🏷️ Basic Information Identification Make: Mercury MerCruiser Model: MerCruiser #30 Marine Engines Engine Family: 496CID / 8.1L Gasoline Engine Covered Models: 496 Mag HO (Sterndrive), 496 Mag (Sterndrive), 8.1S HO (Inboard), 8.1S Horizon (Inboard) 📋 Manual Details Manual Information Manual Type: Service Repair Manual Language: English Page Count: 355 File Format: PDF Requirements: Adobe PDF Reader Downloadable: True Compatibility: All Versions of Windows & Mac Features Illustrations Included: True Zoom Functionality: True Printable: True ⚙️ Engine Specifications Engine Overview Engine Type: Gasoline Displacement Cid: 496 Displacement Liter: 8.1 Engine Block Type: V-8 Fuel System Fuel Delivery System: Electronic Fuel Injection (EFI) Ignition System Ignition Type: Distributorless Ignition System (DIS) or similar electronic ignition Cooling System Cooling System Type: Closed Cooling System Exhaust System Exhaust Components: Manifolds, Elbows, Collectors Power Steering Power Steering System: Pump-driven Performance Typical Power Output Hp: Refer to specific model for exact HP rating (e.g., HO models often higher) 🔧 Transmission Transmission Options Sterndrive Transmission Options: • Velvet Drive 5000 Series • Hurth Transmission 🔧 Maintenance Maintenance Procedures Maintenance Sections: • General Information • Maintenance • Troubleshooting Repair Instruction Detail: Step-by-step procedures, disassembly, assembly, inspection, adjustment