1. Introdução
Thank you for choosing the Stihl FS 89 Brushcutter. This manual provides essential information for the safe and efficient operation, maintenance, and care of your brushcutter. Please read this manual thoroughly before first use and keep it in a safe place for future reference. The Stihl FS 89 is a versatile and powerful tool designed for clearing tough grass and weeds, featuring a lightweight and compact design with a fuel-efficient 4-Mix engine.

Image: Stihl FS 89 Brushcutter, showcasing its design with the bike handle and cutting head.
2. Instruções de segurança
Your safety is paramount. Always follow these safety guidelines to prevent injury and damage to the equipment.
- Equipamento de Proteção Individual: Always wear appropriate personal protective equipment (PPE) including safety glasses, hearing protection, sturdy footwear, long trousers, and gloves. Wearing safety glasses is strongly recommended when using this tool.
- Área de trabalho: Ensure the work area is clear of bystanders, children, and pets. Remove any obstacles such as rocks, branches, or debris that could be thrown by the cutting head.
- Manuseio de combustível: Handle fuel with extreme care. Fuel is highly flammable. Always refuel in a well-ventilated area with the engine switched off and cool. Avoid spilling fuel.
- Inspeção: Before each use, inspect the brushcutter for any damaged parts, loose fasteners, or worn cutting attachments. Do not operate a damaged machine.
- Uso comercial: For commercial use, please observe all applicable safety regulations and guidelines.
- Operação: Hold the brushcutter firmly with both hands. Maintain a stable footing. Do not overreach.
3. Conteúdo da embalagem
Ao desembalar, verifique se todos os itens listados abaixo estão presentes e sem danos:
- 1 x Stihl FS 89 Brushcutter with two-handle grip
- 1 x Stihl TrimCut 31-2 Cutting Head
- 1 x Stihl Carrying Strap
- 1 x Pair of Stihl Safety Glasses
- 1 x Manual do Usuário (este documento)
4. Configuração
Follow these steps to prepare your Stihl FS 89 for operation:
- Montagem do Manípulo: Attach the two-handle grip (bike handle) to the shaft according to the instructions provided in the separate assembly guide or diagrams. Ensure it is securely fastened and positioned for comfortable operation.
- Cutting Head Installation: Mount the TrimCut 31-2 cutting head onto the gearbox shaft. Refer to the specific instructions for cutting head attachment to ensure it is correctly and safely installed.
- Mistura de combustível: The FS 89 features a Stihl 4-Mix engine. This engine requires a specific mixture of gasoline and Stihl 2-stroke engine oil. Always use Stihl's recommended mixing ratio (typically 50:1, but refer to the engine manual for exact specifications). Use fresh, high-quality unleaded gasoline.
- Abasteça o tanque de combustível: Carefully fill the fuel tank with the prepared fuel mixture. Do not overfill. Securely close the fuel cap.
- Adjust Carrying Strap: Attach and adjust the carrying strap to distribute the weight of the brushcutter comfortably across your shoulders, ensuring good balance and reducing fatigue during operation.
5. Instruções de operação
Before starting, ensure you have read and understood all safety instructions.
5.1 Ligando o motor
- Place the brushcutter on a firm, level surface.
- Set the master control lever to the cold start position (choke).
- Press the fuel pump (primer) several times until fuel is visible in the transparent bulb.
- Puxe a corda de arranque firmemente até que o motor dê uma breve partida.
- Immediately move the master control lever to the run position.
- Puxe a corda de arranque novamente até que o motor ligue e funcione suavemente.
- Allow the engine to warm up for a few moments before engaging the cutting head.
5.2 Operating the Brushcutter
- Hold the brushcutter firmly with both hands on the handle.
- Maintain a safe distance from the cutting head.
- Use um movimento de varredura para cortar a grama e as ervas daninhas.
- Avoid hitting hard objects with the cutting head.
- If the cutting head becomes entangled, release the throttle and switch off the engine before clearing the obstruction.
5.3 Parando o motor
To stop the engine, move the master control lever to the STOP position.
6. Manutenção
Regular maintenance ensures the longevity and optimal performance of your Stihl FS 89.
- Limpeza: After each use, clean the brushcutter, especially the cutting head and air intake, to remove grass, dirt, and debris.
- Filtro de ar: Regularly inspect and clean the air filter. Replace if damaged or excessively dirty.
- Vela de ignição: Check the spark plug periodically. Clean or replace if necessary. Ensure the correct gap.
- Cabeça de corte: Inspect the cutting head for wear and damage. Replace worn cutting lines or damaged blades.
- Filtro de combustível: Check and replace the fuel filter as recommended in the full service manual.
- Armazenar: When storing the brushcutter for extended periods, drain the fuel tank or use a fuel stabilizer. Clean the machine thoroughly and store it in a dry, secure location.
7. Solução De Problemas
This section addresses common issues you might encounter with your Stihl FS 89.
| Problema | Possível causa | Solução |
|---|---|---|
| O motor não liga | Sem combustível, afogador ajustado incorretamente, vela de ignição suja, filtro de combustível entupido. | Check fuel level, adjust choke, clean/replace spark plug, check/replace fuel filter |
| O motor funciona mal/não tem potência | Dirty air filter, incorrect fuel mixture, worn spark plug | Clean air filter, use correct fuel mixture, replace spark plug |
| Cutting head does not spin | Obstruction, damaged cutting head, clutch issue | Clear obstruction (engine off!), inspect/replace cutting head, consult service center for clutch issues |
If you encounter problems that cannot be resolved using this troubleshooting guide, please contact an authorized Stihl service dealer.
8. Especificações
Key technical specifications for the Stihl FS 89 Brushcutter:
- Deslocamento: 28.4 cm³
- Potência de saída: 0.95 kW / 1.3 cv
- Peso: 5.8 kg (12.8 libras)
- Comprimento total: 180 mm (7.1 polegadas)
- Capacidade do tanque de combustível: 0.71 L (24 fl oz)
- Cutting Tool: TrimCut 31-2
- Tipo de motor: Stihl 4-Mix Engine (Gas-powered)
- Cor: Laranja/Preto
9. Garantia e Suporte
Your Stihl FS 89 Brushcutter is covered by a manufacturer's warranty. For specific warranty terms and conditions, please refer to the warranty card included with your product or visit the official Stihl website. For technical support, spare parts, or service, please contact your authorized Stihl dealer. Spare parts information may not be available directly from general product listings; always consult an official Stihl service center for genuine parts.
Para obter mais assistência, visite o site oficial da Stihl. website ou entre em contato com o departamento de atendimento ao cliente.