Engines – Boating Mag https://www.boatingmag.com Boating, with its heavy emphasis on boat reviews and DIY maintenance, is the most trusted source of boating information on the web. Thu, 06 Mar 2025 18:46:02 +0000 en-US hourly 1 https://wordpress.org/?v=6.4.2 https://www.boatingmag.com/uploads/2021/08/favicon-btg.png Engines – Boating Mag https://www.boatingmag.com 32 32 Single vs. Twin Outboards https://www.boatingmag.com/single-vs-twin-outboards/ Thu, 06 Mar 2025 16:36:04 +0000 https://www.boatingmag.com/?p=78638 Should you power with single or twin outboards? We pit a single 300 outboard against twin 150s aboard a 24-foot Contender.

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Contender 24S on the water
The Contender 24S is a versatile boat, well-suited for this comparison. Courtesy Contender Boats

Contender Boats is known for tournament sport-fishing boats, but the company describes its 24S center-console as “a great day-tripping boat” that fishes well but also serves families and divers. After several sea trials on the upper and lower Chesapeake Bay, we certainly agree. On those tests, we explored a common question: Should you power your boat with single or twin outboards? Read on to see what we found.

We tested two Contender 24S boats—one with a single Yamaha F300, the other with twin Yamaha F150s.  Both offered top speeds in the low 50s and efficient cruising speeds of 30 to 40 mph (3,500 to 4,500 rpm), yet the twins’ performance stood in stark contrast to the single. As expected, the weight of the twins planted the 24S’s 22.5-degree transom deadrise deep-V hull firmly in the water at all speeds and accelerated that boat to 30 mph, which was  slightly faster than the single, presumably because of the greater surface area of two propellers versus one. Their lift also caused them to run slightly flatter at high speeds. Despite the weight of the two engines, this Contender’s well-designed cockpit still self-bailed ­effectively with twins as the scuppers remained above the waterline. Nonetheless, we think the single was the hands-down winner for several reasons.

Two Yamaha outboards
There are multiple factors to take into account when choosing between single and twin outboards. Courtesy Yamaha Motor Corporation

The weight difference between the two boats is around 500 pounds. This shows up clearly in the performance charts shown on the opposite page. First, the single-engine boat is ­faster at every rpm stage. The ­single rose onto plane at a lower rpm range (2,500 to 3,000 rpm), despite the lift from the twin ­propellers. ­Second, the single was significantly more fuel-­efficient, ­topping out at a remarkable 3.9 mpg versus 2.7 mpg for the twins at 3,500 rpm. Twin engines require twice as much rigging and maintenance as a single, and they take up more room on the ­transom’s dive platform. ­Finally, the twin-150 rig costs $23,499 more than the single 300 (retail base price $157,210 versus $133,711). Note also that the twin-engine boat would not plane with a single 150, even with the crew all the way up at the bow to help balance it. (The boat will likely do so with one of the optional twin 200s.) Rather than buying twins for get-home redundancy, an annual ­towing-service ­membership might serve many boaters. To me, Contender’s 24S is a great boat for a big estuary like the Chesapeake or for near-coastal work, say up to 25 miles offshore.

While the 24S shows its pure Contender fishing genes, it also offers a head in the console (5 feet, 7 inches of headroom) and seating ranging from U-shaped forward seats to transom jump seats. It’s family-friendly enough to take some kids ­bottomfishing, serve ­Saturday ­race-committee work for a yacht club, or join friends at a sandbar. The 300 hp outboard is plenty powerful for casual tow sports. There’s a lot of storage space, much of it dry, plus coolers. A couple could cruise the 24S along the coast and its rivers with a little attention to Airbnbs and waterside restaurants. It’s built like a tank—solid enough to be heirloom quality for multiple generations of a ­water-loving family.

