The 2008 Polaris Dragon RMK 155 is a high-performance snowmobile engineered for experienced riders seeking exceptional off-trail capability and deep snow performance. Built on the agile RMK chassis, this model features a long-travel suspension system and a 155-inch track designed to provide superior flotation and traction in challenging backcountry conditions. Its robust 700cc, liquid-cooled, parallel-twin, 2-stroke Liberty engine, likely equipped with Electronic Fuel Injection (EFI), delivers estimated horsepower in the 120-135 HP range, optimized for climbing power. The Continuously Variable Transmission (CVT) ensures smooth power delivery, while the hydraulic disc brake system offers reliable stopping power. The Dragon RMK 155 embodies Polaris's legacy of innovation in off-road performance. This workshop repair service manual provides comprehensive coverage for the 2008 Polaris Dragon RMK 155 snowmobile. It details essential service, maintenance, troubleshooting, and repair procedures across all major systems, including the engine, fuel system, ignition, drivetrain, suspension, braking, and electrical systems. With over 500 pages of information, this English-language manual includes step-by-step instructions for routine maintenance, engine overhauls, clutch service, and electrical diagnostics, along with detailed torque specifications and diagnostic parameters. This resource is designed to assist owners, mechanics, and technicians in maintaining the optimal performance and longevity of their vehicle. 🏷️ Basic Information Identification Make: Polaris Model: Dragon RMK 155 Year: 2008 Vehicle Type: Snowmobile Codes Vin Decoder Note: VIN decoding specific to snowmobiles generally follows a different structure than automobiles, but typically includes manufacturer code, model designation, and serial number. 👋 Introduction Market Position Segment: High-performance mountain/backcountry snowmobile. Target Audience: Experienced riders seeking off-trail capability, deep snow performance, and robust engineering. Competitive Analysis Key Competitors: Ski-Doo Summit, Arctic Cat M-Series. Key Features Chassis Design: RMK chassis optimized for agility, weight distribution, and deep snow handling. Suspension Travel: Long-travel front and rear suspension systems for tackling challenging terrain. Track Length: 155-inch track length for enhanced flotation and traction in deep snow. 📋 Manual Details Coverage Areas Primary Coverage: Service, Maintenance, Troubleshooting, Repair Page Count Estimated Pages: Over 500 (typical for comprehensive service manuals) Manual Type Type: Workshop Repair Service Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine Mechanics: Complete engine assembly, disassembly, overhaul, cylinder head, pistons, crankshaft, connecting rods, lubrication system, cooling system. Fuel System: Fuel pump, fuel injectors, fuel lines, fuel filter, throttle body, carburetor systems (if applicable to specific variants). Ignition System: Spark plugs, ignition coils, CDI unit, stator, wiring diagrams for ignition. Drivetrain: Primary drive clutch, secondary clutch (drive clutch), chaincase, drive chain, sprocket replacement, gearcase lubrication. Suspension: Front suspension (IFS), rear suspension (RMK specific ProRide or similar), shock absorbers, springs, control arms, pivot points, skis, track system. Braking System: Brake caliper service, master cylinder, brake lines, brake fluid, rotor replacement, brake lever adjustments. Electrical System: Lighting system, starting system, battery, charging system, wiring harness, handlebar controls, sensors, diagnostic codes. Bodywork And Chassis: Plastic body panels, seat, handlebars, steering column, chassis components, storage compartments. Cooling System: Radiator, coolant hoses, thermostat, coolant specifications, fan operation. Procedures Included Routine Maintenance: Oil changes, filter replacements, lubrication points, track tension adjustment, clutch inspection. Troubleshooting: Diagnostic procedures for common starting issues, performance problems, electrical faults, and mechanical failures. Engine Rebuild: Step-by-step instructions for complete engine overhaul, including torque specifications and tolerances. Clutch Service: Clutch alignment, spring replacement, weight adjustment, belt replacement, cleaning and inspection. Suspension Adjustment And Repair: Shock absorber rebuilds, spring preload adjustments, component replacements. Electrical Diagnostics: Using multimeters, interpreting wiring diagrams, testing sensors and actuators, troubleshooting electrical shorts and open circuits. Track And Skid System Maintenance: Track inspection for damage, bearing service, slider rail replacement, ski-doo alignment. Fuel System Cleaning And Testing: Injector cleaning procedures, fuel pressure testing. Technical Depth Depth: Comprehensive, covering basic to advanced repairs and diagnostics, including complete engine and drivetrain overhauls. Precision: Includes detailed torque specifications, clearances, and diagnostic parameters essential for accurate repairs. 📊 Manual Specifications File Format File Type: PDF Searchability: Text-searchable for quick information retrieval. Print Quality Printability: High-resolution, suitable for printing individual pages or the entire manual. Binding Type Binding: N/A (Digital PDF Download) Paper Type Paper Quality: N/A (Digital PDF Download) ⚙️ Engine Specifications Primary Engine Engine Family: Liberty Engine Configuration: Parallel-Twin, 2-stroke Displacement: 700cc (approximate, actual may vary slightly based on specific bore/stroke) Cooling System: Liquid-cooled Bore X Stroke: Specific to the 700cc Liberty twin, requires manual for exact figures. Performance Horsepower: Estimated 120-135 HP (typical for this displacement and era). Torque: Not explicitly stated, but optimized for low-end and mid-range power for climbing. Fuel System Fuel Delivery: Fuel Injection (EFI - Electronic Fuel Injection) likely for 2008 model year. Fuel Type: Unleaded gasoline Oil System Oil Delivery: 2-stroke oil injection system (Auto-Lube) Oil Type: Specific Polaris 2-stroke synthetic injection oil (e.g., Polaris Synthetic 2-Stroke Oil) 🔧 Transmission Standard Type: CVT (Continuously Variable Transmission) Clutches: Variable ratio drive clutch (Primary) and driven clutch (Secondary). Features...