GEAR BOX GEAR HEAD FITS STIHL FS400 FS160 FS220 1108 640 3600 4128 640 0101

Gear Box Gear Head for Stihl

This gear box gear head is a direct replacement drive component designed to transfer power from the engine to the cutting attachment on compatible Stihl trimmers and brushcutters, referencing OEM cross-reference numbers 1108 640 3600 and 4128 640 0101.

Overview

This gear box gear head is a precision-machined drive assembly that converts engine rotation into the high-torque output needed for heavy-duty cutting tasks. It is built for Stihl FS400, FS160, and FS220 models, making it a reliable replacement for worn or damaged original units. The gear head ensures smooth power transfer and long service life in demanding landscaping applications.

Built For Performance

• Constructed from hardened steel gears for reduced wear and extended operational life
• Sealed bearing design protects internal components from debris and moisture
• Direct bolt-on fitment for quick installation without modification
• Precision-cut gears minimize vibration and noise during operation
• Compatible with standard trimmer heads and brushcutter blades

Fits These Machines

• for Stihl FS400
• for Stihl FS160
• for Stihl FS220

On-The-Job Use

• Ideal for replacing worn gear heads on commercial-grade string trimmers
• Commonly used in brush clearing and heavy weed cutting applications
• Suitable for both residential lawn care and professional landscaping crews

Specs At A Glance

Good To Know

Q: Will this gear head fit my Stihl FS400? A: Yes, this gear box gear head is designed to fit Stihl FS400, FS160, and FS220 models, but always verify your unit's serial number for exact compatibility.

Q: Does this include the output shaft or just the gear housing? A: This is the complete gear head assembly, including the internal gears and bearings, ready for direct installation onto your trimmer.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.