Read Next: Sterndrive vs. Outboard

Contender with twin outboards
Twin engines offer get-home redundancy, but there are other considerations. Courtesy Contender Boats

One criticism: Its fuel tank, at 130 gallons, seems large for the single-engine version; range at 3,500 rpm works out to 456 miles. While few boaters complain about too much fuel capacity, I’d guess that most people choosing the 24S wouldn’t run more than 100 miles per day, so an 85- to 90-gallon capacity seems more appropriate (range about 230 miles) to avoid wasted space or carrying an extra 330 pounds of dead weight (55 gallons of fuel). For twins, or a single 350 or 400, one might want the extra 55 gallons. That’s my opinion, as someone who would run 40 miles one way in it on occasion. Yours can differ, certainly.

So, as the only “Sport” model in Contender’s line, the 24S seems underrated, deserving of more attention for coastal folks who aren’t interested in hardcore blue water. Yes, as a semicustom builder, Contender can build sport ­features such as forward seating into larger models, but this boat seems to fit neatly into a widespread coastal niche where it fishes ably but also shows off its well-honed versatility.

Contender 24S single outboard performance data
Contender 24S Single 300 HP Yamaha V-6 Outboard Certified Test Results Boating Magazine

How We Tested

  • Single Engine: Single 300 hp Yamaha V-6 outboard
  • Drive/Prop: Outboard/15.5″x 17″ Saltwater Series II 3-blade stainless steel
  • Gear Ratio: 1.75:1 Fuel Load: 75 gal. Crew Weight: 380 lb.
Contender 24S twin outboards performance data
Contender 24S Twin 150 HP Yamaha I-4 Outboards Certified Test Results Boating Magazine

How We Tested

  • Twin Engines: Twin 150 hp Yamaha I-4 outboards
  • Drive/Props: Outboard/13.75″x 19″ Reliance 3-blade stainless steel
  • Gear Ratio: 2:1 Fuel Load: 40 gal. Crew Weight: 380 lb.

Contender 24S Specs

LOA:24’6″
Beam:8’6″
Draft:2’0″
Weight:5,000 lb. (dry)
Transom ­Deadrise:22.5 degrees
Fuel Capacity:130 gal.
Water Capacity:15 gal.
Waste Capacity:10 gal. (optional)
Max Horsepower:400
Available Power:Yamaha outboards in single or twin configurations

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Must-See Engines at the Miami International Boat Show https://www.boatingmag.com/boats/must-see-engines-at-the-2025-miami-international-boat-show/ Thu, 13 Feb 2025 16:02:47 +0000 https://www.boatingmag.com/?p=96448 In the market for a new engine? This year's Miami Boat Show is packed with options.

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When it comes to marine power, the Miami International Boat Show is stacked with outboards, inboards, diesels, jets, electric engines and more, both on display and in the water. Here are five highlights to check out.

Suzuki DF 200 V6 and Inline 4
Suzuki DF 200 V6 and Inline 4 Courtesy Suzuki Marine

Suzuki DF 200 V6 and Inline 4

Suzuki has its entire lineup on display at the Convention Center, as well as several opportunities for onwater demos at the Venetian Marina. Take note of Suzuki’s versatility in offering both and inline 4 and V6 version of its 200 hp outboards. Depending on how you operate your boat, one might be the best choice for you. Stay tuned for a full head-to-head evaluation in our April issue, and catch up on the inline 4, here.

Honda outboards lineup
Honda 200, 225 and 250 Outboards Courtesy Honda Marine

Honda Revamps Its Lineup

Honda Marine announced advancements and improvements in its outboard lineup from 115hp up to its V6 250. This lineup will be available with Honda’s Intelligent Shift and Throttle (IST) steering, and feature an exterior makeover resembling its recently released v8 350. Look for Honda both in the Convention Center and in the water at the marina. Read about the Honda’s flagship V8 350, here.

Mercury Marine Joystick Control for Single-Engine Outboards
Mercury Marine Joystick Control for Single-Engine Outboards Courtesy Mercury Marine

Mercury Marine Joystick Control for Single-Engine Outboards

Joystick Piloting for Single-Engine Outboards with Thruster enables vessel control capabilities not possible in a traditional single-engine application, including 360-degree rotation of the vessel and sideways movement. It also supports a suite of integrated SmartCraft® advanced controls previously not available for single-engine vessels. These include Skyhook (locked position and heading), Bowhook (locked position) and Drifthook (locked heading) digital anchoring to maintain position regardless of wind or current or heading, a major enhancement for anglers or when waiting for a drawbridge to open or fuel dock access.

