Overview
This 2-piece set provides aftermarket replacement C6-2 trimmer heads for Stihl curved-shaft gas, electric, and battery-powered string trimmers. It replaces OEM part number 4006 710 2126 (also referenced as 4809 011 4130 for C5-2 variants). If the factory dual-line head on your Stihl trimmer is cracked, the spool cap is stripped, or the bump-feed mechanism no longer advances line, this drop-in replacement restores smooth line feeding at a fraction of the dealer price.
Key specifications
- Quantity: 2 trimmer heads per package
- Head type: C6-2 dual-line bump-feed (Easy Spool)
- Shaft type: Curved shaft
- Replaces OEM part: 4006 710 2126 (C6-2)
Compatibility
Fits a broad range of Stihl curved-shaft trimmers including gas models FS 38, FS 40, FS 40 C-E, FS 45, FS 45 C-E, FS 46, FS 50, and FS 50 C-E (2008 and later); battery models FSA 60 R and FSA 86 R; electric models FSE 60, FSE 71, and FSE 81; and KombiSystem powerheads KM 56 RC-E, KM 94 R, and KM 111 R. Verify your model number against Stihl’s parts lookup to confirm fitment.
Installation notes
Power off the trimmer and disconnect the battery or spark plug. Unscrew the existing head by turning it clockwise (left-hand thread) while holding the shaft lock button. Thread the new C6-2 head onto the output shaft counterclockwise until hand-tight. Wind trimmer line onto the spool following the directional arrows molded into the housing, then snap the cover back on and pull line through the eyelets.
Common questions
Q: Will this C6-2 replacement head fit my STIHL FSA 60 R battery trimmer, and is it also compatible with the FS 38 and FS 40 C-E?
Yes, this replacement head is listed for the STIHL FSA 60 R and also for models including FSE 60, FSA 86 R, FS 38, FS 40, FS 40 C, FS 40 C-E, FS 45 C-E, and FS 50 C-E. As long as your trimmer matches the compatible models in the listing and uses the C6-2 style head replacing part number 4006 710 2126, it should be the correct fit.
Q: How do I install this 40067102126 trimmer head on my STIHL FS 45 C-E, and do I need any special tools?
Installation is typically straightforward: lock the gearbox/shaft if your unit has a locking point, remove the old head, and thread the new C6-2 head on in the correct direction for your model. In most cases you only need basic hand tools, but it helps to check your trimmer manual first so you don’t force the head or cross-thread it.
Q: Does this 2-piece C6-2 head come preloaded with line, and what maintenance helps it last longer on an FSA 86 R?
Many replacement heads do not always arrive preloaded, so it’s best to verify that in the listing details and be ready to load the correct trimmer line if needed. To extend head life, keep the spool clean, avoid bumping it into concrete or fence lines, and periodically open it to remove packed grass and check for wear on the spool and eyelets.
