🏷️ Basic Information Identification Make: Yamaha Model: 15ELD Year: 1990 Generation: Not Specified 📋 Manual Details General Manual Type: Service Repair Maintenance Manual Title: 1990 Yamaha 15ELD Outboards Service Repair Maintenance Factory Professional Manual Language: English Format: PDF Download Features Organization: Step-by-step format Searchability: Searchable Bookmarking: Completely bookmarked Diagrams: Exploded diagrams before disassembly sections Content Coverage: Comprehensive, covers everything about the motor ⚙️ Engine Specifications General Engine Type: Outboard Motor Power Output Horsepower: 15 HP Cylinder Configuration Cylinders: 2 Displacement Cubic Inches: 14.0 Cubic Centimeters: 227 Fuel System Carburetion: Single Carburetor Cooling System Cooling Method: Water-cooled Ignition System Ignition Type: CDI (Capacitor Discharge Ignition) 🔧 Transmission Gear Shifting Type: Forward, Neutral, Reverse Gear Ratio Ratio: 2.15:1 📐 Dimensions Shaft Length Long Shaft: 20 inches Weight Approximate Weight: 108 lbs (49 kg) 🔧 Maintenance Oil And Lubrication Gearcase Oil Capacity: Approximately 0.38 US quarts (0.36 liters) Recommended Gearcase Oil: Yamalube Gear Oil Fuel System Fuel Type: Unleaded gasoline Fuel Mixture: 50:1 (Gasoline to 2-stroke oil) Spark Plugs Recommended Spark Plug: NGK B7HS-10 or Champion BUHSP Cooling System Water Pump Impeller Replacement: Recommended every 2-3 years or as needed Engine Tune Up Timing: Refer to manual for specifications Idle Speed: Refer to manual for specifications