Volvo Penta Twin FWD Drive
Volvo Penta Twin FWD Drive Courtesy Volvo Penta

Volvo Penta Twin FWD Drive

Volvo Penta’s FWD drive system revolutionized the ability of recreational boats to double as surf boats thanks to its forward facing propeller design. Now, with the Twin FWD system this technology is available for boats up to 38 feet. We had a chance to run and see this system up close on a Cobalt R33 Surf.

Yamaha XTO 450
Yamaha XTO 450 Courtesy Yamaha

Yamaha XTO 450

Yamaha has several of its outboards on display at the show, led by its largest engine, the XTO 450 (read about it here). The XTO 450 is designed for big-boat applications to get you safely to the canyons and back.

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Mercury Racing 150R and 200R Outboards https://www.boatingmag.com/boats/mercury-racing-150r-and-200r-outboards/ Thu, 06 Feb 2025 14:00:00 +0000 https://www.boatingmag.com/?p=95678 The new Mercury Racing 150R and 200R outboards should well please boaters seeking high performance for a variety of craft.

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Mercury Racing 150R and 200R outboard
Mercury Racing’s new 150R and 200R outboards are available in Phantom Black and optional Cold White Fusion. Courtesy Mercury Racing

Mercury Racing debuted the 3.4-liter V-6 150R and 200R outboards, providing boaters ­who seek high-performance outboards with lighter weight and array of performance-oriented choices in things such as gear-case type, gear ratio, and other advancements not available with other ­outboard engines in this range.

The Mercury Racing 150R and 200R outboards made their debut at that 2024 Cannes Yachting Festival, in France, September 2024, to great acclaim. Prioritizing torque, the design of each ­delivers exceptional hole shot and acceleration without the weight of a V-8, according to Mercury Racing. Transient Spark Technology electronically adjusts ­ignition timing as needed, producing ­additional torque for faster hole shot and acceleration. At full throttle, the 150R develops up to 6,000 rpm, while the 200R tops out at 6,400 rpm.

For comparison, a look at ­Mercury Marine’s ProXS outboards helps showcase why these new Mercury Racing offerings will prove important for high-performance applications.

For example, the ProXS 150 displaces 3.0 liters and is an ­inline-four configuration, weighing 456 pounds, compared with the 150R’s 475 pounds (remember, it’s a V-6 displacing 3.4 liters). The ProXS 150 comes with a 2.08-to-1 gear ratio, while the 150R offers a higher 1.85-to-1 ratio, which is better optimized for speed in many situations. The gear cases of each offer water pickups on the nose cone, enabling operation at higher mounting levels, use with a jack plate, or simply at higher trim levels, all off which translate into higher speed. Both are available in 20- and 25-inch shaft lengths, and both offer counter-rotation at the 25-inch shaft length. The V-6 150R provides an 85-amp alternator, compared with the inline-four ProXS 150, which offers a 60-amp alternator.

Looking at the 200 hp power level, we see that the 4.6-liter V-8 ProXS 200 weighs in at 505 pounds, while the Mercury Racing 200R weighs in at a lighter 469 pounds. The ProXS 200 comes with a 1.75-to-1 ratio and either the big, rugged 5.4-inch gear case, or the Torque Master gear case for elevated-mounting height applications. The new Mercury Racing 200R, however, offers different gear-case choices, both with a 1.75-to-1 ratio.

Note that all weights given r­epresent the lightest version of each engine.

The Mercury Racing 200R with a Torque Master gear case proves ideal for heavier boats capable of reaching up to 85 mph. It features a heavy-duty 19-spline stainless-steel prop shaft and is designed to run partially ­surfaced to propel heavier tournament bass and multispecies fishing boats with maximum speed and control. For boats capable of speeds greater than 85 mph, the surface-piercing design of the Sport Master gear case features low-water pickups and a crescent leading edge to maximize efficiency and speed. The available cambered skeg counteracts prop torque on single-engine installations for improved performance and handling.

