When selecting an engine to power your vessel, conventional wisdom often leads us to focus on engine horsepower (hp) as a primary indicator of boat speed. This approach holds true for gasoline engines and applications with minimal payloads, like motorcycles or cars. However, the dynamics change dramatically when it comes to waterborne vessels.

Vessels face substantial resistance from the water they displace, necessitating a unique perspective on engine performance. This is where the issue arises with gasoline engines, which typically exhibit low torque. Consequently, to access 30% power from a gasoline outbaord, you often find yourself revving up the engine to circa 60% of its capacity. In fact, it’s common to experience a noticeable increase in engine power only when you surpass the 70% mark on the throttle.

This predicament becomes even more pronounced when dealing with heavier vessels, where the engine may struggle to exceed 70% to 90% of its maximum rpm due to a lack of torque. Consequently, what you believed to be a 90hp outboard engine may effectively deliver only 65hp in real-world applications.

So, the pivotal question arises: Is horsepower (hp) or torque more crucial for your needs? The answer lies in your specific application, but for many professionals who must transport equipment and crew throughout long workdays, torque often takes precedence. It serves as the initial factor to consider, followed by a careful examination of propeller speed to ensure you attain the desired top-end velocity.

While most gasoline outboard manufacturers keep torque curve data closely guarded, providing limited access to this vital information, we take a different approach. At our innovative UK-based engine manufacturing company, we provide transparent access to torque and power curves for the Dtorque engine on our website, empowering you with the knowledge needed to make informed decisions for your marine endeavors.