No rudder is needed. An inboard is a marine propulsion system that is enclosed within the hull of the boat — it is usually connected to a propulsion screw by a driveshaft. The driveshaft goes from the transmission to a propeller outside of the boat. The boat is steered with a rudder when the steering wheel is turned by the captain. The propeller then pushes the water past the turned rudder and turns the boat. These are just a few examples, and as you can tell, there are plenty of pros and cons to each propulsion system.
Additionally, position fixing and joystick docking are a breeze. Pod drive systems tend to cost more and finding the appropriate technicians to maintain and repair such systems might be slightly more difficult than traditional propulsion systems depending on your location. Choosing between an outboard and a sterndrive engine is a common question for recreational boats, perhaps most commonly with bowriders.
While in the past, most bowriders came standard with a sterndrive engine, boat manufacturers today are giving most bowriders the option for outboard power. Outboards enable a more fishable transom and while you lose space on the back, you typically gain a more spacious cockpit for storage or seating. Aesthetically, many boaters like the clean lines of a sterndrive design with a sun pad and swim platform.
However, based on personal preference, some enjoy the look of the outboard motors. Performance - The power-to-weight ratio is an important component when analyzing the performance of outboard engines vs. With recent advances in outboard engine performance, horsepower can often be similar when comparing outboard engines with sterndrive engines.
Outboard engines win by a significant margin on the weight factor. Hence, the power-to-weight ratio of an outboard powered boat is going to be better than a sterndrive boat. Fuel Efficiency - Because outboards typically mean a lighter boat, this translates nicely into fuel efficiency - even while outboards tend to run at higher RPMs.
If the amount of fuel you burn while boating is important to you, then an outboard engine might be the best bet. Maintenance is definitely easier with an outboard as the self-contained unit is quite accessible.
Additionally, the sterndrive has more moving parts which tends to lead to more maintenance over time. If winterizing is relevant, winterizing is also more simple when dealing with outboards.
While performance, fuel efficiency and maintenance are important considerations, many boaters choose between the outboard engine and a sterndrive system simply based on planned use cases of the vessel. The below photo shows a family enjoying the swim platform on the sterndrive powered Cobalt R Talk to a trusted salesperson or broker about the specific uses you plan for your boat.
Fishing vs. These considerations will likely drive your decision more than anything, and in most cases, you can match a suitable outboard or sterndrive engine with appropriate levels of performance and cost. Boat engine technology continues to march forward. Not too dissimilar to the automotive sector, much of the innovation surrounds electric power and propulsion in boats. Torqeedo is a German company that specializes in alternative propulsion systems including electric outboards, electric inboards, electric pod drives and hybrids.
Volvo Penta, a world renowned brand, is developing hybrid solutions with electric-only modes. Volvo expects to see their technology commercially available by One boat is a shaft or V-drive, and the other is a twin sterndrive. Both boats have hours, and for arguments-sake need some maintenance. From our experience, we will consider the differences in maintenance considerations at years for both shaft-drive and sterndrive.
As you can see, the cost of repairing a sterndrive is predominately parts, but it also includes more labour, because every time you work on the transom the motor needs to be removed. All of these costs are NOT incorporating any engine work, slipping costs and days on the slipway, which can add up significantly as well.
These costs will vary depending on the boat design, as some vessels may require floors and seating to be removed to gain access. It will be cheaper to get all the work done at the same time, as opposed to bit-by-bit as you will have to pay for slipping each time.
On the other side of the argument, a shaft-drive boat will usually attract a higher price, but not always. Owning a single sterndrive can be much more acceptable cost-wise compared to a twin sterndrive, but it will still cost more than an equivalent shaft-drive. It is time to finally put this question to rest. While the first practical and commercially acceptable outboard motor was marketed by Ole Evinrude in , it was not intended to compete with inboard powered boats.
Their single cylinder only produced 1. In order to offer greater horsepower without running gear under the boat, the idea of coupling an inboard engine to the bottom end of an outboard style drive was introduced in by Charlie Strang while he was working for Carl Kiekhaefer of Mercury Marine. When Charlie walked away from the project Wynne was free to market it elsewhere.
He presented the details to Volvo and they introduced the first marine stern drive to the public in Kiekhaefer quickly acknowledged a missed opportunity and began to design one for Mercury in Outboard Marine Corporation followed suit.
The sterndrive trend had begun. Over time, we have seen lots of new propulsion ideas.
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