🏷️ Basic Information Identification Make: Mercury Marine Model: Mariner Outboard Model Variant: 225 EFI, 250 EFI, 3.0 Litre Marathon, 3.0 Litre SeaPro Year: Various (specific years covered by manual) Generation: Covered by Service Manual 📋 Manual Details Documentation Manual Type: Service Manual Manual Title: Mercury Mariner (outboard) 225-225 EFI-250 EFI-3.0 Litre Marathon-3.0 Litre SeaPro Service Manual PDF Download Language: English Format: PDF Download Availability: Downloadable Content Scope: Repair and Service Information Target Audience: Do-it-yourselfers and Experienced Mechanics ⚙️ Engine Specifications Powerhead Engine Type: Outboard Displacement: 3.0 Litre Configuration: V6 (likely) Fuel System: Electronic Fuel Injection (EFI) Ignition System: CDI (Capacitor Discharge Ignition) Cooling System: Water-cooled Performance Horsepower Rating 225: 225 HP Horsepower Rating 250: 250 HP 🔧 Transmission Drivetrain Type: Outboard Lower Unit (Gearcase) Gear Ratio: Specific to Model/Year (detailed in manual) Drive Type: Propeller Drive 📐 Dimensions Physical Shaft Length: Various (e.g., 20", 25") - specific to application 🔧 Maintenance Servicing Oil Type: Specific Mercury Outboard Gear Lubricant (detailed in manual) Oil Capacity Gearcase: Specific Capacity (detailed in manual) Maintenance Schedule: Detailed Intervals for Various Components (in manual) 📄 Features Operation Trim System: Power Trim and Tilt (likely) Starting System: Electric Start (likely) Alternator Output: Specific to Model (detailed in manual)