Keep your chainsaw performing at its peak with the STIHL Service Kit. This genuine maintenance set is specifically designed for the STIHL MS 251 chainsaws. Regular maintenance is the most effective way to protect your engine from fine dust and debris, ensuring reliable starts, optimal fuel efficiency, and a longer overall service life.
The STIHL Service Kit provides a convenient, all-in-one solution for your seasonal tune-up. It includes a high-performance Fleece Air Filter, a specialized Fuel Filter, and a matched Spark Plug. Replacing these three essential components as a set restores the factory-spec air-to-fuel ratio and ignition timing, allowing your saw to deliver maximum power during heavy cutting tasks.
Maintenance Tip: To prevent power loss and hard starting, STIHL recommends installing a fresh service kit every 25 to 50 hours of operation or at the start of every cutting season.
What’s Included in Service Kit
High-Performance Fleece Air Filter (1143 120 1601)
- Superior Filtration: The specialized fleece material is designed to trap micro-fine sawdust particles that can cause premature engine wear.
- Engine Longevity: Maintains clean air intake, which is critical for protecting the cylinder and piston of high-RPM 2-stroke engines.
- Perfect Seal: Precision-molded to fit the MS251 air box, ensuring no "dirty" air bypasses the filter.
Genuine Fuel Pick-Up Filter (0000 350 3503)
- Clean Fuel Delivery: Screens out fine contaminants and moisture from the fuel tank before they reach the carburetor jets.
- Prevents Stalling: Ensures an unrestricted flow of fuel, helping to eliminate engine "bogging" or hesitation during acceleration.
NGK BPMR7A Resistor Spark Plug
- Consistent Ignition: Provides a sharp, reliable spark for easier cold starts and a steady engine idle under various temperature conditions.
- Anti-Fouling Design: Engineered to resist carbon buildup in the high-heat environment of a working chainsaw.
- EMI Protection: Features an internal resistor to reduce electromagnetic interference, protecting the saw's electronic ignition module.
Technical Specifications & Compatibility
| STIHL Service Kit | Service Kit (1143 007 1800) |
| Compatible Models | MS 251, MS 251 C |
| Filter Media | Heavy-Duty Fleece |
| Spark Plug Gap | 0.020" (0.5 mm) |