Yamaha 115CETOL: Precision Engineered Outboard Propulsion The Yamaha 115CETOL is a robust, gasoline-fueled 2-stroke outboard engine designed for reliable marine propulsion in recreational and light commercial boating applications. Delivering 115 horsepower (84 kW) of crankshaft power, this 4-cylinder powerhouse excels in providing smooth, high-revving performance for versatile vessel operations. Key technical specifications underscore its engineering excellence. With a displacement of 1,730 cm³ (1.73 liters), the engine operates within an RPM range of 4,500 to 5,500, achieving peak output at 5,500 rpm for agile acceleration. Its 13:26 reduction ratio (approximately 1:2.08) optimizes torque transfer to the propeller, enhancing thrust efficiency. Weighing just 167 kg (368 lbs), the compact unit features a 20-inch (508 mm) shaft length, electric start system, and marine-grade aluminum alloys for corrosion resistance. The 2-stroke cycle design prioritizes a superior power-to-weight ratio, while the back-extract exhaust and cooling system manages thermal loads effectively. In marine environments, the 115CETOL shines with tailored benefits for durability and efficiency. Its corrosion-resistant materials and streamlined cowling withstand saltwater exposure and reduce hydrodynamic drag when trimmed, ensuring longevity in harsh conditions. The advanced cooling architecture prevents overheating during extended runs, promoting reliable operation in humid, saline waters. Performance-wise, this engine offers responsive low-end torque for quick planing and sustained high-speed cruising, with minimal vibration from the inline-4 configuration. Fuel efficiency is optimized for gasoline’s accessibility, though the 2-stroke nature suits speed-focused outings over ultra-economy voyages. Ideal for mid-sized recreational boats, fishing vessels, or tenders up to 20-25 feet, the Yamaha 115CETOL empowers boaters with dependable power, effortless handling, and enduring reliability—perfect for those seeking thrilling yet safe marine adventures. (248 words)