Engineering efforts to electrify boat-propulsion systems took a sizable step in late November when ePropulsion announced an X Series of outboard engines.

The X Series includes the X12, X20 and X40, all of which are part of what company CEO Danny Tao calls “an intelligent and integrated platform” that boaters and boatbuilders can use to achieve a quieter, cleaner boating experience.

This series of engines is far from the first one that ePropulsion has produced since the company was founded in 2012. Its product range includes inboard and outboard electric motors, along with a pod-drive motor and a motor for standup paddleboards.

But the X Series is the most powerful version of an electric outboard that ePropulsion has produced to date, with its Spirit and Navy Evo models maxing out at 6 kW (equivalent to about 8 horsepower). Tom Watson, president of ePropulsion USA, said the X Series provides “incredible power.” The motors have a reported total powertrain efficiency of 88.2%. The X12 has 12-kW power, while the X20 generates 20 kW of power and the X40 delivers 40 kW of power (equivalent to almost 54 horsepower).

The research and development team at ePropulsion created an algorithm for X Series propellers, using more than 20 metrics to optimize hydrodynamic performance. The X Series also has frequency resonance isolation and vibration dampening technology, which should mean less vibration than aboard boats with comparable, traditional outboard engines.

According to ePropulsion, the X Series models also can weigh 36 percent less than traditional motors. The design places electric steering, power trim/tilt, an electric control unit and the controller within a single assembly, simplifying installation and minimizing intrusions into onboard space.

Also part of the X Series is ePropulsion’s Smart System Architecture, or eSSA. It is designed to allow for simple system configuration while supporting the integration of renewable energy systems.

And, speaking of evolving technology, the X Series has a digital helm and smart throttles that provide instantaneous feedback. The team at ePropulsion says this setup “opens the door to advanced driving assistance systems that improve safety and redefine aquatic navigation.” Features include position hold, heading hold and 360 motions to make maneuvering easier for skippers at the helm.

The ePropulsion Connectivity Service lets boaters access real-time boat and system status with monitoring, reporting and tracking.

How long will the X40 hold up? It’s built to the IP67 waterproof standard with projections of a 5,000-hour minimum service life, according to ePropulsion.

Take the next step: head over to epropulsion.com

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If you live in a climate where the temperature drops below freezing, winterizing your outboard engine is critical. In fact, a failure to winterize followed by a blast of frosty weather can cause significant damage, leaving you with a fat repair bill come spring. Fortunately, winterizing an outboard isn’t very complex and most do-it-yourselfers can get the job done in an afternoon. In fact, we can break it down into a series of four easy steps:

1. Flush the motor
2. Change the oil
3. Fog the motor
4. Stabilize the fuel

Flushing an Outboard Motor

We certainly hope you’re familiar with this process, because flushing with clean fresh water after each and every trip is one of the best ways to extend your outboard engine’s lifespan. All modern outboards have a flushing port threaded to fit a common garden hose, which allows you to flush the engine without starting it up. Find the port (look in your owner’s manual if it isn’t obvious), spin on the hose, turn on the water, and let it flow for at least five minutes. If you have an old model engine without a flushing port, you can place a set of earmuffs over the water intakes, turn on the water, then start the engine and run it until it’s thoroughly flushed out.

Changing the Oil

In a modern four-stroke outboard, you’ll have two oil changes to perform: the powerhead oil and the lower unit oil. Two-strokes don’t have powerhead oil, but will still need a lower unit oil change. To change the lower unit oil, you need to remove the top and bottom drain screws and catch all the old oil in a pan, for recycling later. Be sure the engine is tilted slightly up to angle the lower unit downwards, so all the oil drains out. After it is fully drained, use a lower-unit oil pump to pump fresh oil into the lower unit. When oil begins seeping out of the top hole, it’s full. Replace the top screw first, then remove the oil-pump fitting and quickly replace the lower screw before oil has a chance to seep out.

Changing the powerhead oil is very similar to changing the oil in an automobile; there will be a dipstick for measuring oil level, a drain for catching the old oil in a pan, an upper port for adding new oil with a funnel, and of course, a filter that needs to be replaced. If the locations for these aren’t obvious when you remove the cowl, refer to your engine’s owner’s manual. It’s also a good idea to check that manual ahead of time so you know what type of oil to use and how much you’ll need to replace.

