4237 890 3400 STIHL Combination Wrench – Genuine OEM Service Tool The STIHL Combination Wrench (4237 890 3400) is a genuine OEM multi-purpose service tool designed for maintenance, adjustment, and basic repairs on select STIHL hedge trimmers, sprayers, and earth augers. This combination wrench is commonly supplied as part of the factory tool kit and is used for tasks such as spark plug service, cutter bar adjustments, and general fastener tightening. Over time, tools can become lost, worn, or damaged through repeated use in professional field conditions. Replacing your missing or worn wrench with the correct OEM part ensures you have the proper STIHL-approved tool for safe servicing and correct fitment. Manufactured to STIHL factory specifications, this genuine combination wrench provides reliable durability and precise sizing for professional equipment maintenance. Product Details OEM Part Number: 4237 890 3400Brand: STIHL (Genuine OEM)Part Type: Combination Wrench / Service ToolApplication: Tools and extras kit for STIHL equipmentCondition: New Genuine OEM Part Function This STIHL combination wrench is designed to: Assist with spark plug removal and installation Support cutter bar and gearbox servicing Tighten and loosen common STIHL fasteners Replace missing or worn factory tool kit wrenches Provide convenient field maintenance capability ⚠️ Always use proper tools and follow STIHL service procedures during equipment maintenance. Verify Fitment (Recommended) Before ordering, confirm: OEM part number 4237 890 3400 Your unit model matches those listed below Application matches your STIHL illustrated parts diagram ⚠️ Service tools may vary by model and production version — always verify by OEM part number. Compatibility This OEM combination wrench is used across many STIHL hedge trimmers, sprayers, and auger models listed under Tools / Extras sections, including: Hedge Trimmers HS 81 R / HS 81 T / HS 81 TC-E(Cutter bar HS 86 / Tools & Extras) HS 82 R / HS 82 T(Tools, Extras) HS 86 R / HS 86 T(Cutter bar HS 86) HS 87 R / HS 87 T(Tools, Extras) HS 56(Gear head, Cutter bar HS 56-Z) HS 56 C-E(Gear head, Cutter bar HS 56 C-E Z) HS 46 C-E(Gear head, Cutter bar 550 mm) Sprayers SR 200 (Tools, Extras) Earth Augers BT 130 (Augers, Tools, Extras)BT 131 (Augers, Tools, Extras) (Exact fitment depends on tool kit configuration — always verify using OEM parts diagram.) Installation / Usage Notes Keep wrench stored in the unit’s factory tool holder or service kit Use for routine maintenance such as spark plug service Always follow STIHL torque specifications when tightening fasteners Replace damaged tools to prevent slipping or rounding fasteners ⚠️ For major repairs, professional servicing is recommended. Maintenance Tips Clean tool after use to prevent corrosion Store in a dry location with other service accessories Inspect tool edges regularly for wear Always use genuine STIHL OEM tools for proper fit and safe servicing
