6PCS Trimmer Head Spools for Stihl FSA 57 FSE 52 Weed Eater String Autocut C3-2 Trimmer Head Replace Parts 4009 710 4305

What It Is

This is a 6-pack of replacement trimmer line spools designed for the Stihl Autocut C3-2 trimmer head. They are intended for battery-powered Stihl models like the FSA 57 and FSE 52, as well as other weed eaters using the same head system.

Fitment & Compatibility

Before buying, confirm your trimmer uses the Stihl Autocut C3-2 head (check the head itself for “C3-2” markings). These spools are aftermarket replacements for OEM part 4009 710 4305. They fit Stihl FSA 57, FSE 52, and other models with that head, but will not fit standard bump-feed or Speed-Feed heads. The spool diameter is approximately 3.5 inches, and line diameter is typically 0.080″–0.095″. Measure your existing spool width and line gauge to ensure a match.

Key Things to Know

• Quality concerns – With a 3.0/5 rating, expect thinner plastic and slightly looser line fit than OEM. Burrs on the spool edges may require light sanding before use.
• Installation – Easy: remove the head cap, replace the spool, rewind line following the directional arrows. No tools needed.
• Line loading – These spools come pre-wound, but the line may be less dense than OEM. You can re-spool with your preferred line if needed.
• Common gotcha – The spool may not snap securely into the C3-2 head; check that the retaining tabs align properly. If the head wobbles, the spool is likely too small.

Should You Buy It

Buy this if you have a Stihl battery trimmer with the Autocut C3-2 head and want a budget-friendly 6-pack for light-duty trimming. Skip it if you need high-durability line for thick weeds or heavy use—OEM spools or a different head system will last longer and perform better.