Vehicle Segment:
Utility ATV (All-Terrain Vehicle)
Target Audience:
Outdoor enthusiasts, hunters, farmers, trail riders, and recreational users.
Key Competitors:
Can-Am Outlander 400, Yamaha Grizzly 400, Honda Rancher 400.
Powertrain Configuration:
Proven single-cylinder engine with automatic PVT transmission and selectable 2WD/AWD.
Suspension Design:
Independent front suspension and progressive-rate fully-independent rear suspension (IRS) for rider comfort and capability.
Utility Features:
Front and rear cargo racks with substantial weight capacities, tow hitch.
Manual Value Proposition:
Empowers owners and technicians with the official, detailed knowledge required for accurate maintenance and repair, ensuring vehicle longevity and performance.
Covered Years:
2008, 2009, 2010
Covered Models:
Polaris Sportsman 400 HO
Page Count:
Not Specified in Product Information
Manual Type:
Factory Service Repair Manual
Language:
English (Assumed based on typical product offerings for this market)
Format:
Digital (Likely PDF, based on typical online sales of service manuals)
Engine Overhaul:
Complete engine disassembly, inspection, repair, and reassembly procedures.
Fuel System:
Carburetor tuning, cleaning, and replacement; fuel pump and filter service.
Ignition System:
Spark plug service, ignition coil testing, CDI unit troubleshooting.
Cooling System:
Radiator service, fan operation, coolant specifications and bleeding procedures.
Transmission And Drivetrain:
PVT (Polaris Variable Transmission) operation, belt inspection and replacement, clutch service, AWD system troubleshooting and repair.
Chassis And Suspension:
Front and rear suspension component inspection, adjustment, and replacement (shocks, control arms, bushings).
Brakes:
Brake caliper service, hydraulic system bleeding, pad and rotor replacement.
Electrical System:
Wiring diagrams, starter, alternator, battery, lighting, and accessory circuits.
Bodywork And Plastics:
Panel removal and installation, fender, rack, and seat service.
Routine Maintenance:
Oil changes, filter replacements, air filter cleaning/replacement, spark plug checks, lubrication points.
Troubleshooting Guides:
Systematic diagnostic procedures for common and uncommon performance issues.
Component Replacement:
Step-by-step instructions for replacing major and minor components.
Specifications And Tolerances:
Torque values, clearances, and critical measurements for all systems.
Special Tool Requirements:
Identification and usage of specialized tools for specific repair procedures.
Depth Of Coverage:
Comprehensive, covering routine maintenance to complete engine and transmission rebuilds.
Diagnostic Capabilities:
Detailed troubleshooting flowcharts and symptom-based diagnostics.
Repair Complexity:
Suitable for both amateur DIY mechanics and professional technicians.
Digital Format:
PDF (Portable Document Format) - typical for digital service manuals.
Searchability:
Likely text-searchable if properly indexed PDF.
Illustrations:
High-quality diagrams, exploded views, and photographs (typical for factory manuals).
Binding:
Not applicable for digital format; if printed, would be spiral-bound or perfect-bound for workshop use.
Paper Quality:
Not applicable for digital format; if printed, would typically be on durable, coated paper suitable for workshop environments.
Engine Type:
4-stroke, liquid-cooled, SOHC, single-cylinder
Engine Displacement:
375 cc (Note: Often referred to as 400 HO due to marketing/performance, but the actual displacement is 375cc)
Bore X Stroke:
Not Specified in Product Information (but detailed in manual)
Compression Ratio:
Not Specified in Product Information (but detailed in manual)
Horsepower:
Approx. 26 hp (Estimate based on typical 375cc engines of the era; manual will have precise figure)
Torque:
Not Specified in Product Information (but detailed in manual)
Fuel Delivery:
Carburetor (likely Mikuni or Keihin) - Specific model detailed in manual.
