Oregon Magnum Gatorline 155 Trimmer Line Heavy Duty, Professional Square Weed Wacker String for Gas and Electric Grass Trimmer and Brushcutters, Fits Most Standard Models .155" x 246-Foot (22-855)

What It Is

The Oregon Magnum Gatorline 155 is a heavy-duty, professional-grade trimmer line (.155-inch diameter) designed for gas and electric string trimmers and brushcutters. It’s built for clearing thick weeds, brush, and overgrown grass, not light residential trimming.

Fitment & Compatibility

• Line diameter: .155-inch (3.9mm). Check your trimmer’s manual for max line size—most standard gas trimmers accept .155, but some electric models may require smaller (e.g., .080–.120). Using too thick a line can damage the head or motor.
• Trimmer head type: Works with bump-feed, pre-wound spools, and manual-feed heads. Not ideal for fixed-line or quick-load heads unless you cut your own lengths.
• Brand/model fit: Fits most standard gas and electric trimmers (e.g., Echo, Stihl, Husqvarna, Ryobi, EGO, Greenworks) that accept .155 line. Not for micro-trimmers or low-voltage electric units with small heads.
• OEM vs aftermarket: This is a universal aftermarket line, not OEM-specific. No adapter or special spool needed—just load it into your existing head.
• Measurement: 246 feet per spool. Verify your head’s line capacity (typically 20–50 feet per side) to avoid waste.

Key Things to Know

• Durability: Square-edged design cuts through thick brush and woody weeds better than round line, but it can chip on concrete or rocks—expect shorter life if you hit hard surfaces.
• Installation: Moderate difficulty. The line is stiff, so pre-soaking in warm water for 10 minutes softens it for loading. Follow your trimmer’s manual for winding direction (clockwise vs counterclockwise).
• Common gotchas: .155 draws more power—on electric trimmers with weak motors (under 4A), it may bog down or overload. Gas trimmers with 25cc+ engines handle it best. Also, the line can fuse if stored in direct heat (e.g., garage in summer)—keep it cool.
• Noise/spool life: The square shape creates a slight “whirring” sound at high RPM—normal. One spool lasts 3–5 heavy-use sessions for a typical yard.

Should You Buy It

Yes, if you have a gas trimmer (25cc+) or a high-torque electric model (56V+ or 40V+ brushless) and regularly tackle thick weeds, brambles, or brush. Skip it for light grass trimming or if your trimmer’s manual specifies a max line diameter under .130—you’ll strain the motor and risk head damage.