🏷️ Basic Information Identification Make: Yamaha Model: 4LD Outboard Year: 1990 Generation: N/A 📋 Manual Details Product Information Manual Type: Service Repair Maintenance Factory Professional Manual Language: English Page Count: Estimated N/A (digital format implies comprehensive content) Format: PDF Download Features Organization: Step-by-step procedures Illustrations: Exploded diagrams Searchability: Completely bookmarked and searchable ⚙️ Engine Specifications General Engine Type: Outboard Motor Displacement: Not explicitly stated in product description (common for 4LD to be ~25hp, but cannot confirm without manual content) Power: Not explicitly stated in product description (common for 4LD to be ~25hp, but cannot confirm without manual content) Configuration Cylinder Count: Not explicitly stated in product description Fuel Type: Gasoline Cooling Cooling System: Water-cooled 🔧 Transmission Drive System Type: Outboard Drive Gear Ratios Forward Gear: Not explicitly stated in product description Neutral Gear: Not explicitly stated in product description Reverse Gear: Not explicitly stated in product description 📐 Dimensions Physical Length: N/A Width: N/A Height: N/A Weight: N/A 🔧 Maintenance Routine Service Interval: Detailed within manual Fluids Oil Capacity: Detailed within manual Recommended Oil Type: Detailed within manual Parts Parts Diagrams: Included with disassembly sections 📄 Performance Propulsion Propeller Drive: Included in manual details 📄 Electrical Ignition Ignition System: Detailed within manual Charging Charging System: Detailed within manual