Why do outboard boat engines only give power in horsepower but never tell torque numbers like car engine specs do?

Question

Why do outboard boat engines only give power in horsepower but never tell torque numbers like car engine specs do?

In: Engineering

Answer 1

Water is a liquid. It’s nothing like the rigid road surface.

Torque measures force applied to the road surface. This is interesting for a car, as the road doesn’t move when you drive on it.

Force applied to the water, other than having a complex relationship to speed, isn’t as interesting because it tells you nothing about how much “push” you get because the water moves when you apply a force to it.