If you're new to boating or trying to figure out what kind of boat you want, the sheer number of possibilities available can be overwhelming. Sterndrive (inboard/outboard drive or I/O), inboard motors, and outboard motors are the three most popular forms of boat propulsion systems.
Each marine propulsion systems have different pros, which we will discuss briefly below.
#1. Inboard Propulsion Systems
The motors of boats with inboard propulsion systems are typically located at the centre of the hull. A propeller is connected to a driveshaft that travels from the motor to the outside of the boat. The process of generating and delivering power is quite similar to that of an automobile engine. Inboard boats are more accessible and less costly to maintain than outboards, have a lower centre of gravity for improved manoeuvrability, and have a cleaner stern.
#2. Outboard Propulsion Systems
The motor, gearbox, and propeller are all housed in a unit positioned externally at the back of the boat in outboard hybrid marine propulsion systems. These are by far the most frequent types of boat propulsion systems. Not only does the unit generate propulsion, but it also controls the steering.
In comparison to inboard and I/O boats, outboard propulsion systems are considerably more efficient. You can get better performance per horsepower. Because of the placement of the motor, outboard boat owners usually compliment how simple it is to maintain.
#3. Sterndrive or Inboard/Outboard (I/O) propulsion systems
An I/O boat has the drive unit, or outdrive, situated to the ship's back, with the motor located just front of the stern, or back of the boat, as the name suggests. The outdrive transfers engine power to the propeller. An outdrive's bottom half resembles the bottom half of an outboard engine.
Another factor to consider when buying an I/O boat is the type of water you'll be operating it in. If you intend to use your boat in saltwater, it's best to avoid I/O boats for various reasons.
Conclusion
Understanding the types of boat propulsion systems will help you identify which is best for your marine electrification needs and suitable for your usage.
Keep in mind what the different types of propulsion systems function best and their downsides when considering which diesel electric drive to choose.
