🏷️ Basic Information

Make:

Suzuki

Model:

Quad Runner 250 / King Quad 280

Model Variant:

250 / 280

Production Years:

1987-1998

👋 Introduction

Market Position:

The Suzuki Quad Runner 250 and King Quad 280 were popular utility ATVs in their era, known for their robust build and versatility in recreational and utility applications. This manual serves the DIY enthusiast and professional mechanic looking to maintain or repair these reliable machines.

Competitive Analysis:

Competed with other 250-300cc class ATVs from brands like Yamaha, Honda, and Kawasaki. Its key selling points included its selectable 4WD and its reputation for durability. This manual provides the necessary technical information to keep these competitive features in top working order.

Key Features:

Comprehensive coverage for both Quad Runner 250 and King Quad 280 models, immediate download access, emphasis on DIY repair to save costs.

📋 Manual Details

Coverage Areas:

All major mechanical and electrical systems, maintenance, troubleshooting, and repair procedures.

Page Count:

Not explicitly stated, but comprehensive factory service manuals typically range from 300-700+ pages.

Manual Type:

Factory Repair Service Manual

Language:

English

Format:

PDF Download

📖 Manual Coverage

Systems Covered:

Frame, Body Panel, Exhaust System, Lubrication System, Fuel System, Cooling System, Engine, Cylinder Head, Valves, Camshaft, Cylinder, Piston, Alternator, Starter Clutch, Sub-Transmission, Gearshift Linkage, Automatic Transmission, Crankcase, Crankshaft, Balancer, Front Wheel, Front Suspension, Steering, Rear Wheel, Rear Suspension, Brake System, Front Driving Mechanism, Rear Driving Mechanism, Battery, Charging System, Ignition System, Electric Starter, Lights, Meters, Switches, Selectable 4WD System, Automatic Transmission System, Wiring Diagram.

Procedures Included:

Routine maintenance, disassembly and reassembly, component inspection, adjustment procedures, troubleshooting diagnostics, electrical system testing, rebuild procedures.

Specific Procedures Included:

Engine top-end rebuild (cylinder, piston, rings, valves), carburetor overhaul and tuning, transmission inspection and repair, differential service, drive shaft and U-joint maintenance, brake caliper/wheel cylinder overhaul, electrical troubleshooting using wiring diagrams, chassis alignment checks.

Technical Depth:

Comprehensive, covering everything from basic maintenance schedules and fluid changes to complete engine and transmission rebuilds, and in-depth electrical system diagnostics.

Diagnostic Tools:

The manual likely details specifications for common diagnostic tools, such as torque wrenches, feeler gauges, compression testers, and multimeter settings for electrical testing.

📊 Manual Specifications

File Format:

PDF

Searchability:

Likely searchable text due to it being a professional PDF download, allowing for quick access to specific topics.

Print Quality:

Assumed to be high-quality, professional scans or digital originals suitable for printing.

Binding Type:

N/A (Digital Download)

Paper Type:

N/A (Digital Download)

⚙️ Engine Specifications

Engine Type:

4-stroke, OHC, forced air-cooled (specific designation might vary slightly between models/years, e.g., LT-F250, LT-F300).

Displacement:

Approximately 246cc for Quad Runner 250 and 279cc for King Quad 280.

Bore X Stroke:

Specifics for both 250 and 280 models detailed in the manual, crucial for piston ring and cylinder service.

Compression Ratio:

Manual will list the expected compression ratio for accurate engine diagnostics.

Horsepower:

Estimated 18-20 HP for 250 models and slightly higher for 280 models, depending on tuning and specific variant.

Torque:

Sufficient for utility work and trail riding, specifics would be detailed in the manual.

Fuel System:

Carburetor (likely a Mikuni single-barrel, specific model number in manual).

Oil Capacity:

Approx. 1.5-2.0 Liters (check manual for exact capacity and API classification, e.g., SAE 10W-40 API SG or higher).

