🏷️ Basic Information Identification Make: Mercury Mercruiser Model: Number 8 Marine Engines 4 Cylinder Generation: 1985-1989 📋 Manual Details Publication Manual Type: Factory Service Repair Workshop Manual Language: English Format: PDF Compatibility Operating Systems: Windows & Mac Requirements Required Software: Adobe PDF Reader & WinZip Features Printability: All pages printable Download Type: Instant Download ⚙️ Engine Specifications General Engine Type: 4 Cylinder Marine Engine Displacement: 3.7 Litre Power Power Output Hp: Varies by model (e.g., 165, 170, 180, 190) Fuel System Fuel System Type: Covered in manual Cooling System Cooling System Type: Covered in manual Exhaust System Exhaust System Type: Covered in manual 🔧 Transmission Drive System Drive Type: Sterndrive (MR / Alpha One) Drive Models: MR, Alpha One 🔧 Maintenance Repair Procedures Covered Procedures: Complete dis-assembly, Engine Mechanical, Electrical Systems, Fuel Systems, Cooling and Exhaust, Power Steering, Removal and Installation General Advice Purpose: DIY and experienced mechanic use, maintaining vehicle working properly 📄 Model Variations Serial Numbers Mcm 170 Mr: 6916779 to 0A475151 Mcm 170 Alpha One: 0A475152 to 0B434940 Mcm 165 Alpha One: 0B434941 to 0B774251 Mcm 3.7 Litre Alpha One: 0B774252 and Above Mcm 190 Mr: 6917368 to 0A475551 Mcm 190 Alpha One: 0A475552 to 0B436390 Mcm 180 Alpha One: 0B436391 to 0B775248 Mcm 3.7 Litre Lx Alpha One: 0B775249 and Above