1. Introducció
Thank you for choosing the Greenworks Tools 21277 Electric Grass Trimmer and Edger. This powerful 500W tool is designed for efficient grass trimming and lawn edging, offering a 2-in-1 function for versatile garden maintenance. Please read this manual carefully before operation to ensure safe and optimal performance.

Figure 1: Greenworks Tools 21277 Electric Grass Trimmer and Edger. This image shows the complete assembled unit, highlighting its ergonomic design and cutting head.
2. Instruccions de seguretat
Always follow basic safety precautions to reduce the risk of fire, electric shock, and personal injury when operating electric garden tools.
- Llegeix totes les instruccions: Familiaritzeu-vos amb els controls i l'ús correcte de l'eina.
- Porteu roba adequada: Always wear safety glasses or goggles, long pants, sturdy footwear, and hearing protection.
- Mantingueu allunyats els nens i els vianants: Do not allow children or untrained persons to operate this unit. Maintain a safe distance from the work area.
- Inspeccioneu la zona de treball: Before starting, clear the area of objects that could be thrown by the cutting line, such as rocks, broken glass, or wire.
- Eviteu entorns perillosos: Do not use the tool in wet conditions or in the presence of flammable liquids or gases.
- Desconnecteu quan no estigui en ús: Always disconnect the power supply before cleaning, servicing, or when leaving the tool unattended.
- Utilitzeu la font d'alimentació correcta: Ensure the power supply matches the specifications listed on the tool.
3. Contingut del paquet
Carefully unpack your Greenworks Tools 21277 and check for any damage. Ensure all items are present:
- Greenworks Tools 21277 Electric Grass Trimmer and Edger unit
- Mànec auxiliar
- Guàrdia de seguretat
- Manual del propietari
If any parts are missing or damaged, do not operate the tool. Contact Greenworks Tools customer service for assistance.
4. Muntatge i muntatge
The Greenworks Tools 21277 requires minor assembly before first use. Follow these steps:
- Connecteu la protecció de seguretat: Align the safety guard with the mounting points on the trimmer head. Secure it firmly with the provided screws. Ensure it is properly seated to protect against debris.
- Instal·leu la nansa auxiliar: Feu lliscar la maneta auxiliar sobre l'eix principal. Ajusteu-ne la posició per a un funcionament còmode i estrenyeu el mecanisme de bloqueig.
- Ajustar la longitud de l'eix: The trimmer features an adjustable shaft. Extend or retract the shaft to a comfortable working height, then secure it.

Figure 2: Illustration showing the attachment of the safety guard to the trimmer head.
5. Instruccions de funcionament
Your Greenworks Tools 21277 is designed for both grass trimming and edging. Always ensure the tool is unplugged before making any adjustments.
5.1. Arrancada i aturada
- Començar: Connect the power cord to a suitable outlet. Press and hold the safety lock-off button, then squeeze the trigger switch.
- Parar: Deixeu anar l'interruptor del disparador.
5.2. Retallada de gespa
Hold the trimmer firmly with both hands. Swing the trimmer from side to side, keeping the cutting line parallel to the ground. The 25 cm and 30 cm cutting widths allow for efficient coverage.
5.3. Funció de vores
The 21277 features a 180-degree rotating cutting head for easy conversion to an edger.
- Rotate the Head: Disconnect power. Locate the head rotation mechanism and pivot the cutting head 180 degrees until it locks into the edging position.
- Edge the Lawn: Reconnect power. Guide the edger along the edge of your lawn, using the guide wheel (if present) for stability.

Figure 3: The trimmer head rotated 180 degrees for edging functionality.
5.4. Line Feeding
This model uses a robust double line with 1.5 mm thickness. The line typically feeds automatically when the trimmer is running and tapped lightly on the ground, or via an automatic feed system. Refer to the specific mechanism for your unit.
6. Manteniment
Regular maintenance ensures the longevity and safe operation of your trimmer.
- Neteja: Always disconnect the power before cleaning. Use a damp cloth to wipe down the exterior. Do not use harsh chemicals or abrasive cleaners. Keep air vents clear of debris.
- Substitució de línia: When the cutting line runs out, replace it with genuine Greenworks 1.5 mm double line. Follow the instructions provided with the replacement spool for proper installation.
- Emmagatzematge: Store the trimmer in a dry, secure place, out of reach of children. Protect it from direct sunlight and extreme temperatures.
7. Solució De Problemes
If you encounter issues with your Greenworks Tools 21277, refer to the following common problems and solutions:
| Problema | Causa possible | Solució |
|---|---|---|
| El tallador no s'engega | Sense font d'alimentació Safety lock-off not engaged | Comproveu el cable d'alimentació i la presa de corrent Ensure safety lock-off button is pressed before trigger |
| El fil de tall no alimenta | Línia enredada o buida Debris in spool head | Substituir o desenredar la línia Clean spool head (unplug first) |
| Rendiment de tall reduït | Worn cutting line Sobreescalfament del motor | Substituïu la línia de tall Deixeu que el motor es refredi |
If the problem persists after attempting these solutions, please contact Greenworks Tools customer service.
8. Especificacions
Technical details for the Greenworks Tools 21277 Electric Grass Trimmer and Edger:
- Número de model: 21277
- Font d'alimentació: Elèctric
- Potència del motor: 500 W
- Amplada de tall: 25 cm / 30 cm (adjustable)
- Diàmetre de la línia: 1.5 mm (double line)
- Velocitat: 8000 RPM
- Pes: 2.4 kg
- Funcions: Grass Trimmer, Edger (180-degree pivoting head)
9. Garantia i Suport
Greenworks Tools products are manufactured to high-quality standards and are guaranteed against manufacturing defects. For specific warranty terms and conditions, please refer to the warranty card included with your product or visit the official Greenworks Tools weblloc.
For technical support, spare parts, or service inquiries, please contact Greenworks Tools customer service through their official channels. Have your model number (21277) and purchase information ready when contacting support.