Gear Box Gear Head For STIHL FS400 FS160 FS220 1108 640 3600 4128 0101

Product Overview

This gear box gear head is a direct replacement for the drive system on Stihl FS series trimmers. It transfers engine power to the cutting head, enabling efficient trimming and edging. Designed for Stihl FS400, FS160, and FS220 models, this gear head restores reliable performance for homeowners and landscapers.

Key Features & Performance

• Precision-machined gears for smooth power transfer and reduced vibration
• Direct OEM replacement fit for Stihl FS400, FS160, and FS220 trimmers
• Durable metal housing resists wear from heavy use
• Includes output shaft and bearing assembly for complete installation
• Matches OEM part numbers 1108 640 3600 and 4128 640 0101 for guaranteed compatibility

Fitment & Compatibility

• Stihl FS400
• Stihl FS160
• Stihl FS220

Common Uses

• Replacing worn or damaged gear heads on Stihl FS series trimmers
• Repairing edging and trimming equipment in commercial landscaping
• Restoring power transfer in residential lawn care tools

Technical Specifications

• Part Number(s): 1108 640 3600, 4128 640 0101
• Material: Hardened steel gears with aluminum housing
• Compatible Models: Stihl FS400, FS160, FS220

Frequently Asked Questions

Q: Will this gear head fit my Stihl FS250? A: This gear head is specifically designed for FS400, FS160, and FS220 models; it may not fit the FS250 without modification.

Q: Does this include the mounting hardware? A: The gear head comes as a complete assembly with shaft and bearing, but mounting bolts and gaskets are sold separately.

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