The 2010 Sportsman 300 and 400 HO represents a capable All-Terrain Vehicle (ATV) designed for versatility and reliable performance across various terrains. Building on a reputation for engineering quality, this model is equipped with features such as signature independent rear suspension (IRS) for enhanced ride comfort, an effective All-Wheel Drive (AWD) system, and a robust chassis. The Sportsman line is known for its comfortable ergonomics, making it suitable for recreational riders, hunters, farmers, and general utility users seeking a dependable machine for work or adventure. This comprehensive factory service manual provides in-depth coverage for the 2010 Sportsman 300 and 400 HO ATVs. It details essential service, repair, and workshop procedures, alongside maintenance schedules, troubleshooting guides, and diagnostic information. Key areas covered include engine systems, transmission, drivetrain, chassis, electrical components, and braking systems. The manual is designed to assist owners, mechanics, and technicians in accurately maintaining, diagnosing, and repairing the vehicle, ensuring its optimal performance and longevity. 🏷️ Basic Information Identification Make: Polaris Model: Sportsman 300 / 400 HO Model Year: 2010 Vehicle Type: All-Terrain Vehicle (ATV) Product Name: Polaris Sportsman 300 400 HO ATV 2010 Service Repair Workshop Manual Pdf Codes Product Code: Not Specified 👋 Introduction Market Position Segment: Mid-size utility ATV segment, known for its versatility and reliable performance. Target Audience: Recreational riders, hunters, farmers, and general utility users. Competitive Analysis Key Competitors: Honda FourTrax, Yamaha Grizzly, Can-Am Outlander, Kawasaki Brute Force. Key Features Vehicle Strengths: Polaris's signature independent rear suspension (IRS) for a smoother ride, effective AWD system, comfortable seating position, and robust chassis. Manual Value Proposition: Provides authoritative, factory-accurate information for maintaining, diagnosing, and repairing the 2010 Polaris Sportsman 300 and 400 HO, saving time and money on repairs. 📋 Manual Details Coverage Areas Primary Coverage: Service, Repair, Workshop Secondary Coverage: Maintenance, Troubleshooting, Diagnostics, Overhaul Page Count Estimated Page Count: Variable, but typically 500-1000+ pages for comprehensive factory manuals. Manual Type Type: Factory Service Manual Language Language: English Format Format: PDF (Portable Document Format) 📖 Manual Coverage Systems Covered Engine Systems: Engine removal/installation, cylinder head, piston, crankshaft, camshaft, valve train, cooling system, lubrication system, fuel system (carburetor for 300, EFI for 400 HO), exhaust system, ignition system. Transmission Systems: Automatic transmission (PVT - Polaris Variable Transmission) disassembly/assembly, clutch operation, belt inspection/replacement, gear case maintenance, drive system. Drivetrain Systems: All-Wheel Drive (AWD) system, Active Descent Control (ADC), rear differential, front differential, driveshafts, CV joints, wheel bearings. Chassis And Frame: Frame inspection, suspension components (front and rear), shocks, A-arms, steering system, wheel alignment, tires, wheels. Electrical Systems: Battery, charging system (stator, regulator/rectifier), starting system (starter motor, solenoid), lighting system (headlights, taillights, brake lights), ignition switch, wiring diagrams, sensors, EFI control unit (for 400 HO). Braking Systems: Hydraulic disc brakes (front and rear), brake calipers, brake lines, master cylinder, brake pads, brake fluid specifications and bleeding procedures. Body And Trim: Body panel removal/installation, fenders, racks, seat, handle grips, controls. Procedures Included Maintenance Procedures: Oil changes, filter replacements, spark plug replacement, air filter cleaning/replacement, coolant checks, brake fluid flush, battery maintenance, belt inspection, lubrication points. Repair Procedures: Engine overhaul (top-end and bottom-end), transmission repair, differential rebuilds, suspension component replacement, brake system repairs, electrical component diagnostics and replacement, steering system repairs. Troubleshooting Guides: Diagnostic flowcharts for common starting, running, and electrical issues. Symptom-based troubleshooting for engine performance problems. Diagnostic Procedures: EFI fault code retrieval and interpretation (for 400 HO), ignition timing checks, compression testing, electrical circuit testing with multimeter, fuel pressure testing (where applicable). Technical Depth Depth Level: Comprehensive Factory Level Diagnostic Scope: Advanced diagnostic procedures, including wiring diagrams for electrical systems and fuel injection troubleshooting. Rebuild Scope: Complete engine and transmission rebuild instructions, including torque specifications, clearances, and assembly sequences. 📊 Manual Specifications File Format File Type: PDF Searchability: Typically searchable text within the PDF for easy navigation. Print Quality Quality: High resolution, suitable for printing individual pages or the entire manual. Binding Type Binding: N/A (Digital Download) Paper Type Paper: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Sportsman 300 Engine Type: 4-stroke, SOHC, Liquid-Cooled Single Cylinder Sportsman 300 Displacement: 272cc Sportsman 400 Ho Engine Type: 4-stroke, SOHC, Liquid-Cooled Single Cylinder Sportsman 400 Ho Displacement: 375cc Performance Sportsman 300 Horsepower: Approximately 17-19 HP (estimated) Sportsman 400 Ho Horsepower: Approximately 28-30 HP (estimated) Bore X Stroke 300: 69mm x 73.2mm (estimated) Bore X Stroke 400 Ho: 84mm x 68mm (estimated) Fuel System Sportsman 300 Fuel Delivery: Carburetor (e.g., Mikuni BSR32) Sportsman 400 Ho Fuel Delivery: Electronic Fuel Injection (EFI) Fuel Type: Unleaded Gasoline (91 octane recommended) Fuel Tank Capacity: 3.3 gal (12.5 L) 🔧 Transmission Standard Type: Automatic Polaris Variable Transmission (PVT) with Engine Braking Drive Selection: High, Low, Neutral, Reverse Optional Optional Transmission: N/A (All models for this year use PVT) Features Primary Drive: Shaft Drive Final Drive: Sealed O-ring chain Clutch Type: High-performance, variable-speed drive clutch and driven...