What is an Outboard Motor?Īn outboard motor is the most easily recognizable kind of propulsion system on a boat. Because it has some outboard components, it is called inboard/outboard. What are Inboard Outboard Motors or I/O Motors?Īn I/O motor or inboard/outboard is just another name for that sterndrive style of inboard engine. The rudders and steering are a separate mechanism and not connected to the propeller. If you have a true inboard then the engine will be centrally located in the boat and connected to the propeller. Most inboard motors are actually these I/O motors.
If it’s a sterndrive engine, then the engine itself is inside the boat but the steerable part of your motor will be mounted on the stern of the boat. Inboard motors have a driveshaft kind of like a car that connects to the propeller.
These inboard engines are a permanent fixture in the boat’s hull and need to be accessed from inside the boat as well should they ever need to be repaired or maintained. Inboard motors are also called sterndrives on occasion and, as the name suggests, they are found inside the boat rather than on the outside like an outboard. Let’s take a look at what makes them different and how each one works. Most people are familiar with one or the other (or both) and each kind has its own advantages and disadvantages as well as instances where they are more common or beneficial to you as a boater. Inboard and outboard motors are arguably the two most popular types of motors available on boats, though they are not the only ones.
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