4138 640 1704 STIHL Chain Sprocket Cover – Genuine OEM Replacement 992521 This system is designed to

This system is designed to engage when the operator’s right hand completely releases the rear handle

This pulley plays a critical role in transferring engine power to the mower deck and drivetrain while maintaining proper belt alignment and engagement

engineered to maintain proper compression and sealing within the engine cylinder of compatible STIHL chainsaws

9660 – Plunger Interlock Switch Multi-Application (OEM Replacement Part)

Component Type: Rewind starter / recoil starter

4138 640 1704 STIHL Chain Sprocket Cover – Genuine OEM Replacement 992521 This system is designed to4138 640 1704 STIHL Chain Sprocket Cover Genuine OEM Replacement The STIHL Chain Sprocket Cover (4138 640 1704) is a genuine OEM replacement cover designed for use on select STIHL HT series pole pruners. This cover protects the chain sprocket and associated drive components from debris, impacts, and wear, ensuring smooth operation and long service life. Manufactured to STIHLs exact factory specifications, this OEM chain sprocket cover provides correct