Description
Overview:
The Compression Spring for Stihl AutoCut C 6-2 Mowing Head is a genuine Stihl replacement designed to restore smooth line feed and reliable bump action in compatible trimmer heads. Made from durable steel, it provides the correct tension for the spool and cap assembly so the mowing head resets properly after each tap. This spring is purpose-built for the AutoCut C 6-2 head used on Stihl grass trimmers and brushcutters, helping maintain consistent performance during edging, trimming, and light brush work. It is a direct replacement for OEM No. 4006 997 3100, ensuring fit and function match the original part. A straightforward swap during routine maintenance, it keeps your head mechanism working as intended and reduces downtime caused by weak or fatigued springs.
Key Features:
- Genuine Stihl part for assured compatibility and performance (OEM No. 4006 997 3100)
- Steel construction for strength, resilience, and long service life
- Correct spring rate for reliable bump feed and spool return on AutoCut C 6-2 heads
- Precisely formed coils for consistent tension and smooth operation
- Direct-fit replacement with no modifications required
- Helps prevent poor line advance caused by tired or distorted springs
- Simple to install during routine head servicing
- Supports optimal cutting performance and reduces unplanned downtime
Typical Applications:
Used in Stihl AutoCut C 6-2 mowing heads fitted to line trimmers and brushcutters for lawn, garden, and grounds maintenance. Ideal for replacing worn, bent, or lost springs during servicing, and for restoring reliable line feed in domestic gardens, commercial landscaping, and local authority maintenance work.
Also known as:
Mowing head compression spring, trimmer head spring, spool return spring, bump-feed spring, brushcutter head spring.
Fits Models:
AutoCut C 6-2
Alternate Part Numbers:
4006-997-3100, 40069973100
Product Specifications
| L&S Part No. | 4006 997 3100 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 40069973100 |
| Unit of Sale | 1 |
| Machine Type | Grass Trimmers |
| Fits Brands | Stihl |
| Key Features | - Genuine Stihl part, OEM No. 4006 997 3100 - Steel construction ensures strength and durability - Correct spring rate for AutoCut C 6-2 heads - Direct-fit replacement, no modifications needed - Prevents poor line advance from weak springs |

