Stihl DuroCut 40-4 Strimmer Head

STIHL DuroCut 40-4 Head

The STIHL DuroCut 40-4 Head is a robust dual-line mowing head built to tackle heavy vegetation and tough grass. It supports both 3.0 mm and 4.0 mm DuroCut line pieces and comes preloaded with twelve 4.0 mm segments. With its reinforced polyamide and carbon fibre blend, it offers strong performance in challenging conditions.

Line specs & capacity

The DuroCut 40-4 Head uses 4.0 mm line as standard, while also admitting 3.0 mm diameter options. Its spool holds approximately 2.6 m of line when loaded. This capacity supports sustained trimming operations in dense growth without frequent reloads.

Machine compatibility

This mowing head fits a selection of higher-powered STIHL models, including FS 361 C-EM, FS 411 C-EM, FS 461 C-EM / L, FS 491 C-EM, FS 561 C-EM, and the FSA 400. That makes it a solid choice for heavy-duty brushcutting and dense area maintenance.

User advantages & features

Because DuroCut 40-4 supports thicker line, it delivers better cut power through stubborn weeds and matted grass. Its reinforced construction helps resist breakage and wear. The dual-line layout widens your cut swath, while reduced vibration improves comfort during sustained use.

Care tip recommendation

For optimal performance, soak the cutting line in water for 12–24 hours prior to use. This increases flexibility, reduces brittleness, and helps prevent breakage under load—especially in thick or coarse vegetation.

Key Features

• Dual-line mowing head for dense vegetation and tough grass
• Supports both 3.0 mm and 4.0 mm DuroCut line
• Spool length: ~2.6 m of line
• Carbon fibre reinforced polyamide build for durability
• Comes with twelve 4.0 mm line pieces
• Fits FS 361 C-EM, FS 411 C-EM, FS 461 C-EM / L, FS 491 C-EM, FS 561 C-EM, FSA 400