🏷️ Basic Information Identification Make: Mercury Mariner Model: Marathon 70 Hp Year: 1987-1993 Generation: Pre-Outboard Modernization Era 📋 Manual Details Information Manual Type: Service and Repair Manual Language: English Format: PDF, WINRAR Delivery: Instant Download Compatibility Operating Systems: Win95/98/ME/XP/vista/7/8/Linux/MAC, iOS, Android ⚙️ Engine Specifications General Engine Type: Outboard Motor Cylinder Count: 3 Horsepower: 70 Technical Carburetion: Yes Oil Injection: Yes Ignition System: Standard Ignition Charging System: Battery Charging System Starting System: Electric Start Power Trim: Available (Design I and Design II) 🔧 Maintenance Routine Maintenance Scope: Comprehensive for repair and upkeep Preventive Maintenance: Emphasis on problem prevention Fluid Capacities Gear Housing Oil Capacity: Refer to manual Oil Injection System Capacity: Refer to manual 📄 System Components Drivetrain Lower Unit Description: Included Gear Housing Description: Included Engine Powerhead Description: 3-Cylinder and potentially 4-Cylinder (contextual, likely refers to variations within the 70hp range or manual structure) Mid Section Description: Included Controls Tiller Handle Description: Included Co Pilot Description: Included Cooling Cooling System Details: Covered in manual Fuel Fuel System Description: Included 📄 Electrical System Ignition Timing Adjustment: Covered Wiring Wiring Diagrams: Included 📄 Manual Content Scope Electrical And Ignition Coverage: Comprehensive Fuel And Carburetion Coverage: Comprehensive Engine Troubleshooting: Detailed Installation Attachments: Covered