1. Introdución
This manual provides essential information for the safe and effective operation, maintenance, and troubleshooting of your ECHO GC351 chainsaw. Please read and understand all instructions before operating the machine. Proper use and maintenance will ensure optimal performance and extend the lifespan of your chainsaw.
2. Información de seguridade
Operating a chainsaw can be hazardous. Always prioritize safety to prevent serious injury or death. Adhere to all local regulations and safety guidelines.
2.1 Equipos de protección individual (EPI)
- Protección da cabeza: Use un casco de seguridade.
- Protección ocular: Use lentes de seguridade ou unha pantalla facial.
- Protección auditiva: Wear earplugs or earmuffs.
- Protección das mans: Use luvas de traballo pesados.
- Protección das pernas: Use chainsaw protective trousers or chaps.
- Protección dos pés: Use botas de seguridade con punta de aceiro e boa adherencia.
2.2 Seguridade da zona de traballo
- Asegúrate de que a zona de traballo estea libre de transeúntes, nenos e animais domésticos.
- Maintain stable footing and balance at all times.
- Clear away obstacles that could cause you to trip or lose balance.
- Do not operate the chainsaw in wet conditions or in areas with poor visibility.
2.3 Seguridade do combustible
- Handle fuel in a well-ventilated area, away from sparks or open flames.
- Do not smoke while fueling the chainsaw.
- Limpe inmediatamente o combustible derramado.
- Gardar o combustible en recipientes homologados.
2.4 Seguridade no funcionamento
- Suxeita sempre a motoserra firmemente con ambas as mans, cos polgares e os dedos rodeando as asas.
- Teña en conta contragolpe, which can occur when the moving chain at the tip of the guide bar contacts an object.
- Never operate the chainsaw when fatigued, ill, or under the influence of alcohol or drugs.
- Non chegue nin corte por encima da altura dos ombreiros.
3. Compoñentes e controis
Familiarize yourself with the various parts of your ECHO GC351 chainsaw before operation.

Imaxe 3.1: The ECHO GC351 chainsaw in operation, demonstrating its use for cutting logs. The image shows the guide bar and chain engaged with a wooden log, with sawdust visible on the ground. A gloved hand is holding the rear handle, indicating proper two-hand operation.
- Barra de guía: Apoia e guía a cadea da serra.
- Cadena de serra: O compoñente de corte da motoserra.
- Front Hand Guard: Protects the operator's left hand and activates the chain brake.
- Asa dianteira: For the operator's left hand.
- Agarre inicial: Úsase para arrancar o motor.
- Palanca de estrangulación: Úsase para o arranque en frío do motor.
- Mango traseiro: For the operator's right hand, contains throttle controls.
- Gatillo do acelerador: Controla a velocidade do motor.
- Throttle Trigger Lockout: Evita o accionamento accidental do acelerador.
- Freo de cadea: Safety device to stop the chain quickly.
- Silenciador: Reduce o ruído do motor e dirixe os gases de escape.
- Tapón do depósito de combustible: Covers the fuel tank opening.
- Tapa do depósito de aceite: Covers the chain oil tank opening.
- Engine Stop Switch: Turns the engine off.
4. Configuración
4.1 Montaxe da barra guía e da cadea de serra
- Ensure the engine is off and the spark plug cap is disconnected.
- Remove the chain cover nuts and chain cover.
- Place the saw chain around the clutch drum and guide bar. Ensure the cutting edges face forward on the top of the guide bar.
- Mount the guide bar onto the studs, aligning the chain tensioner pin with the hole in the guide bar.
- Replace the chain cover and loosely tighten the nuts.
- Adjust chain tension using the tensioning screw. The chain should be snug against the guide bar but still able to be pulled freely by hand.
- Aperte ben as porcas da tapa da cadea.
4.2 Abastecemento
The ECHO GC351 uses a 2-stroke engine. It requires a specific mixture of gasoline and 2-stroke engine oil.
- Mestura de combustible: Use unleaded gasoline mixed with high-quality 2-stroke engine oil at a ratio specified by the manufacturer (typically 50:1 or 25:1, refer to your engine oil's instructions).
- Depósito de combustible: Carefully fill the fuel tank, avoiding overfilling. Securely close the fuel tank cap.
- Chain Oil Tank: Fill the chain oil tank with appropriate chain lubricant. This oil is crucial for lubricating the guide bar and chain during operation. Securely close the oil tank cap.
5. Instrucións de funcionamento
5.1 Arranque do motor
Cold Start (First start of the day or after a long period of inactivity):
- Coloque a motoserra sobre unha superficie firme e plana.
