Boat motors are engines designed to propel boats through water. They come in various types, including outboard motors, which are mounted on the transom, and inboard motors, which are installed inside the boat's hull. These motors can be powered by gasoline, diesel, or electricity, depending on the boat's design and intended use. The size and power of a boat motor are measured in horsepower (HP), which affects the boat's speed and performance. Choosing the right motor involves considering factors like the boat's weight, size, and the type of water it will navigate, whether it's lakes, rivers, or ocean.