Why change the oil now, as part of the winterization process? Oils have acid buildups that are created as the engine is run, and when that outboard is going to sit for an extended time it’s best to make sure the oil is fresh. Changing the oil now also offers a chance to be sure that there’s no water contamination (it will look milky), which could lead to freeze-damage when the temperatures drop.

Fogging an Outboard Motor

With older outboards, fogging was a rather painstaking process where you had to spray fluid into the carburetor and cylinders. Good news, folks: most of the outboards out there today have EFI fuel-delivery systems rather than those old carburetors. And in most cases, you can fog the motor by adding fogging fluid to a portable fuel tank, removing the fuel line at the filter and placing it in the portable tank, then running the fuel/fogging oil mix through the engine. Be sure to follow your owner’s manual recommendations and the instructions on the fogging oil to get the right ratio for the fuel and oil mix.

Note that if you use your outboard throughout the winter at least once a month, there’s no need for fogging it. In fact, many boaters skip fogging altogether and simply make sure they run the outboard up to operating temperature at least once every three to four weeks.

Stabilizing the Fuel

With today’s ethanol fuel, it’s very important to add a fuel stabilizer when your boat will sit for extended periods of time. First, fill the tank so there isn’t a lot of open space where condensation might form, then add the stabilizer directly into the fuel tank in the amount as per the manufacturer’s instructions.

What about antifreeze? With an outboard, it’s completely unnecessary just as long as you remember to store the engine in the tilted-down position. Outboards are designed to drain completely when tilted down, so water damage won’t be any issue. That said, it’s a good idea to tilt the engine up and down a couple of times and watch for any water coming out to make sure it’s completely drained. Then you can disconnect the battery and put it on a trickle-charger for the winter, address winterizing the boat itself, securely cover the boat , and then kick back and wait for the return of warmer weather and another boating season.

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At the Fort Lauderdale International Boat Show in October, ePropulsion premiered its X40 Electric Outboard.

ePropulsion says the X40 weighs 20 percent less than traditional motors while generating 40 kW of power, with 88.2 percent total powertrain efficiency. The design integrates electric steering, power trim and tilt, an electric control unit and a motor controller into a single unit.

The X40’s electric steering system eliminates the need for hydraulic components, and its built-in Connectivity Service offers real-time status, advanced monitoring, and reporting- and trip-tracking. Frequency resonance isolation and vibration-dampening technology are also part of the X40, for what ePropulsion says is less vibration than comparable outboards.

“We are always looking to innovate, not just to match what is available for standard internal combustion outboards but to move beyond their capabilities and provide real, enhanced performance while also providing a quiet, clean and powerful alternative for propulsion,” Danny Tao, CEO and co-founder of ePropulsion, stated in a press release.

How is the X40 built for the marine environment? It is reportedly IP67 waterproof with a minimum service life of 5,000 hours.

Take the next step: Go to epropulsion.com

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Mercury Marine, a division of Brunswick, has introduced the Avator 20e and 35e electric propulsion systems. The new models join the lineup next to the Avator 7.5e outboard, which was unveiled in January.

The company says it expects to debut two more electric-outboard products in the coming months, as well.

Mercury Marine says the Avator 20e and 35e have many of the same features as the 7.5e, including transverse flux motor technology, a full-color intuitive display and an ambidextrous tiller handle. The new models offer more power and the ability to connect multiple Avator batteries to extend range and run time, plus full access to the Mercury Marine app with the integrated SmartCraft Connect module.

The Avator 20e and 35e outboards generate 2200W and 3700W of power, respectively, at the propeller shaft. The 20e can produce acceleration that’s similar to a 5 hp FourStroke outboard, while the 35e generates acceleration that is comparable to a Mercury 9.9 hp FourStroke outboard.

These engines are intended for small vessels such as tenders, and are offered with tiller or remote steering.

Are the Avator 20e and 35e outboards available for purchase now? Yes, they went on the market in late August.

Take the next step: Go to mercurymarine.com/avator

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Mercury is the first major manufacturer of marine internal-combustion engines to offer an electric outboard option. The Avator 7.5e delivers comparable performance metrics to Mercury’s time-tested 3.5 hp four-stroke gasoline engine, minus the locally emitted carbon dioxide. The Avator 7.5e is also the only outboard currently on the market with a transverse flux motor, a design that Andrew Przybyl, Mercury’s technical manager and engineer for the Avator line, says has high-torque-density characteristics. The Avator 7.5e comes with a 1 kilowatt-hour lithium-ion battery that nests inside the outboard’s flip-top cowl, and a color display with GPS that gives operators a wealth of real-time range information.

