Restore the smooth, reliable power transfer of your STIHL chainsaw with the STIHL 3/8" 7-Tooth Spur Sprocket. This genuine OEM replacement part (1141 640 2003) is specifically engineered for the latest generation of mid-range saws, including the high-performance MS 261, MS 271, and MS 291. As a critical component of your saw's drive system, this spur sprocket is designed to provide precise chain engagement and consistent speed for demanding wood-cutting tasks.
Built from high-strength, heat-treated steel, this sprocket is manufactured to withstand the extreme centrifugal forces and friction generated by professional-grade powerheads. Its 7-tooth configuration is perfectly balanced to deliver maximum torque for 3/8" pitch chains, ensuring your saw maintains its "bite" even in dense hardwoods. Using a genuine STIHL spur sprocket ensures exact factory-spec alignment with your clutch assembly, protecting your crankshaft and extending the service life of your equipment.
Maintenance Tip: Inspect your spur sprocket for wear grooves regularly. To prevent premature chain damage and ensure peak safety, it is recommended to replace the sprocket after every two to three chain loops.
Key Features & Benefits
- Genuine OEM Quality: Factory-spec replacement part ensures perfect fitment and maintains tool warranty.
- Optimized Drive Ratio: 7-tooth design provides the ideal balance of chain speed and torque for 3/8" pitch systems.
- Enhanced Durability: Constructed from hardened steel to resist wear and heat deformation under heavy loads.
- Direct Compatibility: Engineered specifically for the newer MS 261, MS 271, and MS 291 chassis.
- Precision Engineering: Reduces vibration and ensures smooth chain travel for cleaner, faster cuts.
Technical Specifications & Fitment
| Manufacturer Part Number | 1141 640 2003 |
| Chain Pitch | 3/8" |
| Tooth Count | 7-Tooth |
| Sprocket Type | Spur Sprocket |
| Fits Models | MS 261, MS 261 C-M, MS 271, MS 291 |
