This is a 150 hp Yamaha 2-stroke outboard engine. This engine is oil injected, 25" shaft, and has power tilt and trim. Compression on this motor is strong at 120psi even. This engine is ideal for bay boats and center console fishing skiffs. This is a very strong running outboard that has low hours on it . These are very popular engines due to the fact that they have a very simple design and are extremely reliable. carbureted 150 hp Yamaha outboards are an inexpensive alternative to modern computerized outboards. Almost any outboard mechanic has familiarity with this model.