“One of the biggest challenges we had was setting up the overall architecture of the outboard,” Przybyl says. The solution involved auditioning different concepts and designs, and then choosing the right supporting technologies, including batteries, motor types and overall configurations. “In electrification, overall system efficiency is the name of the game,” he says. “The other aspect was sustainability. This outboard is highly recyclable.” Creating a recyclable design, Przybyl says, involved using componentry from nontraditional materials. “Sustainability is an important part of our culture,” Przybyl says.

While the Avator 7.5e is intended for use aboard smaller boats, Mercury plans to release the bigger Avator 20e and 35e outboards later this year. All three of these electric motors will employ similar architecture, displays and companion apps.

Charge and Go

The Mercury Marine Avator 7.5e can run for 60 minutes at full throttle off a charged-up 1 kilowatt-hour battery, or for as long as 2.8 hours at 75  percent throttle (or 6.2 hours at 50 percent throttle, or 19.4 hours at 25 percent throttle). Users can also change out batteries in seconds.

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Mercury Racing has introduced the Mercury Racing V8 500R outboard, which the company says it created “for no-compromise owners of the fastest luxury sport boats.”

Stuart Halley, Mercury Racing general manager, stated in a press release: “Capable of delivering more than 500 horsepower in a wide range of conditions and weighing as little as 720 pounds, the 500R establishes a new benchmark for outboard power density. This motor offers incredible mid-range punch and pulls with unrelenting authority all the way to wide-open throttle. This is the most exciting production outboard to ever emerge from the Mercury Racing shop.”

The 500R has more than 500 eager horsepower, which is 50 more horsepower plus 10 percent higher torque than the 450R model. Its 4.6-liter, 64-degree, V8 FourStroke powerhead is boosted by a Mercury Racing supercharger. The engine is designed to perform on pump fuel with a minimum 89-octane (95 RON) rating.

Also on the 500R are upgraded component designs in the powerhead, cooling system, midsection and steering system. A new, 5.9-inch diameter gearcase, available in R-Drive and R-Drive Sport configurations, transfers the power to the water.

What lengths are available for the Mercury Racing 500R? It can be ordered at 20 inches, 25 inches, 30 inches or 35 inches for single- or multi-engine applications.

Take the next step: go to mercuryracing.com

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Sea Ray has launched another model in its SLX Series: The SLX 280 Outboard, powered by twin Mercury 250 Verado engines.

“Last year, we introduced the SLX 260, which received accolades for design and innovation,” Keith Yunger, Sea Ray president, stated in a press release. “Our latest model maintains the sleek styling and premium features found on the 260, but with more space and additional amenities that help boaters enjoy a day on the water.”

Length overall is 31 feet, 5 inches. Features include a cockpit sole compartment for gear, along with upgrades for a drawer-style cockpit fridge, a dry-storage compartment and an end table with an inductive charging station.

An optional Power Tower can be electrically raised or lowered with an extendable sunshade, and can be ordered with a Fusion Signature Series package.

What other tech is on board? Joystick piloting, Dual Digital Dash with 9-inch Simrad touchscreen displays, Active Trim, CZone digital switching and more.

Take the next step: visit searay.com

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Back in 2018, Mercury Marine thrilled boaters with the introduction of its V-6 and V-8 outboard engines, the result of the largest new-product development program in the company’s nearly 80-year history.

Now, the brand is adding the marine industry’s first V-10 outboard to its offerings. This Verado engine is available in 350 hp or 400 hp. It’s a 5.7-liter design that is compatible with Mercury SmartCraft technology. It also can be ordered with an optional dual-mode 48-volt/12-volt alternator to pair with Navico Group’s Fathom e-power system, an integrated lithium-ion auxiliary power management setup that lets boaters eliminate an onboard generator.

“They are powerful, smooth and quiet,” Chris Drees, president of Mercury Marine, said when introducing the V-10 Verado outboards. “They have many of the same fuel-efficiency-enhancing features that are synonymous with our high-horsepower lineup. They also deliver the same kind of premium boating experience that has made Verado outboards legendary.”

The company says it expects the V-10s to become a popular choice with owners of larger saltwater center-consoles, freshwater fishing boats that have single-engine setups, pontoon boats and smaller center-consoles. Each engine reportedly weighs 695 pounds and has the same 26-inch mount spacing as Mercury V-8 outboards, which means the V-10 is compatible with current boat designs. In addition, the V-10s are designed with multi-engine use or repowering in mind.

