🏷️ Basic Information Identification Make: MerCruiser Engine Manufacturer: General Motors (GM) Engine Family: 6 Cylinder Covered Years: 1983-1993 📋 Manual Details Documentation Manual Type: Service Manual Manual Scope: Engine Repair Only (Excludes Stern Drive and Transom Assembly) Format: PDF Download Language: English Target Audience: Technicians, experienced DIY mechanics Content Overview Included Procedures: Inspection, Service, Overhaul, Troubleshooting, Specifications Excluded Information: General knowledge, Stern drive unit repair, Transom assembly repair User Guidance Recommendation For Novices: Exercise caution; assistance recommended for those without prior knowledge or proper tools. Accessibility Software Requirement: No special software required (standard PDF reader) ⚙️ Engine Specifications Engine Configuration Engine Type: Inline 6 Cylinder (I6) Displacement 229 Cid: 229 cubic inches 3.8L: 3.8 Liters 262 Cid: 262 cubic inches 4.3L: 4.3 Liters Power Mcm 185R Horsepower: 185 HP (estimated, specific rating may vary by application) Mcm 175 Alpha One Horsepower: 175 HP (estimated, specific rating may vary by application) Mcm 205 Mr Horsepower: 205 HP (estimated, specific rating may vary by application) 📄 Model Coverage Engine Models Mcm 185R 229 Cid: Serial Numbers 6289593 to 6919655 Mcm 185Mr 262 Cid: Serial Numbers 6919656 to OA483580 Mcm 185 Alpha One: Serial Numbers OA483581 to OB455459 Mcm 175 Alpha One: Serial Numbers OB455460 to OB773242 Mcm 4.3 Liter Alpha One: Serial Numbers OB773243 to OF000000 Sea Ray 4.3L 2 Alpha One: Serial Numbers OB785483 to B921276 Mcm 205 Mr: Serial Numbers 6919687 to OA483776 Mcm 205 Alpha One: Serial Numbers OA483777 to OB775129 Mcm 4.3 Liter Lx Alpha One: Serial Numbers OB773130 to OF000000 Sea Ray 4.3L 4 Alpha One: Serial Numbers OB785981 to B922330