523046X Clutch Drum for Stihl 021 023 025 MS210 MS230 MS250 GB ST305SCJ7N

Product Overview

This clutch drum is a direct-fit replacement part for select Stihl chainsaw models, transferring engine power to the chain via the centrifugal clutch. Designed for STIHL 021, 023, 025, MS210, MS230, and MS250 saws, it ensures reliable engagement and smooth cutting performance. The drum includes a splined hub and aligns with the starter pulley assembly for consistent operation.

Key Features & Performance

• Precision-machined steel construction for durability under high RPM
• Includes built-in needle bearing for reduced friction and wear
• Matches original OEM dimensions for a bolt-on installation
• Balanced design minimizes vibration during use
• Heat-treated surface resists deformation from clutch shoe contact

Fitment & Compatibility

• Stihl 021
• Stihl 023
• Stihl 025
• Stihl MS210
• Stihl MS230
• Stihl MS250
• Replaces OEM Part Numbers: 523046X, GB ST305SC-J7N

Common Uses

• Replacing worn or damaged clutch drums on Stihl chainsaws
• Restoring proper chain engagement during cutting operations
• Maintaining professional-grade saw performance for firewood, tree care, and construction

Technical Specifications

• Part Number(s): 523046X, GB ST305SC-J7N
• Material: Steel with integral needle bearing
• Fitment: Stihl 021/023/025/MS210/MS230/MS250
• Outer Diameter: Factory-spec diameter for listed models

Frequently Asked Questions

Q: Will this clutch drum work on my Stihl MS250? A: Yes, it is designed for the Stihl MS250 as well as the 021, 023, 025, MS210, and MS230 models.

Q: Do I need to replace the clutch shoes when installing this drum? A: It is recommended to inspect the clutch shoes and replace them if worn to ensure proper engagement and avoid premature drum failure.

Product appearance and specifications may vary slightly by batch. Compatibility may vary by serial number. Verify fitment before purchase.