Keep your professional or high-end homeowner chainsaw running like new with the STIHL Service Kit. This genuine maintenance set is specifically designed for the STIHL MS 271 and MS 291, as well as newer configurations of the MS 311 and MS 391. By performing regular tune-ups, you protect your engine's internal components from fine dust and debris, ensuring peak power delivery and reliable starting performance.
The STIHL Service Kit features the advanced HD2 Air Filter system, providing a significant upgrade in filtration compared to standard filters. This kit includes the high-capacity 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, allowing your saw to run more efficiently during demanding wood-cutting tasks.
Compatibility Note: This kit (Part # 1141 007 1800) fits MS 311 models with a serial number greater than 295 938 526 and MS 391 models with a serial number greater than 295 938 026.
What’s Included in Service Kit 41
High-Performance HD2 Air Filter (1141 120 1604)
- Superior Dust Retention: Made from polyethylene filter material with pores up to 70% finer than fabric or polyamide filters, trapping even the smallest dust particles.
- Oil and Water Repellent: The HD2 filter is easy to clean and maintains its structural integrity even in damp or oily conditions.
- Longer Service Intervals: Designed for heavy use, this filter allows for longer run times between cleanings compared to standard air filters.
Genuine Fuel Pick-Up Filter (0000 350 3504)
- Premium Screening: Protects the high-performance carburetor jets by filtering out fine contaminants and moisture from the fuel tank.
- Unrestricted Flow: Ensures a steady, clean supply of fuel to the engine, preventing "bogging" or power loss during heavy cuts in large timber.
NGK BPMR7A Resistor Spark Plug
- Reliable Ignition: Provides a sharp, consistent spark for easier cold starts and a smooth, stable engine idle.
- Heat-Resistant Design: Engineered to withstand the high-temperature environment of professional-grade 2-stroke engines.
- EMI Protection: Features an internal resistor to reduce electromagnetic interference, protecting the saw's ignition system.
Technical Specifications & Compatibility
| STIHL Kit Number | Service Kit (1141 007 1800) |
| Compatible Models | MS 271, MS 291, MS 311 (with Serial No. greater than 295 938 526) MS 391 (with Serial No. greater than 295 938 026) |
| Filter Type | HD2 (Polyethylene) |
| Spark Plug Gap | 0.020" (0.5 mm) |