🏷️ Basic Information Identification Make: Mazda Model: RX3 Year: 1975 Codes Chassis Code: S102A (Coupe), S124A (Sedan), S132A (Wagon) 👋 Introduction Market Position Market Position: The 1975 Mazda RX3 was a significant model for Mazda, particularly in introducing their rotary engine technology to a wider global audience. It was positioned as a stylish and sporty compact car, often appealing to enthusiasts seeking an alternative to conventional piston engines. Competitive Analysis Competitive Analysis: Competed against other compact sporty cars of the era such as the Toyota Corolla, Datsun 710, and Ford Pinto. Its primary differentiator was the unique rotary (Wankel) engine, offering a smooth and high-revving experience. Key Features Key Features: Rotary Engine (unique selling proposition), RWD platform, stylish coupe, sedan, and wagon body styles, relatively affordable entry into sporty motoring. Engine Type Distinctiveness: The rotary engine offers a high power-to-weight ratio and smooth operation compared to piston engines of similar displacement. 📋 Manual Details Coverage Areas Coverage Areas: Engine, Emission Control System, Lubricating System, Cooling system, Fuel system, Electrical System, Clutch, Transmission, Propeller Shaft, Steering, Brakes, Suspension, Body, and more. Page Count Page Count: Estimated 500+ pages (typical for factory service manuals of this era) Manual Type Manual Type: Factory Service & Repair Manual Manual Classification: Comprehensive workshop manual, designed for professional technicians and advanced DIY enthusiasts. Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Systems Covered: Engine Mechanical, Engine Electrical, Fuel System (including carburetion), Ignition System, Lubrication System, Cooling System, Emission Control Systems (relevant to 1975 standards), Clutch System, Manual Transmission (4-speed and 5-speed), Automatic Transmission (optional), Driveshaft, Rear Axle, Steering System, Front Suspension, Rear Suspension, Brake System (disc front, drum rear), Electrical Components (lighting, wipers, horn, instrumentation), Body and Chassis, Interior Trim, HVAC System (if equipped). Procedures Included Procedures Included: Routine Maintenance, Scheduled Maintenance, Troubleshooting of Common Problems, Component Removal and Installation, Component Disassembly and Reassembly, Adjustment Procedures, Torque Specifications, Wiring Diagrams, Vacuum Diagrams, Diagnostic Procedures, Overhaul Procedures, Component Testing, Wheel Alignment Specifications, Brake Bleeding Procedures, Clutch Adjustment, Engine Tune-Up. Body Repair: Basic body repair procedures, panel alignment, trim removal and installation, glass replacement guidance. Technical Depth Technical Depth: Comprehensive, covering everything from basic fluid changes and tune-ups to complete engine rebuilds, transmission overhauls, and detailed electrical system diagnostics. Includes step-by-step instructions and detailed diagrams for most workshop procedures. Diagnostic Procedures: Includes specific diagnostic flowcharts and troubleshooting guides for common drivability issues and electrical faults. Diagrams Diagrams Included: Detailed wiring diagrams, vacuum schematics, exploded views of components, torque sequence diagrams. 📊 Manual Specifications File Format File Format: PDF Searchable Text: Likely includes searchable text within the PDF, aiding in quick information retrieval. Print Quality Print Quality: Digital PDF, quality of original factory documentation. Binding Type Binding Type: Not Applicable (Digital Download) Paper Type Paper Type: Not Applicable (Digital Download) Compatibility Compatibility: Compatible with all versions of Windows & Mac. Requirements Requirements: Adobe PDF Reader. ⚙️ Engine Specifications Primary Engine Primary Engine: Mazda 13B Rotary (Two-Rotor Wankel) Displacement Displacement: 1.3 Liters (79.1 cu in) Horsepower Horsepower: Approx. 110-125 HP (varies by market and specific engine tune, e.g., US models often had lower output due to emissions) Torque Torque: Approx. 117-135 lb-ft Fuel System Fuel System: Twin Downdraft Carburetor (e.g., Hitachi SH20 or similar). Fuel Type: Unleaded gasoline (typically 91 octane or higher recommended for optimal performance and longevity). Rotor Design Rotor Design: Apex seals, side seals, corner seals. Lubrication System Lubrication System: Wet sump, oil cooler often integrated. Ignition System Ignition System: Distributor-based, dual ignition coils (one per spark plug per rotor housing for optimal combustion timing). Emissions Control Emissions Control: Air injection system, exhaust gas recirculation (EGR), thermal reactor (depending on market). Manual provides specific details on these systems. Engine Mounting Engine Mounting: Engine and transmission mounted as a single unit with rubber isolation mounts. Performance 0 60 Mph: Approx. 9-11 seconds (depending on transmission and driver). 🔧 Transmission Standard Standard Transmission: 4-speed Manual Optional Optional Transmission: 3-speed Automatic (less common) Features Features: Rear-wheel drive, synchromesh on all forward gears. Gear Ratios Gear Ratios: Specific gear ratios for 4-speed and optional 3-speed automatic are detailed in the manual. 📐 Dimensions Exterior Wheelbase: Approx. 95.5 inches Length: Approx. 162.8 inches (Coupe) Width: Approx. 63.2 inches Height: Approx. 52.6 inches (Coupe) Track Width Front: Approx. 52.2 inches Track Width Rear: Approx. 51.6 inches Weights Curb Weight: Approx. 2,100 - 2,300 lbs Gross Vehicle Weight Rating: GVWR specified in manual, typically around 3,000 lbs. 🛡️ Safety Features Ratings Safety Ratings: Not rated by modern standards; typical safety features for the era. Active Features Active Features: Front Disc Brakes, Rear Drum Brakes, Limited-slip differential (optional on some performance variants). Passive Features Passive Features: Lap belts, padded dashboard, crumple zones (early development). 💡 Technology Features Infotainment Infotainment System: Basic AM/FM radio, possibly with cassette player (optional, depending on trim...