🏷️ Basic Information Identification Make: Mercury Model: Mariner Outboard Model Designation: 40-50-55-60 Product Type: Service Manual Product Name: Mercury Mariner (outboard) 40-50-55-60 Service Manual PDF Download 📋 Manual Details Documentation Manual Type: Repair and Service Target Audience: Do-it-yourselfers and experienced mechanics Language: English Format: PDF Download Content Features: Step-by-step instructions, hundreds of photos and illustrations, detailed substeps, notes, cautions, warnings, numbered instructions, bold figure numbers, enlarged inset views ⚙️ Engine Specifications Engine Engine Type: Outboard Cylinder Configuration: Inline 3-Cylinder (Typical for these HP ranges) Displacement: Approximately 77 cubic inches / 1.3 Liters (Typical for these HP ranges) Power Output: 40-60 HP (Horsepower) Fuel Delivery: Fuel Injection (EFI) or Carbureted (Model Dependent) Ignition System: Electronic Ignition Cooling System: Water Cooled 🔧 Transmission Drivetrain Type: Outboard Lower Unit with Forward, Neutral, Reverse Gear Ratio: Variable by specific model and year (e.g., 1.83:1, 1.92:1) 🔧 Maintenance Lubrication Recommended Gear Lube: Mercury High Performance Gear Lubricant (or equivalent marine grade) Gear Lube Capacity: Approx. 0.3 - 0.4 Liters (Check specific model) Recommended Oil Type: Mercury 2-Stroke Outboard Oil (TCW3 rated) or SAE 25W-40 Synthetic Blend (4-Stroke Models) Oil Capacity: Varies significantly by model (2-stroke pre-mix or oil injection system for 2-stroke, specific oil sump for 4-stroke) Service Schedule Spark Plug Replacement Interval: Typically 100-200 operating hours or annually Water Pump Impeller Replacement Interval: Recommended every 1-2 years or 100-200 operating hours Fuel Filter Replacement Interval: Annually or as needed based on fuel quality