String Trimmer Stihl Trimmer Head Spool C3-2 - for FSA 57 FSE 52 FSA57 FSE52 Weed Eater
Set of four C3-2 trimmer head spools for Stihl FSA 57 and FSE 52 string trimmers.
C3-2 trimmer head spool dimensions diagram showing top, bottom, and side views with 2mm line measurements.
Six-step instructional guide for installing a C3-2 trimmer head spool on a Stihl string trimmer.
Close-up of C3-2 trimmer head spool showing durable ABS housing and polyamide nylon cutting line.
Infographic showing C3-2 trimmer head spool compatibility with Stihl FSA 57 and FSE 52 string trimmers.
C3-2 trimmer head spool for Stihl FSA 57 and FSE 52 string trimmers shown in use on a lawn.
C3-2 trimmer head spool made of high-grade nylon polyamide for Stihl FSA 57 and FSE 52 string trimmers.
Person using a Stihl C3-2 trimmer head to fix common string trimmer performance issues in a lawn.
Pack of four C3-2 trimmer head spools for Stihl string trimmers with BlueStars brand marketing information.
Set of four C3-2 trimmer head spools for Stihl FSA 57 and FSE 52 string trimmers.
C3-2 trimmer head spool dimensions diagram showing top, bottom, and side views with 2mm line measurements.
Six-step instructional guide for installing a C3-2 trimmer head spool on a Stihl string trimmer.
Close-up of C3-2 trimmer head spool showing durable ABS housing and polyamide nylon cutting line.
Infographic showing C3-2 trimmer head spool compatibility with Stihl FSA 57 and FSE 52 string trimmers.
C3-2 trimmer head spool for Stihl FSA 57 and FSE 52 string trimmers shown in use on a lawn.
C3-2 trimmer head spool made of high-grade nylon polyamide for Stihl FSA 57 and FSE 52 string trimmers.
Person using a Stihl C3-2 trimmer head to fix common string trimmer performance issues in a lawn.
Pack of four C3-2 trimmer head spools for Stihl string trimmers with BlueStars brand marketing information.
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Stihl Trimmer Head Spool C3-2 - for FSA 57 FSE 52 FSA57 FSE52 Weed Eater

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C3-2 Trimmer Head Spool 4009 710 4305

Key Features

  • Package contains four (4) replacement spools.
  • Pre-wound with trimmer line for immediate use.
  • Designed for trimmer heads with automatic line feed systems.

Replaces / Cross-Reference Part Numbers

  • 4009 710 4305
  • 4009 710 4306

Compatibility & Fitment

  • Fits Stihl trimmers equipped with the C3-2 trimmer head.
  • Compatible Models: Stihl FSE 52, Stihl FSA 57.
  • Important Note for FSA 57: This spool is only compatible with FSA 57 trimmers with a serial number beginning with 5 (e.g., 5XXXXXXXX). Please verify your serial number before purchasing.

When to Replace

  • Trimmer line is fully depleted from the existing spool.
  • The spool is cracked, warped, or will not unwind smoothly.
  • Line feeding becomes inconsistent or frequently jams.

Installation Tips

  • Always disconnect the power source (remove battery) before handling the trimmer head.
  • Depress the two tabs on the side of the trimmer head to remove the cap.
  • Remove the old spool and any debris from the housing.
  • Insert the new spool, aligning it correctly within the housing.
  • Thread the line ends through the eyelets on the trimmer head.
  • Reinstall the cap, ensuring it clicks securely into place.

FAQ

This spool is designed for Stihl AutoCut C3-2 trimmer head setups on the Stihl FSA 57 and FSE 52 string trimmers. It is also compatible with model formats FSA57 and FSE52. Please match your existing head style and part number before ordering.
This replacement spool cross-references Stihl part number 4009 710 4305. Related part numbers 4009 710 4306 and 4009 710 2106 are associated with the head or kit components, so please verify whether you require only the spool or the complete head assembly.
Common signs include line that will not advance correctly, a spool that is cracked or warped, line binding inside the head, uneven line payout, or the spool no longer seating properly in the C3-2 head. If the trimmer head itself is damaged, missing pieces, or no longer locks together securely, you may need more than just the spool.
No, replacing the spool is a quick maintenance task. On C3-2 setups, simply remove the head cover, lift out the old spool, clear out any packed grass or debris, and install the new spool so the line exits correctly through the eyelets. This typically takes 5 to 10 minutes and does not require special tools.
Inspect the trimmer head cover, spring, eyelets, and spool seat for wear or damage. Clean out wrapped grass, dirt, and melted line fragments inside the head. If the cover tabs are worn or the spring is weak, the spool may not feed properly even after replacement.
The most common causes are normal line abrasion, line overheating from heavy edging, dirt packed into the head, incorrect rewinding tension, and line fusing together after prolonged use. Running the trimmer against concrete, fences, or rocks also accelerates spool and line wear.
This product is the spool replacement. The spool part replaces 4009 710 4305. If your entire AutoCut C3-2 head is damaged, you may need the complete head assembly, which is identified by part number 4009 710 2106.