Fuel Type:
Unleaded gasoline
Fuel Capacity:
3.0 gal (11.4 L) (Estimated, check manual for exact figure)
Oil Type:
API SG or higher, SAE 10W-40 (Refer to manual for exact specification and capacity)
Transmission Type:
Polaris Variable Transmission (PVT) with Engine Braking
Drive Modes:
2WD / AWD (On-Demand)
Optional Transmission:
N/A (PVT is standard)
Gear Selection:
High, Low, Neutral, Reverse, Park
Belt Material:
Composite CVT belt (Specifications and replacement intervals in manual)
Differential Oil:
Refer to manual for specific front/rear differential oil type and capacity.
Length:
81 in. (205.7 cm) (Estimate, check manual for exact figure)
Width:
46 in. (116.8 cm) (Estimate, check manual for exact figure)
Height:
47 in. (119.4 cm) (Estimate, check manual for exact figure)
Wheelbase:
50.25 in. (127.6 cm) (Estimate, check manual for exact figure)
Dry Weight:
567 lbs (257 kg) (Estimate, check manual for exact figure)
Ground Clearance:
11.25 in. (28.6 cm) (Estimate, check manual for exact figure)
Front Rack Capacity:
100 lbs (45.4 kg) (Estimate)
Rear Rack Capacity:
200 lbs (90.7 kg) (Estimate)
Towing Capacity:
1050 lbs (476.3 kg) (Estimate)
Tire Size Front:
AT 25 x 8-12 (Specific tread pattern in manual)
Tire Size Rear:
AT 25 x 11-10 (Specific tread pattern in manual)
Wheel Bolt Pattern:
4x110mm (Common for Polaris; verify in manual)
Safety Certifications:
EPA Approved (for emissions and operation in certain areas)
Braking System:
Hydraulic disc brakes front and rear.
Engine Braking:
Integrated into the PVT system for downhill control.
Aawd System:
On-demand All-Wheel Drive provides enhanced traction when needed.
Ergonomics:
Comfortable seating position and handlebar controls designed for rider comfort and control.
Lighting:
Dual headlights and a single taillight/brake light for visibility.
Initial Service:
First service typically around 20 hours or 3 months (refer to manual for exact hours/miles/months).
Engine Oil Change:
Every 100 hours or 6 months (check manual for precise interval and oil capacity).
Air Filter Service:
Inspect every 50 hours, clean/replace as needed. Heavy dust conditions may require more frequent service.
Spark Plug Replacement:
Check and clean at 100 hours, replace as needed (refer to manual for correct plug type and gap).
Clutch Belt Inspection:
Inspect CVT belt for wear and damage every 50 hours, replace as recommended.
Engine Oil Specification:
SAE 10W-40 API SG or higher (Refer to manual for exact Polaris-branded or equivalent oil specification).
Coolant Type:
Ethylene glycol-based antifreeze solution with corrosion inhibitors (Refer to manual for specific type and mix ratio).
Brake Fluid:
DOT 3 or DOT 4 hydraulic brake fluid (Refer to manual for exact specification).
Gearcase Oil Front Rear:
Specific Polaris synthetic gearcase lubricant or equivalent (Refer to manual for part numbers and capacities).
Common Wear Items:
CVT belt, ball joints, tie rod ends, wheel bearings, brake pads are common wear items on ATVs of this age and design.
Charging System:
Potential for stator or voltage regulator issues over time, check charging voltage per manual specifications.
Fuel System Maintenance:
Carburetor gumming can occur if fuel sits for extended periods; periodic cleaning and stabilizer use recommended.
Polariss Atv Legacy:
Polaris has a long history of innovation in the ATV market, pioneering many features and segment designs.
Sportsman Lineage:
The Sportsman line is Polaris' flagship utility ATV series, known for its comfort, capability, and versatility. The 400 HO represented a popular mid-size offering.
Manufacturing Location:
Polaris vehicles are primarily manufactured in the United States, with specific plant locations often being Spirit Lake, Iowa or Roseau, Minnesota (verify for specific model year).
Model Significance:
The 2008-2010 models were part of a significant generation that refined the Sportsman platform, offering a balance of power and agility for its class.
