🏷️ Basic Information Identification Make: Yamaha Model: 4 LD Outboard Year: 1990 Generation: Not Applicable (Outboard Motor) 📋 Manual Details Documentation Manual Type: Service Repair Maintenance Manual Language: English Format: PDF Download Features Searchable: Yes Bookmarked: Yes Content Diagrams: Exploded diagrams included Procedure Format: Step-by-step ⚙️ Engine Specifications Configuration Engine Type: Outboard Motor Cylinder Count: Likely 1 or 2 cylinders (specific data not in description) Cycle: Likely 2-stroke (common for 1990 outboards of this size, not explicit in description) Performance Horsepower: Not explicitly stated, but '4 LD' often refers to horsepower, so likely 4 HP. (Requires verification) Displacement: Not explicitly stated in description (typical for manuals to detail this) 🔧 Transmission Drive Type: Outboard Gearcase (Forward, Neutral, Reverse) Gear Ratios Gear Ratios: Not explicitly stated in description (covered in manual) 📐 Dimensions Physical Shaft Length: Not explicitly stated in description (common variable for outboards) 🔧 Maintenance Routine Recommended Oil Type: Not explicitly stated in description (detailed in manual) Oil Capacity: Not explicitly stated in description (detailed in manual) Intervals Service Interval: Detailed within the manual (e.g., spark plug replacement, gear oil change) Troubleshooting Coverage: Comprehensive troubleshooting included Repair Procedures Disassembly: Comprehensive step-by-step Assembly: Comprehensive step-by-step Inspection Coverage: Comprehensive inspection procedures