The STIHL 19mm x 13mm Combination Wrench / Scrench (Part Number: 4128-890-3400) is a versatile genuine OEM service tool engineered for field maintenance across STIHL trimmers, KombiSystems, pole pruners, and cut-off saws. Featuring a 19mm deep spark plug socket, a 13mm collar nut socket, and an integrated screwdriver tip, this multi-tool allows operators to swap spark plugs, tighten deflector and gearbox hardware, and perform fast side-cover adjustments on the jobsite.
- Genuine STIHL OEM Service Tool: Factory replacement part (Part # 4128-890-3400 / 4128 890 3400 / replaces 4180-890-3400) manufactured to exact tolerances for a non-slip grip on critical fasteners.
- 19mm x 13mm Dual Socket Layout: Combines a 19mm deep socket for standard spark plugs with a 13mm socket for drive case bolts, blade lock nuts, and line-head mounting hardware.
- Integrated Torque Screwdriver: Built-in T27 Torque tip facilitates belt tensioning, and housing access without needing extra tools.
- Heavy-Duty Commercial Construction: Forged from heat-treated, high-tensile steel to withstand jobsite torque without rounding fastener heads or shearing.
- Broad Model Compatibility: Standard maintenance tool for STIHL KombiMotors (KM 55, KM 90, KM 100, KM 130), trimmers/brushcutters (FS 55, FS 85, FS 90, FS 110, FS 130, FS 240), pole pruners (HT 101, HT 131), and select TS cut-off saws.