1. Introduction and Product Overview
This manual provides essential information for the proper use and maintenance of your Flymo Genuine Multi Trim 250D 250DX Strimmer Spool & Line Double Autofeed. This product is a genuine replacement part designed to ensure optimal performance of your Flymo grass trimmer.
The spool and line are engineered for a double autofeed system, providing continuous and reliable line extension during operation. This pack includes two (2) spools, ensuring you have a spare readily available.
Compatible Flymo Models: Contour, Mini Trim, Multi-Trim, Twist 'n' Edge, Revolution.

Figure 1: Two Flymo FLY021 Strimmer Spools & Line (Double Autofeed) in original packaging. Each package clearly displays the 'FLY021' model number and 'Genuine Parts' branding, indicating authenticity and compatibility with various Flymo strimmer models.
2. Setup and Installation
Replacing the strimmer spool is a straightforward process. Always ensure your strimmer is disconnected from its power source (unplugged or battery removed) before attempting any installation or maintenance.
- Disconnect Power: Ensure the strimmer is completely powered off and disconnected from the mains electricity or has its battery removed to prevent accidental startup.
- Remove Strimmer Head Cover: Locate the strimmer head and carefully remove the cover that secures the spool. This usually involves pressing release tabs or unscrewing a cap.
- Remove Old Spool: Take out the old, empty, or damaged spool from the strimmer head. Dispose of it responsibly.
- Install New Spool: Place the new Flymo FLY021 spool into the strimmer head. Ensure the line is correctly threaded through any designated eyelets or guides on the strimmer head. The spool is designed for double autofeed, so ensure both lines are free.
- Secure Cover: Reattach the strimmer head cover, ensuring it clicks securely into place or is tightened properly.
- Check Line Feed: Gently pull on the line ends to ensure they feed smoothly from the spool.

Figure 2: A single Flymo strimmer spool, removed from its packaging. Note the 'REWIND LINE' arrows indicating the correct direction for winding the line if manual rewinding is ever required. The spool measures 65mm x 23mm.
3. Operating Instructions (Spool Functionality)
The Flymo FLY021 spool is designed for use with Flymo strimmers featuring a double autofeed system. This system automatically extends the cutting line as it wears down, eliminating the need for manual line feeding during operation.
- Automatic Line Feed: During normal operation, the strimmer's motor and head design will automatically feed out new line as the existing line shortens due to contact with grass or obstacles. This ensures a consistent cutting diameter.
- Optimizing Performance: For best results, operate your strimmer at the recommended speed and avoid prolonged contact with hard surfaces, which can prematurely wear the line.
- Line Replacement: When the spool is empty, or the line becomes severely damaged, replace it with another genuine Flymo FLY021 spool as per the "Setup and Installation" section.
4. Maintenance
Proper maintenance of your strimmer and its components ensures longevity and efficient operation.
- Spool Storage: Store unused spools in a cool, dry place away from direct sunlight. Extreme temperatures can affect the integrity of the nylon line.
- Clean Strimmer Head: Regularly clean the strimmer head area, removing any accumulated grass clippings, dirt, or debris. This prevents obstructions that could hinder the autofeed mechanism.
- Inspect Line: Periodically inspect the cutting line for excessive wear, fraying, or damage. Replace the spool if the line appears compromised, even if it's not fully used.
5. Troubleshooting
If you encounter issues with your strimmer's line feed, consider the following:
- Line Not Feeding:
- Ensure the spool is correctly seated and the cover is securely fastened.
- Check for tangled line on the spool or debris obstructing the line exit holes.
- If the line is stuck, manually pull out a small length of line from each side.
- Line Breaking Frequently:
- Verify you are using a genuine Flymo spool and line, as non-genuine parts may not meet quality standards.
- Avoid hitting hard objects like fences, rocks, or concrete, which can cause rapid line wear and breakage.
- Ensure the strimmer head is clean and free of debris that could pinch or damage the line.
6. Specifications
| Feature | Detail |
|---|---|
| Product Name | Flymo Genuine Multi Trim 250D 250DX Strimmer Spool & Line Double Autofeed |
| Model Number | FLY021 (Manufacturer Reference: 32-FY-021_x_2) |
| Brand | Flymo |
| Spool Dimensions | 65mm (diameter) x 23mm (height) |
| Product Dimensions (Pack) | 6.5 x 2.3 x 0.5 cm (individual spool); 147 g (total pack weight) |
| Line Type | Double Autofeed Nylon Line |
| Assembly Required | Yes (installation into strimmer) |
| Compatible Models | Flymo Contour, Mini Trim, Multi-Trim, Twist 'n' Edge, Revolution |
7. Warranty and Support
For specific warranty information regarding your Flymo Genuine Multi Trim Strimmer Spool & Line, please refer to the documentation provided with your original Flymo strimmer or visit the official Flymo website. As a genuine replacement part, this product is designed to meet Flymo's quality standards.
For further assistance or to explore other genuine Flymo products, please visit the official Flymo store:





