1. Introduzione
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. Istruzioni di sicurezza
Always follow basic safety precautions to reduce the risk of fire, electric shock, and personal injury when operating electric garden tools.
- Leggi tutte le istruzioni: Familiarizzare con i comandi e con l'uso corretto dello strumento.
- Indossare un abbigliamento appropriato: Always wear safety glasses or goggles, long pants, sturdy footwear, and hearing protection.
- Tenere lontani i bambini e gli astanti: Do not allow children or untrained persons to operate this unit. Maintain a safe distance from the work area.
- Ispezionare l'area di lavoro: Before starting, clear the area of objects that could be thrown by the cutting line, such as rocks, broken glass, or wire.
- Evitare ambienti pericolosi: Do not use the tool in wet conditions or in the presence of flammable liquids or gases.
- Scollegare quando non in uso: Always disconnect the power supply before cleaning, servicing, or when leaving the tool unattended.
- Utilizzare la fonte di alimentazione corretta: Ensure the power supply matches the specifications listed on the tool.
3. Contenuto della confezione
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
- Maniglia ausiliaria
- Protezione di sicurezza
- Manuale del proprietario
If any parts are missing or damaged, do not operate the tool. Contact Greenworks Tools customer service for assistance.
4. Assemblaggio e configurazione
The Greenworks Tools 21277 requires minor assembly before first use. Follow these steps:
- Fissare la protezione di sicurezza: 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.
- Installare la maniglia ausiliaria: Far scorrere l'impugnatura ausiliaria sull'albero principale. Regolarne la posizione per un utilizzo confortevole e serrare il meccanismo di bloccaggio.
- Regolare la lunghezza dell'albero: 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. Istruzioni per l'uso
Your Greenworks Tools 21277 is designed for both grass trimming and edging. Always ensure the tool is unplugged before making any adjustments.
5.1. Avvio e arresto
- Iniziare: Connect the power cord to a suitable outlet. Press and hold the safety lock-off button, then squeeze the trigger switch.
- Fermare: Rilasciare l'interruttore del grilletto.
5.2. Grass Trimming
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. Funzione di bordatura
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. Manutenzione
Regular maintenance ensures the longevity and safe operation of your trimmer.
- Pulizia: 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.
- Sostituzione della linea: 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.
- Magazzinaggio: Store the trimmer in a dry, secure place, out of reach of children. Protect it from direct sunlight and extreme temperatures.
7. Risoluzione Dei Problemi
If you encounter issues with your Greenworks Tools 21277, refer to the following common problems and solutions:
| Problema | Possibile causa | Soluzione |
|---|---|---|
| Il rifinitore non si avvia | Nessuna alimentazione Blocco di sicurezza non attivato | Controllare il cavo di alimentazione e la presa Ensure safety lock-off button is pressed before trigger |
| La linea di taglio non avanza | Linea aggrovigliata o vuota Debris in spool head | Replace or untangle line Clean spool head (unplug first) |
| Prestazioni di taglio ridotte | Worn cutting line Surriscaldamento del motore | Sostituire la linea di taglio Lasciare raffreddare il motore |
If the problem persists after attempting these solutions, please contact Greenworks Tools customer service.
8. Specifiche
Technical details for the Greenworks Tools 21277 Electric Grass Trimmer and Edger:
- Numero modello: 21277
- Fonte di energia: Elettrico
- Potenza del motore: 500 L
- Larghezza di taglio: 25 cm / 30 cm (regolabile)
- Diametro della linea: 1.5 mm (double line)
- Velocità: 8000 giri al minuto
- Peso: 2.4 kg
- Funzioni: Grass Trimmer, Edger (180-degree pivoting head)
9. Garanzia e supporto
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 websito.
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.