🏷️ Basic Information Identification Make: Yamaha Model: 15ELD Outboard Year: 1990 Generation: N/A 📋 Manual Details Documentation Manual Type: Service Repair Maintenance Manual Language: English Format: PDF Availability: Downloadable Features: Step-by-step procedures, Exploded diagrams, Bookmarked, Searchable ⚙️ Engine Specifications Powerplant Engine Type: 2-stroke Displacement: 212 cc (12.9 cu. in.) Bore X Stroke: 56 mm x 43 mm (2.20 in x 1.69 in) Cylinder Configuration: In-line 2-Cylinder Compression Ratio: 7.5:1 Ignition System: CDI (Capacitor Discharge Ignition) Fuel System: Carburetor Spark Plug Gap: 0.7 - 0.8 mm (0.028 - 0.031 in) 🔧 Transmission Drivetrain Type: Outboard Motor Gear Ratio: 2.15:1 (13:6) Gear Selection: Forward - Neutral - Reverse 🔧 Maintenance Servicing Recommended Fuel: Unleaded gasoline (87 octane or higher) Recommended Oil Type: Yamalube 2-stroke oil or equivalent TC-W3 certified oil Oil Fuel Mixture Ratio: 50:1 (100 ml oil per 5 liters of gasoline) Gear Case Oil Type: Yamaha Marine Gear Oil (or equivalent SAE 80W-90 hypoid gear oil) Gear Case Oil Capacity: Approx. 130 ml (4.4 fl oz)