Ensure your chainsaw remains in peak operating condition with the STIHL Service Kit. This genuine maintenance set is specifically tailored for the STIHL MS 171, MS 181, and MS 211 chainsaws. By performing regular, proactive maintenance, you protect your engine's internal components from dirt and debris, guaranteeing reliable starts and consistent power delivery for all your wood-cutting tasks.
The STIHL Service Kit provides a convenient, all-in-one solution for your annual tune-up. It includes a high-performance fleece air filter, a specialized fuel filter, and a matched spark plug. Replacing these three core components as a set restores the factory-spec air-to-fuel ratio, helping your saw run cooler and more efficiently under heavy loads.
Maintenance Tip: For optimal performance, STIHL recommends installing a fresh service kit every 25 to 50 hours of operation. This simple step prevents common issues like hard starting, erratic idling, and loss of engine power.
What’s Included in Service Kit
High-Performance Fleece Air Filter (1139 120 1602)
- Enhanced Filtration: The specialized fleece material is designed to trap fine sawdust and micro-particles that standard filters might miss.
- Steady Airflow: Maintains optimal air intake levels to ensure the engine breathes properly, resulting in smoother acceleration and full RPM capability.
- Tool-Free Fit: Precision-molded to fit securely into the MS 171/181/211 air box for a perfect seal every time.
Genuine Fuel Pick-Up Filter (0000 350 3503)
- Contaminant Shield: Screens out fine debris and moisture from the fuel tank before they can reach the carburetor jets.
- Consistent Fueling: Helps prevent engine "bogging" or stalling by ensuring a clean, unrestricted flow of fuel to the combustion chamber.
NGK CMR6H Resistor Spark Plug (0000 400 7011)
- Modern Engine Match: The compact CMR6H is specifically engineered for the high-operating temperatures of modern low-emission STIHL engines.
- Easy Starts: Provides a sharp, reliable spark for faster cold starts and a more stable idle.
- EMI Protection: Features an internal resistor to reduce electromagnetic interference, protecting your saw's sensitive ignition module.
Technical Specifications & Compatibility
| STIHL Kit Number | Service Kit (1139 007 1800) |
| Compatible Models | MS 171, MS 171 C, MS 181, MS 181 C, MS 211, MS 211 C |
| Filter Material | Heavy-Duty Fleece |
| Spark Plug Gap | 0.028" (0.7 mm) |