Adefol String Trimmer Replacement Parts Head Spool and Cover Cap 6pcs Kit for STIHL FS80 FS83 FS85 FS100 FS110 FS120 FS130 FS200 with Spring, Line Feed Eyelet Accessories

What It Is

This is a 6-piece replacement kit for STIHL curved-shaft string trimmers, including a spool, cover cap, spring, and line feed eyelets. It’s designed for bump-feed heads on mid-to-heavy-duty STIHL models.

Fitment & Compatibility

Check your model number before buying. This kit fits STIHL FS80, FS83, FS85, FS100, FS110, FS120, FS130, and FS200 trimmers. It replaces OEM part numbers 4139 007 1025 (spool) and 4139 007 1032 (cover). It will not fit straight-shaft models (like FS90R, FS130R) or any other brand. Measure your existing spool diameter—this one is roughly 3.5 inches wide and uses 0.095”–0.105” trimmer line. Verify your line feed eyelets match the two holes in the cover; some older heads use a different pattern.

Key Things to Know

• Quality varies – Several reviews report the plastic cover cracks within a season, especially in hot sun or when hitting rocks. The spring and eyelets are generally fine.
• Installation is simple – No tools needed. Remove the old head, swap the spring, place the spool, and snap the cover on. Watch the line winding direction (usually clockwise on STIHL).
• Line capacity is lower – This spool holds about 15–20 feet of line vs. 25–30 on genuine STIHL spools. You’ll reload more often.
• Not a full head replacement – This is just the spool, cover, and spring. You keep your existing trimmer head base and nut. If your head base is worn, buy a complete head kit instead.

Should You Buy It

Buy this if you need a cheap backup spool for light trimming on a compatible STIHL trimmer and don’t mind replacing the plastic cover every year or two. Skip it if you trim heavy brush, want longer run time between reloads, or need a part that lasts multiple seasons—the genuine STIHL head costs about $25 but holds more line and is much tougher.