- Inboard outboard vs outboard fuel economy pro#
- Inboard outboard vs outboard fuel economy trial#
- Inboard outboard vs outboard fuel economy plus#
At max speed the Cummins diesel burned 18.8 gallons per hour. One recent web search compared a Cummins/Mercruiser 320-hp diesel to a Crusader 320-hp gas engine. As to which is better in a given boat, it will depend on whether the hull is a planing hull, or a displacement or semi-displacement hull how it's loaded, and how fast it's typically run.
That's a $26,658 difference, or $53,316 in a twin-engine boat. That difference that could buy you a lot of gasoline! In general, diesel fuel has about 10 percent more energy potential per gallon than gasoline and, generally speaking, diesel engines are more efficient than gasoline engines. Compar e a 320-hp Yanmar Diesel at $38,245 and a Crusader 320-hp gasoline engine at $11,587. But then you have to consider the typically large upcharge for a diesel engine option.
Inboard outboard vs outboard fuel economy plus#
Th at’s a plus on the diesel side of the equation. So on average, diesel is $.47 per gallon cheaper than gasoline at this writing. 97 per gallon and diesel costing $2.50 per gallon. By averaging both diesel and gasoline fuel costs from 12 different sources I came up with marine gasoline averaging $2. In terms of basic maintenance chores like changing oil and filters, diesel and gasoline engines require about the same expense and effort. In some states, the gasoline available is of the non-ethanol variety, which many people, myself included, would regard as a major plus. In some places diesel fuel is less expensive per gallon than gasoline. There's no crystal-clear picture of what’s going on by state or ev en by region when comparing prices from one marina to another. What about fuel prices? As of March 2016, both gasoline and diesel prices have been plummeting and fluctuating for quite a while. Regarding sailboats, I haven’t seen a gasoline-fueled sailboat with an inboard engine since the late 1970s, so sailors will really never have to ponder this. You're trying to relax when you’re boating right? Extra noise won’t help. Excess noise on board when you're underway really detract s from the quality of your recreational experience. I can’t emphasize the significance of this enough.
Inboard outboard vs outboard fuel economy pro#
I use an app called dB Meter Pro and have found it quite useful and accurate. If you have a smartphone, you can perform sound checks and add relevant numbers to your test while underway.
Inboard outboard vs outboard fuel economy trial#
Again, I recommend a comparative sea trial and maybe even a decibel level sound check. Boatbuilders are sensitive to this increased onboard noise, and part of any diesel upcharge is going to include enhanced engine room soundproofing.
Diesel engines are noticeably noisier than their gasoline-fueled brethren. This also applies to another key concern: decibels. The proof is in the sea trial.Ī Crusader 5.7-liter gasoline engine with multi-port fuel injection. You can get really caught up in specifications. The best way to narrow this down is to try one of each version in sea trials and compare directly. The reality is that the actual performance differences from one engine package to another will vary based on the specific boat, engine torque, and horsepower curves for the engines and propeller choices. A test captain for Cobalt Boats recently described the difference between their gasoline-powered and diesel-powered engine offerings on their new Cobalt A-40 model : “The gasoline version of this boat certainly has adequate power to get it up on plane and running nicely, but the diesel version is much snappier, gets on plane more quickly, and just feels more responsive.” It’s safe to say that this experience is not unique to the new Cobalt. But, in the size range of about 35 to 45 feet there are still plenty of gasoline V-8 engines that can generate enough power to get these boats up and running. Once you get over about 45 feet, displacement weight really starts to dictate the power requirements, and diesels win out in terms of the torque and horsepower available to get these larger boats up and running. In the smaller boat sizes, price points are critical and extremely competitive. The reasoning behind this is pretty simple. Beyond about 45 feet, you’ll really only have one choice, and that will be diesel. But when you get into the bigger size ranges you'll often have choices. Smaller inboard or stern-drive power boats up to about 30 to 35 feet in length will typically only offer gas engine power. To begin, you’ll discover that powerboat builders will typically only offer choices of gas or diesel on boats in certain size range s. The new Jeanneau Leader 36 is offered with twin Volvo diesels in either 260 or 300 hp, or twin MerCruiser 5.7-liter 300-hp gasoline engines.
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