🏷️ Basic Information Identification Make: Yamaha Model: 150ETLJ Year: 1986 Generation: First Generation (pre-1987 models) 📋 Manual Details Document Properties Manual Type: Service Repair Maintenance Manual Manual Level: Professional Language: English Format: PDF Features: Step-by-step procedures, exploded diagrams, bookmarked, searchable ⚙️ Engine Specifications Engine Configuration Engine Type: 2-stroke Cylinders: Inline 4-cylinder Displacement Displacement: 1540 cc (94 cubic inches) Power Output Horsepower: 150 HP Full Throttle Rpm Range: 4500 - 5500 RPM Fuel And Ignition Fuel Induction: Carbureted Ignition System: CDI (Capacitor Discharge Ignition) 🔧 Transmission Gear Selection Type: Outboard Lower Unit Gear Ratios: Refer to specific gear case model within manual Drive: Shaft Drive 📐 Dimensions Physical Attributes Shaft Length: L (Long Shaft) 🔧 Maintenance Lubrication Gearcase Oil Capacity: Refer to manual for exact amount (typically around 700-800 ml) Recommended Gearcase Oil: Yamaha Outboard Gear Oil or equivalent API GL-4 SAE 80 Scheduled Maintenance Spark Plug Replacement Interval: Recommended annually or every 100 hours, whichever comes first Water Pump Impeller Replacement Interval: Recommended every 2 years or as needed based on condition Fuel Filter Replacement Interval: Recommended annually or as needed