🏷️ Basic Information Identification Make: Mercury Model: Mariner Sub Model: 30-40 Marathon, 40 SeaPro, 30 SeaPro Engine Configuration: 2 Cylinders Generation: Marathon/SeaPro Series (specific generation not explicitly stated in product description, but implies a specific era of these models) 📋 Manual Details Information Manual Type: Service Manual Manual Purpose: Repair and Service Target Audience: Do-it-yourselfer and Experienced Mechanic Content Detail: Step-by-step instructions, hundreds of photos and illustrations, detailed substeps, notes, cautions, warnings, numbered instructions, bold figure numbers, enlarged insets Format: PDF Download (printable, burnable to CDROM, storable on hard drive) Language: English (implied by standard service manual practices) ⚙️ Engine Specifications General Engine Type: Outboard Power Output Horsepower Range: 30-40 HP Cylinder Count Cylinders: 2 Fuel System Fuel Delivery: Carbureted (common for this era of outboards, not explicitly stated but inferred) Ignition System Ignition Type: CDI (Capacitor Discharge Ignition - common for this era, not explicitly stated) 🔧 Transmission Drive Drive Type: Outboard Lower Unit Gears Gear Selection: Forward, Neutral, Reverse (standard for outboard transmissions) 🔧 Maintenance Lubrication Gearcase Oil Capacity: Specific capacity to be found within the manual Recommended Oil Type: Specific type to be found within the manual Service Schedule Recommended Maintenance Intervals: Detailed intervals to be found within the manual 📄 Cooling System Cooling Method Cooling: Water-cooled (standard for outboard motors) 📄 Electrical System Starting System Starter Type: Electric Start (likely, as service manuals cover this) or Recoil Start (possible for lower HP models) 📄 Performance Propulsion Propeller Drive: Propeller