FSA 400 K
The most powerful clearing saw in the AP Battery System, the short-shaft FSA 400 K is built for heavy-duty applications with compatibility for brush knives and circular saw blades.
The FSA 400 K is purpose-built for clearing thick vegetation and small-diameter trees. As the most powerful clearing saw in the AP Battery System—with performance comparable to the gas-powered FS 361 C-EM—it’s designed to take on demanding jobs in forestry, municipal, and landscape applications. Compatible with STIHL brush knives and circular saw blades, this short-shaft unit excels in dense, tough growth where precision and power matter. And with comfort-focused features like an ergonomic control handle and anti-vibration system, it delivers pro-level performance without compromising user experience.
Features:
• Most Powerful Battery-Powered Clearing Saw in the STIHL Lineup - With power comparable to the gas-powered FS 361 C-EM trimmer, the FSA 400/400 K is the most powerful battery clearing saw in the STIHL lineup and offers users the professional performance they need to take on tough jobs.
• Built for Brush and Blade Cutting - Compatible with professional-grade brush knives and circular saw blades for forestry and land-clearing work.
• Shaft Length - The FSA 400 K features a short shaft and compatibility with a range of heads and blades making it ideal for forestry work and clearing tougher growth.
• Anti-Vibration System - The trimmer features handlebar support with anti-vibration system to help reduce operator fatigue.
• Ergonomic Control Handle - This trimmer offers convenience and maneuverability with all controls located on the ergonomic control handle.
• High-Tech Polymer Housing - Housings are lightweight, withstand greater impact, and are corrosion-resistant.
• Start/Run/Stop Controls on Handle - Convenient start/run/stop controls are built into the handle for easy operation.
• STIHL Electric Motor - Lightweight and compact, STIHL electric motors require minimal maintenance and feature low noise levels and reduced vibration.
• Hanging Loop - Hang your cordless trimmer securely on a wall to save space using the loop in the handle housing
• Retaining Latch - All STIHL battery-powered products feature a retaining latch that is designed to prevent the unit from unintentional starts when the battery is inserted.
• Rubberized Soft-Touch Handle - Soft rubber texture is both easy to grip and makes the product comfortable to hold for extended periods.
• IPX4 Rating - This tool is IPX4-rated for weather-resistant construction and has been designed and tested for splash-water protection.
• Built for Brush and Blade Cutting - Compatible with professional-grade brush knives and circular saw blades for forestry and land-clearing work.
• Shaft Length - The FSA 400 K features a short shaft and compatibility with a range of heads and blades making it ideal for forestry work and clearing tougher growth.
• Anti-Vibration System - The trimmer features handlebar support with anti-vibration system to help reduce operator fatigue.
• Ergonomic Control Handle - This trimmer offers convenience and maneuverability with all controls located on the ergonomic control handle.
• High-Tech Polymer Housing - Housings are lightweight, withstand greater impact, and are corrosion-resistant.
• Start/Run/Stop Controls on Handle - Convenient start/run/stop controls are built into the handle for easy operation.
• STIHL Electric Motor - Lightweight and compact, STIHL electric motors require minimal maintenance and feature low noise levels and reduced vibration.
• Hanging Loop - Hang your cordless trimmer securely on a wall to save space using the loop in the handle housing
• Retaining Latch - All STIHL battery-powered products feature a retaining latch that is designed to prevent the unit from unintentional starts when the battery is inserted.
• Rubberized Soft-Touch Handle - Soft rubber texture is both easy to grip and makes the product comfortable to hold for extended periods.
• IPX4 Rating - This tool is IPX4-rated for weather-resistant construction and has been designed and tested for splash-water protection.

