🏷️ Basic Information Identification Make: Mercury Mariner Model: 8-9.9hp (4-stroke) Year: Not specified (manual covers a range of years for this engine series) Generation: Not applicable (engine series specific) 📋 Manual Details Description Manual Type: Official Service Manual Language: English Page Count: Not specified (PDF download implies variable page count) Format: PDF Download Content Features Instruction Format: Step-by-step instructions Illustration Detail: Hundreds of photos and illustrations Critical Information Highlight: Notes, cautions, and warnings Illustration Matching: Bold figure numbers Illustration Detail Enhancement: Enlarged inset views Navigation: Numbered table of contents Usage Target Audience: Do-it-yourselfers and experienced mechanics ⚙️ Engine Specifications General Engine Type: 4-stroke Power Output Horsepower Range: 8-9.9 hp Displacement Engine Displacement Cc: Not specified (specific to 8-9.9hp variants) Cooling System Cooling Method: Water-cooled (typical for outboards) Ignition System Ignition Type: Not specified (likely CDI or similar) 🔧 Transmission Drive Drive Type: Outboard Gear Reduction Gear Ratio: Not specified (specific to engine models) 🔧 Maintenance Lubrication Recommended Engine Oil: Not specified (refer to manual for specific oil type and viscosity) Recommended Gear Lube: Not specified (refer to manual for specific gear lube) Service Intervals Typical Service Interval: Refer to manual for specific intervals (e.g., annual, hours of operation) Fuel System Fuel Type: Unleaded gasoline Fuel Octane Rating: Refer to manual (typically 87 octane or higher) Spark Plugs Recommended Spark Plug Type: Not specified (refer to manual) Cooling System Water Pump Impeller Replacement: Refer to manual (typically every 2-3 years or as needed)