- Implicar o freo de cadea by pushing the front hand guard forward.
- Establece o engine stop switch á posición ON.
- Tira o palanca de estrangulamento to the FULL CHOKE position.
- If equipped, press the bulbo de imprimación several times until fuel is visible.
- Hold the front handle firmly with one hand and pull the starter grip briskly until the engine fires (usually a few pulls).
- Once the engine fires, immediately push the palanca de estrangulamento to the HALF CHOKE or RUN position.
- Tira o starter grip again until the engine starts and runs smoothly.
- Briefly blip the gatillo do acelerador to disengage the half-choke.
- Desenganche o freo de cadea by pulling the front hand guard back towards the front handle. The chain should now be free to move.
Warm Start (Engine is already warm from recent use):
- Coloque a motoserra sobre unha superficie firme e plana.
- Implicar o freo de cadea.
- Establece o engine stop switch á posición ON.
- Asegurar o palanca de estrangulamento is in the RUN position.
- Hold the front handle firmly and pull the starter grip briskly until the engine starts.
- Desenganche o freo de cadea.
5.2 Técnicas de corte
- Always maintain a firm, balanced stance.
- Keep both hands on the chainsaw handles at all times during operation.
- Evite cortar coa punta da barra guía para minimizar o risco de contragolpes.
- When cutting, allow the chain to do the work. Do not force the saw.
- Be aware of falling branches or logs and plan your escape route.
5.3 Parar o motor
- Soltar o gatillo do acelerador to allow the engine to return to idle.
- Implicar o freo de cadea.
- Move o engine stop switch á posición OFF.
6. Mantemento
Regular maintenance is crucial for the safe and efficient operation of your chainsaw. Always ensure the engine is off and the spark plug cap is disconnected before performing any maintenance.
6.1 Daily / Before Each Use
- Comproba chain tension: Adjust if too loose or too tight.
- Comproba chain sharpness: Sharpen if dull or damaged.
- Verifica chain oil level: Refill as needed.
- Inspeccionar nivel de combustible: Refill with proper fuel mixture.
- Comproba filtro de aire for excessive dirt.
- Proba freo de cadea funcionalidade.
6.2 Despois de cada uso
- Limpar o filtro de aire.
- Limpar o guide bar groove and oil holes.
- Remove sawdust and debris from the cadea and sprocket area.
- Limpo engine cooling fins para evitar o sobrequecemento.
6.3 Mantemento periódico
- Afiado da cadea: Sharpen the saw chain regularly using a round file of the correct diameter. Refer to the chain manufacturer's instructions.
- Buxía: Inspect and clean the spark plug. Replace if electrodes are worn or fouled.
- Filtro de combustible: Inspect and replace the fuel filter as needed.
- Silenciador: Clean carbon deposits from the muffler and exhaust port.
7 Solución de problemas
This section addresses common issues you might encounter with your ECHO GC351 chainsaw.
| Problema | Causa posible | Solución |
|---|---|---|
| O motor non arranca | No fuel, incorrect choke setting, fouled spark plug, chain brake engaged | Check fuel level and mixture, adjust choke, clean/replace spark plug, disengage chain brake |
| O motor arranca pero cala | Incorrect choke setting, dirty air filter, stale fuel | Adjust choke, clean air filter, replace fuel with fresh mixture |
| A cadea non corta de xeito eficiente | Cadea desafilada, tensión incorrecta da cadea, cadea instalada ao revés | Sharpen chain, adjust tension, check chain direction |
| Exceso de fume do escape | Incorrect fuel/oil mixture, dirty air filter | Verify fuel mixture ratio, clean air filter |
8. Especificacións
Technical specifications for the ECHO GC351 Chainsaw.
| Característica | Especificación |
|---|---|
| Marca | ECO |
| Modelo | GC351 |
| Cilindrada do motor | 34.0 cc |
| Fonte de enerxía | Funciona a gas |
| Lonxitude da barra guía | 35 cm |
| Peso do produto | 4 kg |
| Dimensións do paquete | 85 x 29 x 29 cm |
| Fabricante | Yamabiko Corporation |
| ASIN | B07CG74NP7 |
| Primeira data dispoñible | 2018/04/18 |
9. Garantía e soporte
For warranty information, technical support, or service inquiries regarding your ECHO GC351 chainsaw, please contact the retailer where the product was purchased or refer to the official ECHO website for authorized service centers and contact details. Keep your proof of purchase for warranty claims.





