The Century Arabian has a similar aft engine compartment & engine configuration as well as being of similar length & beam of a Donzi 18. I also have several hundred hours seat time in my late younger cousin Bobby's early yellow fiberglass Century Arabian speedboat which had a V-Drive/ reverse mounted Chrysler 426 Hemi coupled to a Borg Warner Velvet Drive silent morse-chain tucked under engine V-Drive. I now own a straight inboard Big Block Chevy American Skier Super Eagle 24' skiboat which I love ! The I/O propeller angle is much more efficient & thus faster for the same basic engine horsepower.Ī single straight inboard, or V-Drive, won't reverse steer worth a darn as it will always pull hard to one side directon in reverse (transom walk) no matter the rudder's steering angle due to reverse prop torque steer & the reverse thrust water hitting the bottom of the hull on one side.īut I have owned several V-Drive Chris~Craft Lancers & literaly a dozen++ + straight "Old School" Mahogany woody conventional single inboard drive speedboats over my lifetime. This helped a bit~~~but realistically how long can you really make the propshaft in a Donzi 16 or 18 ?Īn I/O prop pushes basically at a very low angle almost straight aft, and can be trimmed buy moving the transom unit's fixed drive angle pin, or hydraulic trim cylinders. Old time boat racers used very long propshafts to decrease the under boat shaft & prop angle. The inefficient fixed shaft & propeller angle of 11*-15*, along with the long shaft, big rudder, and shaft strut also results in increased drag, and is one cause of the lower speeds for V-DrIves, & straight conventional inboards. If you would like to learn more about the benefits of outboard motors vs inboard motors for saltwater boats, or if you would like to learn about any of our marine services, please contact Bridgeview Marine at the location nearest you or by filling out a contact form on our website.I know my post may open up a "Can of Worms" among V-Drive Donzi owners.īut in my experience with conventional shaft inboards, V-Drives, & I/O powered boats I know that the I/O drive boat will be quite a bit faster with the same horsepower, and steer much better at slower running & docking speeds. Inboard motors will typically last longer without needing repairs, but the repairs are more difficult to conduct and saltwater will accelerate the need for repairs. This is typically easier to do for outboard motors. Saltwater is highly corrosive, meaning that the motor will need to be flushed after each use with freshwater. When it comes to choosing a motor type for saltwater, the difficulties that you will encounter are similar for the two motors, but these issues are typically easier to deal with on outboard motors. How Does Saltwater Affect the Different Types of Motors? The initial price tag and ongoing maintenance for an inboard motor is typically much higher than it is for outboards and, if something breaks, the boat will need to be docked until it is fixed, whereas an outboard motor can simply be replaced. Since inboard motors are built into the structure of the boat, which means that they are more difficult to work on and clean when necessary.
These benefits mean that boats with inboard motors are better for entertaining and sport. Inboard motors are integrated into the boat’s infrastructure and the motor itself is typically positioned below deck or under a box, meaning that they are less intrusive, quieter, more fuel efficient, and capable of putting out more horsepower and torque than outboard motors. They also are not always as simple to drive as inboard motors and they tend to create more wake. Outboard motors can also easily be raised and lowered which makes them more capable of traversing shallow waters.īecause outboard motors are detachable, they tend to be a bit bulky and can often get in the way. Outboards are reasonably inexpensive, and you can frequently find them second-hand. Upgrading the engine to gain some horsepower is extremely easy, meaning that your boat will always be customizable. They are easy to access, mount, and remove, making maintenance and cleaning extremely simple. Outboard motors are a great default choice for most boats. The motor that you should use will depend on the type and purpose of the boat being used and personal priorities. There are a variety of reasons to go with both outboard and inboard motors, and neither type of motor is inherently better than the other. The Benefits of Outboard vs Inboard Motors At Bridgeview Marine, we supply all kinds of boats and motors for sale, and we can help you to come to a decision on what kind of boating setup is best for you. When choosing a boat to use in coastal waters, one of the biggest questions that needs to be answered before a purchase can be made is whether it is better to go with outboard motors or inboard motors for saltwater boats.
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