🏷️ Basic Information Identification Make: Mercury Product Type: Outboard Motor Service Manual Models Covered: 45 Jet, 50, 55, 55 Marathon, 55 SeaPro, 60 Big Foot, 60 Marathon, 60 SeaPro Generation: Not specified in product description (refer to specific model years within manual) 📋 Manual Details Content Type Manual Type: Service Manual / Repair Manual Primary Purpose: Repair and Service Target Audience: Do-it-yourselfer and experienced mechanic Format Format: PDF Download Usage Options: Save to hard drive, burn to CD-ROM, print entire or specific pages Language Language: English (assumed based on product description) Content Features Instruction Style: Step-by-step, numbered instructions, detailed substeps Safety Information: Notes, cautions, and warnings Illustrations: Hundreds of photos and illustrations, detailed drawings Illustration Enhancements: Bold figure numbers for matching, enlarged inset for detailed part examination ⚙️ Engine Specifications General Engine Configuration: Inline 3-Cylinder (common for these HP ranges, requires manual confirmation) Power Horsepower Range: 45 HP to 60 HP Fuel System Fuel Delivery: Carbureted (typical for this era, requires manual confirmation) Cooling System Cooling Method: Water-cooled (standard for outboard motors) 🔧 Transmission General Type: Outboard Lower Unit (Forward, Neutral, Reverse) Gear Ratios Gear Ratios: Specific to each model/variant (refer to manual for details) 🔧 Maintenance Lubrication Gearcase Lube Type: Specific Mercury marine gear lube (refer to manual) Gearcase Lube Capacity: Specific to model (refer to manual) Ignition System Spark Plug Type: Specific to engine (refer to manual) Fuel System Fuel Type: Unleaded gasoline (typical, refer to manual) Fuel Octane Rating: 87 Octane (typical, refer to manual) Cooling System Water Pump Impeller Replacement: Recommended periodic maintenance 📄 Performance Thrust Jet Drive Capability: Present in 45 Jet model 📄 Electrical System Ignition Ignition System Type: CDI (Capacitor Discharge Ignition) (common for this era) 📄 Propulsion Propeller Propeller Material: Aluminum (common, variations may exist) Propeller Pitch: Variable depending on boat and application