🏷️ Basic Information Identification Make: Yamaha Model: 70ETLF Year: 1989 Generation: First Generation (1980s/early 1990s) 📋 Manual Details Publication Manual Type: Service Repair Maintenance Factory Professional Manual Language: English Features Format: PDF Download Organization: Step-by-step procedures Content Scope: Comprehensive explanations of disassembly, repair, assembly, and inspection Visual Aids: Exploded diagrams before disassembly sections Searchability: Completely bookmarked and searchable ⚙️ Engine Specifications General Engine Type: 2-Stroke Configuration Cylinder Configuration: Inline 3-Cylinder Capacity Displacement: 1130 cc (69 cubic inches) Performance Power Output: 70 HP @ 5500 RPM Fuel System Carburetion: Triple Carburetors Cooling System Cooling Method: Water-Cooled 🔧 Transmission Gear Reduction Gear Ratio: 2.15:1 (Typical for this model) Operation Shift Controls: Forward, Neutral, Reverse 🔧 Maintenance Lubrication Gearcase Oil Capacity: Approximately 750ml (25.4 US fl oz) Recommended Gearcase Oil: Yamalube Gearcase Oil (or equivalent marine-grade gear oil) Ignition Spark Plug Gap: 0.8mm (0.031 inches) Recommended Spark Plug: NGK BR6HS-10 (or equivalent) Fuel System Fuel Type: Unleaded Gasoline Recommended Fuel Octane: 87 Octane (87 AKI) Oil Fuel Ratio: 50:1 (Pre-mix for 2-stroke) Cooling System Water Pump Impeller Replacement Interval: Every 2-3 years or 200 hours (whichever comes first)