Stihl 3/8" Picco 7 Tooth Spur Sprocket Kit - MS192, MS193, MS194

Maintain precise cutting throttle and peak chain velocity on your specialized lightweight chainsaw with the genuine OEM STIHL 3/8" Picco 7-Tooth Spur Sprocket Kit. Expertly tailored to match the high-RPM power bands of the advanced 1137-series engine platforms, this factory replacement drum is built for both the top-handle (T) climbing models and standard rear-handle configurations of the MS 192, MS 193, and MS 194. Replacing a grooved or hooked drive spur restores immediate power transfer and protects your cutting loops from erratic binding.

This original equipment manufacturer assembly integrates a precision-machined 7-tooth spur gear directly onto a structurally reinforced steel drum shell. The 7-tooth design maximizes linear chain speed across smaller guide bars, enabling clean, rapid cuts during technical arbor work, property maintenance, and precision limbing. Case-hardened to meet strict factory standards, the spur faces guide the chain drive links smoothly into alignment, eliminating high-speed chatter and preventing premature chain stretch.

True OEM Integrity vs. Soft Aftermarket Metal: Lightweight arborist and pruning saws run at high structural RPMs that can quickly deform un-hardened aftermarket alloys. Imprecise non-OEM parts introduce loose tolerances on the crankshaft, leading to harmonic vibrations that ruin the internal needle cage bearing, strip the oil pump drive gear, and cause premature clutch shoe fatigue. A genuine STIHL drive assembly guarantees absolute concentricity and durability under daily commercial use.

Configuration & Application Note: Designed exclusively for STIHL 1137-series models configured with a 3/8" Low Profile (Picco) pitch chain (.043" or .050" gauge). This component will not accept standard .325" or full-profile .375" professional chain loops. The package contains the genuine integrated 7T spur sprocket drum body ready for direct installation.

Key Features & Benefits

• Optimized 7-Tooth Configuration: Maximizes linear cutting speed across the bar rail, streamlining high-production pruning and in-tree commercial maintenance.
• Unified Structural Spur Design: Integrated steel construction provides exceptional concentricity, preventing power loss and balancing centrifugal clutch dynamics.
• 100% Genuine OEM STIHL Manufacture: Crafted from proprietary heat-treated high-carbon steel to ensure long-lasting durability against severe structural loading.
• Smooth Drive Link Tracking: Hardened guide pathways cradle the chain chassis evenly, minimizing friction, heat build-up, and localized guide bar wear.
• Exact Crankshaft Interface: Inner hub bore dimensions match factory specifications perfectly to deliver a balanced, vibration-free rotation.
• Versatile Handle Adaptation: Engineered to drop seamlessly into both top-handle climbing models (T-series) and standard rear-handle chassis layouts.

Technical Specifications & System Components