Stihl 4008 710 4302 Replacement String Heads For FSA 56

What It Is

This is the OEM replacement string head (part number 4008 710 4302) for the Stihl FSA 56 battery-powered string trimmer. It holds and feeds the cutting line, allowing you to edge and trim grass and weeds.

Fitment & Compatibility

• Exact fit: Designed specifically for the Stihl FSA 56. Not compatible with other Stihl models (e.g., FSA 45, FSA 65, or gas trimmers) without adapter kits.
• OEM vs aftermarket: This is genuine Stihl—guaranteed to match the original head’s mounting thread (M10 x 1.25 LH) and bump-feed mechanism. Aftermarket heads may require different line sizes or have looser tolerances.
• Line size: Accepts 0.080" or 0.095" diameter line. Using thicker line (0.105") can overload the motor and reduce runtime.
• What to check before buying: Confirm your trimmer model is FSA 56 (look on the housing label). If you have an FSA 56 R or FSA 56 K, this head also fits—same mounting thread.

Key Things to Know

• Quality: OEM Stihl parts are durable and reliable. The bump-feed mechanism is less prone to jamming than many aftermarket heads.
• Installation difficulty: Easy. No tools required—hand-tighten onto the threaded shaft (left-hand thread, so turn clockwise to loosen, counterclockwise to tighten).
• Common gotcha: The head comes pre-wound with line, but the line can be brittle on first use. Replace with fresh Stihl line for best performance.
• Line loading: You must remove the head to reload line. Practice the “fold and insert” method to avoid wasting line.

Should You Buy It

If you own a Stihl FSA 56 and need a direct, hassle-free replacement, this is the right choice. It’s slightly pricier than generic heads, but the perfect fit and reliable feed make it worth it for anyone who values time over saving a few dollars.