Overview
This 2-piece C26-2 trimmer head set is an aftermarket replacement for Stihl OEM part number 4002 710 2169, built for straight-shaft gas trimmers, battery trimmers, and KombiSystem powerheads. The C26-2 head is the larger sibling of the C6-2 and handles heavier-duty trimming with thicker line. When the original bump-feed mechanism stops advancing line or the spool housing cracks from years of use, this drop-in replacement restores reliable line feeding.
Key specifications
- Quantity: 2 trimmer heads per package
- Head type: C26-2 dual-line bump-feed
- Shaft type: Straight shaft
- Bolt adapter: 10 mm x 1.0 LHF (left-hand thread)
- Replaces OEM part: 4002 710 2169 (40027102169)
Compatibility
Fits Stihl gas string trimmers and brushcutters including FS 56 RC-E, FS 70 R, FS 80, FS 85, FS 87 R, FS 90 R, FS 91 R, FS 94 R, FS 111 R, FS 120, FS 130, and FS 131 R; battery-powered models FSA 56, FSA 80, FSA 90 R, FSA 120 R, FSA 130 R, FSA 135, and FSA 200; and KombiSystem powerheads KM 55, KM 56, KM 85, KM 90, KM 94, KM 100 through KM 130, and FS-KM line head. Always verify your model number with the Stihl parts catalog.
Installation notes
Shut off the trimmer and disconnect the spark plug or battery. Lock the output shaft and unscrew the existing head clockwise (left-hand thread) to remove it. Thread the new C26-2 head counterclockwise onto the adapter until hand-tight. Wind the appropriate diameter trimmer line onto the spool following the directional arrows, feed the line ends through the eyelets, and snap the spool cover closed. Test the bump-feed by tapping the head on firm ground while the trimmer idles.
Common questions
Q: Will this 40027102169 C26-2 trimmer head fit my Stihl FS 56 C-E or FSA 56 without any adapter?
Yes—this head is made as a replacement for the Stihl 40027102169 C26-2 and is intended to fit models listed in the compatibility range, including FS 56 C-E and FSA 56. If your unit currently uses the C26-2 style head, it should install directly, but it’s still smart to confirm your exact model and shaft/head setup against the listing before installing.
Q: How do I load line into this C26-2 head, and what line size works best?
This style head is typically used with dual line and is designed for quick reloading, but you should follow the same line diameter recommended for your specific trimmer model in the owner’s manual. For best performance, keep the line lengths even on both sides and avoid overfilling the spool, since that can cause feeding problems or extra vibration.
Q: Is this replacement head suitable for heavier units like the FS 91 R, FS 94 R, FS 111 R, or FS 131 R, and can it handle regular property maintenance?
Yes, this C26-2 replacement head is intended for several of those higher-powered Stihl trimmers, including FS 91 R, FS 94 R, FS 111 R, and FS 131 R, when the equipment matches the listed fitment. It’s a good choice for routine trimming around grass, edges, and light weeds, but you’ll get the best life from it by checking for debris buildup, replacing worn line promptly, and avoiding hard impacts with rocks or concrete.
