Yamaha 130BETOL Marine Engine: Precision Power for High-Performance Propulsion The Yamaha 130BETOL is a robust, gasoline-fueled marine engine engineered for reliable boat propulsion in demanding saltwater and freshwater environments. As a 2-stroke, 4-cylinder inboard/outboard unit, it delivers 130 horsepower (95 kW) of crankshaft power, making it a versatile choice for vessels requiring swift acceleration and sustained high-speed operation. Key technical specifications underscore its engineering excellence: a compact 1,730 cm³ (1.73 L) displacement optimizes power density, while an operating RPM range of 5,000–6,000 ensures responsive throttle response. Weighing just 167 kg (368 lbs), the engine features electric start for effortless ignition and a 13:26 (1:2) reduction ratio that steps down maximum engine RPM to approximately 3,000 at the propeller shaft, enhancing efficiency and component longevity. With a 508 mm (20-inch) shaft length, it integrates seamlessly into standard marine drivetrains, supporting direct or geared propeller linkages without additional drive systems. In marine applications, the 130BETOL excels through its superior power-to-weight ratio, providing exceptional thrust for planing hulls while minimizing overall vessel ballast. The 2-stroke cycle—likely with oil injection for lubrication—offers higher power output per liter compared to 4-stroke alternatives, coupled with fuel efficiency ideal for extended cruises. Electric starting mitigates manual cranking risks in rough seas, and the robust reduction gearing protects against torsional stresses, promoting durability in corrosive saltwater conditions. Performance-wise, this engine shines in high-RPM scenarios, enabling rapid planing and top speeds for agile maneuvering. Its balanced design reduces vibration and noise, enhancing operator comfort during prolonged outings. Ideal for speedboats, fishing skiffs, and mid-sized recreational craft, the Yamaha 130BETOL combines Yamaha’s renowned reliability with performance-oriented features, though users should verify emissions compliance for regulated waters. This engine empowers mariners to conquer the waves with confidence and precision. (Word count: 278)