Cooling Method:

Forced Air Cooling

🔧 Transmission

Transmission Type:

Automatic (Continuously Variable Transmission - CVT or torque converter type) with a shaft drive to the rear axle, and selectable 2WD/4WD.

Drive System:

Shaft Drive

Gear Ratios:

Detailed gear ratios for the sub-transmission (e.g., High/Low range) and final drive would be found in the manual.

Transmission Fluid Type:

Likely a dedicated ATV transmission fluid or a high-quality gear oil. Specific viscosity and API rating (e.g., GL-4) and capacity for the gearbox and final drive will be detailed.

📐 Dimensions

Length:

Dimensions will vary slightly between 250 and 280 models but typically around 75-80 inches (190-203 cm).

Width:

Typically around 40-45 inches (101-114 cm).

Height:

Typically around 40-45 inches (101-114 cm).

Dry Weight:

Approx. 450-550 lbs (204-250 kg), depending on specific model and features.

Ground Clearance:

Typically around 6-8 inches (15-20 cm).

🛡️ Safety Features

Safety Ratings:

ATVs of this era did not have standardized crash ratings like passenger vehicles. Safety is inherent in operation and design features detailed in the manual.

Active Safety Features:

Powerful braking system (front and rear drum or disc, depending on model/year), stable chassis design, thumb throttle for controlled acceleration, selectable 4WD for improved traction.

Passive Safety Features:

Handguards (optional/standard depending on trim), durable frame construction.

💡 Technology Features

Infotainment System:

N/A (Basic instrumentation: speedometer, odometer, neutral/reverse indicator, 4WD indicator).

Driver Assistance Features:

N/A (Focus is on mechanical operation, not electronic aids).

Connectivity Options:

N/A

Ignition Type:

CDI (Capacitor Discharge Ignition)

Lighting:

Halogen headlights, taillight, brake light. Manual covers bulb replacement and wiring.

🔧 Maintenance

Oil Change Interval:

Typically every 100 hours of operation or annually, whichever comes first. Specific recommendation in manual.

Air Filter Cleaning:

Recommended every 20-30 hours of operation, or more frequently in dusty conditions. Manual will provide cleaning/replacement procedure.

Spark Plug Replacement:

Recommended every 100 hours or annually. Manual will specify correct plug type (e.g., NGK CR6HSA or equivalent) and gap.

Engine Oil Type:

SAE 10W-40 API SG or higher, specifically for air-cooled 4-stroke engines. Manual will list precise specifications and Suzuki's recommended brands/types.

Coolant Type:

N/A (Air-cooled engine)

Brake Fluid Type:

DOT 3 or DOT 4 brake fluid, depending on whether drum or disc brakes are fitted. Manual will specify.

Gear Oil Type:

Manual will specify appropriate gear oil for front and rear differentials, likely GL-4 or GL-5.

Common Issues:

Carburetor gumming due to fuel instability, starter motor wear, occasional issues with the selectable 4WD engagement mechanism, and general wear and tear on suspension components common to ATVs of this age.

Preventative Maintenance:

Regular use of fuel stabilizer, keeping air filter clean, checking and topping off oil, and ensuring battery is in good condition are key for longevity.

📚 Vehicle History

Brand Heritage:

Suzuki has a long history of producing reliable and capable motorcycles and ATVs, known for their engineering prowess and performance.

Model Evolution:

The Quad Runner series evolved into the King Quad line, with the 250 and 280 models representing key stages of development in Suzuki's utility ATV offerings. These models paved the way for larger displacement King Quads.

Key Developments During Period:

The 1987-1998 period saw refinements in suspension, braking systems, and the introduction/enhancement of the 4WD system across the Quad Runner and early King Quad iterations.

Production Period:

1987-1998

Manufacturing Location:

Primarily Japan.

🏆 Awards & Recognition

Recognitions:

No specific major awards typically cited for individual ATV models of this era, but Suzuki's ATV line was generally well-regarded for durability and capability within its class.