The Mercury Racing 200R is available in a 20-inch shaft length, and the ProXS 200 is available in 20- and 25-inch shaft lengths, and with counter-rotation in 25-inch. 

The Mercury Racing 150R makes a maximum wide-open throttle rpm of 6,000 and can run on 87-octane fuel. The Pro XS 150 also makes 6,000 rpm at WOT and can also run on regular gas. The 200R makes up to 6,400 rpm, while the ProXS 200 makes up to 6,200 rpm, and both can run on regular gasoline. The warranty is three years limited for all four of these engines.

“With the new 150R and 200R, we are bringing Mercury Racing DNA to our V-6 outboard range. When it comes to bottom-end torque, these engines are best-in-class,” says Jeff Broman, category director at Mercury Racing. “Add the many digital features provided by Mercury’s V-6 platform, and the competition cannot match them.”

Read Next: Mercury Racing 500R Outboard

The digital features Broman references include digital throttle and shift, which gives drivers precise, seamless engine control. Fuel economy also is optimized through built-in GPS-enabled features such as Mercury’s ­Active Trim, Adaptive Speed Control, and Advanced Range Optimization, which delivers precise fueling throughout the ­operating range. These features have been described in depth, and more information about each can be found at boatingmag​.com, mercurymarine.com, and ­mercuryracing.com.

Pricing for these outboards depends upon the version ­selected. The 150R ranges between $18,975 and $21,065. The 200R ranges from $22,550 to $26,950.  

These new Mercury Racing outboards should well please boaters seeking high performance. It’s notable that in the current era of powerboating, high-performance and other boating categories,  such as fishing and dayboating, often merge. Boat owners now often seek a higher level of performance to go along with a trophy catch, and thrilling one’s guests with an ­extra turn of speed often proves as ­desired as enjoying a sunset. For these reasons, we expect to see ­Mercury Racing’s 150R and 200R outboards powering a ­variety of craft. Look for our test ­coming soon.

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The Differences Between Radial, Axial and Transverse Flux Motors https://www.boatingmag.com/boats/differences-between-radial-axial-and-transverse-flux-motors/ Mon, 06 Jan 2025 14:00:00 +0000 https://www.boatingmag.com/?p=95642 Electric outboards continue to evolve, and as more choices become available it's important to understand the differences.

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Axial flux motor
Axial flux motors are just one type available in electric outboards. Courtesy EVOA

Axial flux? Transverse flux? What do these terms mean? Why do they matter? What is flux, anyway? Here’s a vocabulary primer for electric marine propulsion.

Radial Flux Motor

To visualize a radial flux motor, think of two iron cylinders. One is fitted with magnets set around its outside and an axle running through its center (the rotor). Surrounding this cylinder is a larger one (the stator). Inside the stator cylinder is a series of ridges wound with copper wire. The wires are connected to a switch—the commutator—that alternately changes the current direction.

The alternating current created by the ­commutator induces magnetic fields around the stator’s windings. These alternating pulses oscillate between south and north at 60 cycles per second (aka hertz). This force—the flux—acts at right angles to the rotor’s permanent magnets, forcing it to turn. Because the pulses come so quickly, the rotor turns at full power immediately, providing the instant torque and acceleration for which electric vehicles are known.

While relatively bulky and heavy because of the metal yokes around their stators and rotors, radial flux motors are easy to manufacture and require minimal maintenance over long service lives. Torqeedo manufactures radial flux marine motors.

Read Next: Consistent Rating Standards Needed for Electric Motors

Acel electric outboard
Acel outboards use axial flux motors. Courtesy Acel Power

Axial Flux Motor

Next, imagine an ­electric motor with a flat disk of nonferrous material serving as the stator. Set around its perimeter are a dozen half-inch-high stubs wound with wire. As before, alternating current feeds the windings. Facing the stator (like stacked pancakes) is another 6-inch disk—the rotor—with its permanent magnets fastened around its perimeter. The oscillating magnetic poles of the stator react with the poles in the rotor’s permanent magnets, attracting and repulsing them. The flux force created causes the rotor and its shaft to turn, but notice that its flux acts in parallel—axial—with the axis of the shaft.

