🏷️ Basic Information Identification Make: Stihl Model: MS 290, MS 310, MS 390, MS 391 Category: Brushcutters 📋 Manual Details Manual Information Manual Type: Workshop Service Repair Manual Language: English Format: PDF Compatibility Operating Systems: All Versions of Windows & Mac Requirements Software Requirement: Adobe PDF Reader Delivery Delivery Method: Instant Download ⚙️ Engine Specifications Engine Type Engine Configuration: 2-stroke engine Engine Performance Power Output: Varies by model (e.g., MS 290: 3.1 kW, MS 310: 3.4 kW, MS 390: 3.9 kW, MS 391: 4.4 kW) Engine Displacement Displacement: Varies by model (e.g., MS 290: 50.1 cm³, MS 310: 50.1 cm³, MS 390: 64.1 cm³, MS 391: 64.1 cm³) Fuel System Fuel Type: Unleaded gasoline Fuel Mixture: Oil-fuel mixture (specific ratio detailed in manual) Ignition System Ignition Type: Electronic ignition 🔧 Maintenance Lubrication Chain Lubrication: Automatic chain lubrication system Maintenance Procedures Covered Procedures: Engine, clutch, ignition, fuel system, starter, chain brake, chain tensioner, AV handle system, master control/handle system servicing and repair 📄 Powertrain Clutch Clutch Type: Centrifugal clutch Drive System Chain Drive Type: Direct drive 📄 Components Chain Brake Chain Brake Mechanism: Inertia-activated chain brake Chain Tensioner Chain Tensioner Location: Side-mounted Starter Starter Type: Rewind starter Handle System Handle System Type: AV Handle System (Anti-Vibration) 📄 Tools Special Tools Special Servicing Tools Mentioned: Yes