🏷️ Basic Information Identification Make: Mercury Mercruiser Model: Number 3 GM 4 Cylinder, GM 6 Cylinder, GM V-8 Cylinder Service Repair Workshop Manual Year: 1978-1984 Generation: Not Applicable 📋 Manual Details Manual Information Manual Type: Service Repair Workshop Manual Language: English Format: PDF Download Compatibility: All Versions of Windows & Mac Requirements: Adobe PDF Reader & WinZip Printable: Yes Content Coverage Covered Systems: • Important Information/Troubleshooting • Removal-Installation-Alignment • Electrical System • Fuel Systems • Exhaust System • Engine • Cooling System • Drive Systems • Power Steering System Manual Features Features: • Detailed illustrations • Step-by-step instructions • Hundreds of photos • Covers complete disassembly ⚙️ Engine Specifications Engine Types Engine Configurations: • GM 4 Cylinder Inline • GM 6 Cylinder Inline • GM V-8 Specific Models Mcm 120 Serial Numbers: 4952701 - 6255465 Mcm 140 Serial Numbers: 4918570 - 6256954 Mcm 165 Serial Numbers: 4884835 and Above Mcm 470 Serial Numbers: 4886620 - 6218036 Mcm 898 Serial Numbers: 4887830 - 6218461 Mcm 228 Serial Numbers: 4902305 - 6225266 Mcm 260 Serial Numbers: 4908850 - 6227756 Mcm 330 Serial Numbers: 4889680 - 6083144 Mcm 370 400 Serial Numbers: 4883520 - 6721534 Mcm 440 Cyclone Serial Numbers: 6181070 - OA429860 Mie 470 Serial Numbers: All Mie 228 Serial Numbers: 4931100 - 5907057 Mie 260 Serial Numbers: 5907058 - 6885891 Mie 340 Serial Numbers: 5889914 - OA307952 Engine Displacement Typical Displacements: Varied (4-cylinder, 6-cylinder, V-8) Engine Power Typical Power Ranges: 120 HP to 460 HP (approximate) 🔧 Transmission Transmission Types Transmission Options: • Velvet Drive (Borg-Warner) Transmission • Mercury Marine Transmission 🔧 Maintenance General Maintenance Maintenance Sections: • General Information • Maintenance