Inboard motors are engines installed inside a boat's hull, typically used for propulsion. They are connected to a propeller via a drive shaft, allowing the boat to move through water efficiently. Inboard motors are often favored for their power and stability, making them suitable for larger vessels and various water activities. These motors can run on gasoline or diesel fuel, providing options for different performance needs. Inboard motors are commonly found in yachts, fishing boats, and speedboats, offering advantages like better weight distribution and reduced noise compared to outboard motors, which are mounted externally.