According to Mercury Marine, the new engines include the outboard industry’s first V-10 naturally aspirated powerhead. It uses 5.7-liter displacement and a quad-cam design to improve speed and acceleration. A 150-amp alternator is also part of the design and is intended to charge onboard batteries quickly while  supporting the boat’s electrical system.

Also part of the V-10 design is a new hydrodynamic gear case and a new Revolution X propeller. Mercury Marine says the larger diameter and wider blades on the prop, combined with the deep ratio of the gear case, result in better handling and acceleration, and in high efficiency from low speed to wide-open throttle. Advanced Range Optimization is part of the package, as is Adaptive Speed Control, which maintains engine rpm despite changes in load or conditions. That means boaters climbing large swells should have an easier time.

The V-10 Verados will also be compatible with a Mercury electric steering system for multi-outboard vessels that is expected to start shipping this month.

“We challenged our engineers to improve acceleration and overall performance with the new V-10 Verado outboards while also making them quieter and lighter than competitors’ outboards in this horsepower range,” said Tim Reid, Mercury Marine vice president of product development and engineering. “Once again, they exceeded expectations.”

Investing in the Future

Creating new engines like this V-10 outboard, and then bringing those products to consumers in a safe and reliable way, is neither cheap nor easy. That’s why Mercury Marine has invested heavily in research and development for quite some time now. Since 2008, the company has invested $2 billion on that front, including expanding its manufacturing footprint to more than 3 million square feet. 

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Mercury Racing is celebrating its 50-year milestone with events planned throughout the year to commemorate the anniversary.

A kickoff event was held at the Miami International Boat Show, with the introduction of the Mercury Racing V10 400R outboard and the Ventera performance propeller.

“For a half-century, the organization known today as Mercury Racing has been at the forefront of marine high performance,” Stuart Halley, Mercury Racing general manager, stated in a press release. “One constant has been the unwavering dedication of our employees, dealers and suppliers, and our boatbuilder partners, racers and customers who have always pushed us to lead the race and to lead the industry.”

The Mercury Marine Hi-Performance Products Department was established in 1973. It evolved to include outboard, sterndrive and performance products for racers and performance pleasure boaters alike.

Where’s the big party? In honor of the 50-year celebration, Mercury Racing is planning a Mercury Racing Midwest Challenge festival of powerboat racing in Sheboygan, Wisconsin, from August 11-13.

Where to learn more: go to mercuryracing.com

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Scout Boats unveiled its biggest boat yet at the 2023 Miami International Boat Show: the Scout 67’ LX Series, dubbed Project Everest.

The South Carolina-based boatbuilder’s 67-foot, outboard-powered flagship is a sportfishing yacht that comes in three variations: the 670 LXF (luxury fish model), the 670 LXS (luxury sport model) and the 670 LXC (luxury cruiser model). The primary difference between each version is what’s overhead. On the fish version, there’s a flybridge; on the sport version, there’s a hardtop; and the upper station is pushed forward on the cruiser version.

The 67 LX measures 66 feet, 9 inches, length overall, with a 16-foot beam. Powered with five 600 hp Mercury V-12 outboards, Scout projects the top speed to be about 52 knots, with a 434-nautical-mile range at a 35-knot cruise speed. Fuel capacity is 1,500 gallons. Scout says there are no plans to build the 67’ LX Series with inboard power.

The helm is to starboard, and four steps lead belowdecks to an entertainment/theater room. The forepeak master stateroom with en suite head is accessed via double sliding doors that open at the push of a button.

Scout partnered with superyacht design studio Harrison Eidsgaard for Project Everest. Each 670 LX yacht will be built in carbon fiber epoxy, with construction expected to start in the third quarter of 2023. Scout says Hull No. 1 is expected to debut at the 2024 Miami Boat Show, and full production is scheduled to begin in the second quarter of 2024.

“People look at outboard-powered boats as being trailerable boats ‘cause an outboard-powered boat has typically always been trailerable boats. … People think of a center-console being a utility or fishing boat that has a console in the center,” Scout Boats CEO Steve Potts said at the Miami Show. “I believe that we as designers and builders of these boats have to design and build things that reach people’s imagination. And it’s time for us to develop things that are reaching people’s imagination.”

What is the base price of a Scout 67’ LX Series yacht? $5 million.

Take the next step: scoutboats.com

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