ERGIT Prewound Replacement Spool with Spring for Stihl AutoCut 25-2 Trimmer Head FS55 FS55R FS56 FS56RC FS70 FS70R FS80 FS90 FS90R FS100 FS120 Weed Eater String

What It Is

This is a prewound replacement spool (with spring) for the Stihl AutoCut 25-2 trimmer head. It’s designed for homeowners and light commercial users who want a drop-in reload without manually winding string onto the spool.

Fitment & Compatibility

Exact fit for Stihl models using the AutoCut 25-2 head: FS55, FS55R, FS56, FS56RC, FS70, FS70R, FS80, FS90, FS90R, FS100, FS120. Also fits some older FS series trimmers that came with the 25-2 head.
What to check before buying:

• Verify your trimmer head is AutoCut 25-2 – look for the model number printed on the head.
• This spool uses 2.4mm (0.095″) diameter line – do not use thicker line or it may jam.
• The spool includes a spring; if your head uses a separate spring retainer, confirm yours matches the included one.
• ERGIT is an aftermarket brand – not OEM Stihl, but dimensions match the 25-2 head exactly.

Key Things to Know

• Installation: Simply remove the old spool and spring, drop in the new prewound spool, and snap the cover back on. Takes about 30 seconds.
• Line quality: The included string is standard round line – fine for grass and light weeds, but not as durable as Stihl’s OEM twisted or serrated line for heavy brush.
• Spring included: Some aftermarket spools omit the spring – this one includes it, saving you from buying separately.
• Common gotcha: The prewound line can sometimes be slightly uneven on the spool. If the trimmer head wobbles or feeds poorly, unwind and rewind the line tightly by hand.

Should You Buy It

If you own a Stihl with an AutoCut 25-2 head and want a quick, no-hassle reload without measuring or winding line, this spool is a solid value. It’s best for routine grass trimming – skip it if you need heavy-duty line for thick brush or prefer OEM parts for warranty peace of mind.