The lack of a yoke and locating the magnets away from the central axis result in higher power-to-weight ratios than equivalent  radial flux motors. The EVOA E1 and Acel outboards use axial flux motors.

Transverse Flux Motor

A transverse flux ­motor runs on more-­complex three-dimensional paths of magnetic flux. Instead of copper wire wound around stator ridges, their coils run circumferentially, at right angles to the axis of rotation. The 3D flow of magnetic flux occurs ­a­xially through the stator, radially through the air gap between them, and circumferentially through the rotor. The rotor has multiple permanent magnets axially in a ring around the motor’s shaft. The stator arrangement involves laminated U-shaped structures securing a ring-shaped coil around the motor.

Transverse flux motors are even more complicated than axial flux motors. There’s still only one moving part—the ­rotor—but more magnets, wire, and structures to hold them precisely in intricate ­positions. Transverse flux motors offer the highest torque and power density. Mercury Marine’s Avator outboards are transverse flux motors.

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Mercury Avator 110e Electric Outboard https://www.boatingmag.com/boats/mercury-avator-110e-electric-outboard/ Mon, 11 Nov 2024 14:00:00 +0000 https://www.boatingmag.com/?p=93913 The 110e is Mercury's largest electric outboard offered in the Avator lineup to date, and it's suitable for multiple roles.

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Mercury Avator 110e
The name 110e derives from the fact that the motor delivers 11,000 watts of power at the prop shaft. Courtesy Mercury Marine

Mercury recently celebrated the debut of two new Avator electric outboards: the 75e and the 110e. Both are made for small-boat applications, with the 75e delivering 10 hp at the prop shaft and the 110e delivering 15 hp at the prop shaft. We had the opportunity to run them at an event in Charleston, South Carolina. I spent the most time running the 110e, Mercury’s biggest electric outboard to date offered in the Avator lineup. For this test, Mercury had the 110e mounted on a Sun Tracker Party Barge 18 pontoon. Here’s how it went.

First off, the name 110e derives from the fact that the motor delivers 11,000 watts of power at the prop shaft, which roughly translates to 15 hp (at 746 watts per hp, that’s 14.75 hp precisely). As you’d expect, a 15 hp engine is not going to send an 18-foot ­pontoon rocketing around the lake. But you can see this application working for people boating on lakes that have horsepower limits or allow the use of only electric power, or for those who lack a need for speed, those with limited access to fuel, and, finally, those with a desire to avoid ­ethanol issues and winterization.

The dry weight of the 110e is 124 pounds, and it has a small, sleek profile reminiscent of a Star Wars droid. The 110e can connect to up to four 5,400 Wh lithium-ion batteries that weigh 93 pounds apiece. Our Sun Tracker came equipped with a pair of batteries housed ­under the transom bench seat, combined with the 5400 Power Center—the unit responsible for integrating the batteries with the outboard and the helm, and also for charging. Mercury says that when both batteries are drained, they take about 10 hours to fully charge using the integrated 1 kW charger on a 120-volt AC shore-­power hookup. Opting for the 520 W portable charger saves space on the installation but ups the recharge time to 20 hours.

Taking control at the helm with one other person aboard, the first thing I noticed was how responsive it was in ­close-quarters handling. There is almost no lag time from the throttle, and the 110e provides ample low-end torque, which really came in handy when fighting a strong current while backing out of the slip and trying to maneuver through traffic at the marina. Once clear, I punched the throttle and noticed instantaneous acceleration. That said, we could not break plane and motored along at displacement speeds, topping out at around 13 mph running down-current. At wide-open throttle, Mercury estimates about an hour of run time; range and run time prove progressively longer the more you ease up on the throttle. I spent most of my test run at around 7 to 8 mph and saw the range hover around 15 to 16 miles, or about two hours.

