February 2026


