🏷️ Basic Information Identification Make: Yamaha Model: 4 LD Outboard Year: 1990 Generation Generation: N/A 📋 Manual Details General Manual Type: Service Repair Maintenance Manual Language: English Format: PDF Download Features Bookmarking: Yes Searchability: Yes Content Coverage: Comprehensive (Disassembly, Repair, Assembly, Inspection) ⚙️ Engine Specifications General Engine Type: Outboard Motor Displacement: N/A (Specific to 4 LD model) Power: N/A (Specific to 4 LD model) Configuration Cylinder Count: N/A (Likely single-cylinder for this size) Cooling Cooling System: Water Cooled (Typical for Outboards) 🔧 Transmission General Type: Outboard Lower Unit Gearcase Gear Ratios: N/A (Specific to 4 LD model) 📐 Dimensions Physical Length: N/A (Dependent on specific model variant) Width: N/A (Dependent on specific model variant) Height: N/A (Dependent on specific model variant) Weight: N/A (Dependent on specific model variant) 🔧 Maintenance Intervals Service Interval General: Refer to manual for specific intervals Fluids Engine Oil Capacity: Refer to manual for specific capacity Gear Lube Capacity: Refer to manual for specific capacity Parts Exploded Diagrams: Yes (Included before disassembly sections) 📄 Technical Features Diagnostics Diagnostic Procedures: Included Troubleshooting Troubleshooting Guide: Included Wiring Wiring Diagrams: Likely included