🏷️ Basic Information Identification Make: Mercury Mercruiser Model: GM V-8 Cylinder Engine (Number 9) Year: 1985-1988 Generation: Fourth Generation (for Mercruiser applications) 📋 Manual Details Publication Info Manual Type: Workshop Service Repair Manual Language: English Format: PDF Download Compatibility: All Versions of Windows & Mac Requirements: Adobe PDF Reader Content Overview Covered Systems: Removal and Installation, Engine, Electrical System, Fuel System, Cooling System, Exhaust System, Drive Systems, Power Steering ⚙️ Engine Specifications Configuration Engine Type: V-8 Gasoline Displacement: Varies (Common GM V8 displacements for this era: 305 ci, 350 ci, 454 ci) Bore Stroke: Varies by specific GM V8 engine Fuel Induction: Carbureted or Fuel Injected (depending on specific engine variant) Ignition System: Electronic Ignition (HEI or similar) Cooling System Cooling Type: Closed Cooling System (typically freshwater cooled with heat exchanger) Power Output Horsepower: Varies significantly by engine displacement and tuning (e.g., 200-350 HP) Torque: Varies significantly by engine displacement and tuning 🔧 Transmission Drive System Type: Marine Sterndrive or Inboard (depending on specific Mercruiser application) Gears: Typically 2-speed forward, 1-speed reverse, Neutral (for sterndrive units) 🔧 Maintenance Lubrication Recommended Engine Oil: SAE 25W-40 Marine Engine Oil (typical) Recommended Drive Oil: Quicksilver High Performance Gear Lubricant (or equivalent marine gear oil) Cooling System Coolant Type: 50/50 mixture of Ethylene Glycol antifreeze and water Fuel System Fuel Type: Unleaded Gasoline