Read Next: Mercury Avator 20e and 35e Electric Outboards

Lithium batteries for Avator 110e
The Avator system for the 110e can work with up to four 93-pound 5,400 Wh lithium-ion batteries. Courtesy Mercury Marine

Range, speed and battery life are all easily accessible on the simple digital dash display at the helm, so you should never be surprised by a sudden lack of juice to get home. The 110e also proved remarkably quiet, so much so that without looking, I couldn’t tell that it was on while idling. Underway, I recorded 74 decibels at the helm at full throttle, but much of that was due to the wind and other ambient noise on the open pontoon platform.

The 110e is a great power option if you boat on electric-­only lakes or ones with strict speed limits. It’s also a ­no-brainer for tender duty—provided yours can handle, as well as fit, a 93-pound battery and rigging—because it will get you into shore and back to the marina. MSRP is $20,900, and you can learn more at mercurymarine.com.

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Must-See Engines at the Fort Lauderdale International Boat Show https://www.boatingmag.com/boats/must-see-engines-at-the-2024-fort-lauderdale-international-boat-show/ Wed, 30 Oct 2024 15:14:52 +0000 https://www.boatingmag.com/?p=94100 This year's show is packed with a number of amazing boat engines.

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Whether you’re looking at a new boat or looking to repower, the Fort Lauderdale International Boat Show is packed with excellent choices on display and in the water. Here are some of the highlights to check out.

Read Next: Must-See Marine Electronics at the Fort Lauderdale Boat Show

Mercury Racing 150R
Mercury Racing 150R Courtesy Mercury Racing

Mercury Racing 150R

The new 150R, as well as the 200R, are V6 engines designed to deliver exceptional hole shot and acceleration without the weight of a V8. Transient Spark Technology electronically adjusts ignition timing as needed, producing additional torque for faster hole shot and acceleration. At full throttle, the 150R develops up to 6000 RPM, while the 200R tops out at 6400 rpm. Read more here.

Where: Convention Center 2012; Bahia Mar 2055

Volvo Penta Twin FWD Drive
Volvo Penta Twin FWD Drive Courtesy Volvo Penta

Volvo Penta Twin FWD Drive

Volvo Penta’s FWD drive system revolutionized the ability of recreational boats to double as surf boats thanks to its forward facing propeller design. Now, with the Twin FWD system this technology is available for boats up to 38 feet. When combined with Volvo Penta’s Joystick Wakesurfing, it’s a system to help everyone catch waves.

Where: Bahia Mar 1203

Honda BF350
Honda BF350 Courtesy Honda Marine

Honda BF350

The BF350 [https://marine.honda.com/outboards/models/highpower/bf350]  is Honda’s largest outboard to date, a V8 with a newly developed 5-liter-­displacement block with a ­fully balanced, 60-degree offset crankshaft, built using the same alloy and strength specifications as the engine in the Acura NSX high-performance supercar, according to Honda. Read more about it here.

Where: Convention Center 1223

Suzuki Stealth Outboards
Suzuki Stealth Outboards Courtesy Suzuki Marine

Suzuki Stealth Outboards

Suzuki offers eight outboard models with its unique black matte finish that looks super cool on the water while still providing quiet, efficient and powerful performance. Read more here.

Where: Convention Center C39

Garmin and Minn Kota trolling motors
Garmin and Minn Kota Trolling Motors Courtesy Garmin and Minn Kota

Trolling Motors

You’re going to want to keep up with the latest in trolling motor technology with Garmin and Minn Kota. We have a full write-up online here.

These new trolling motors can up your fishing game tremendously.

Where: On several boats at the Bahia Mar and Convention Center

Yamaha XTO 450
Yamaha XTO 450 Courtesy Yamaha

Yamaha XTO 450

Yamaha has several of its outboards on display at the show, led by its largest engine, the XTO 450 (read about it here). The XTO 450 is designed for big-boat applications to get you safely to the canyons and back.

Where: Bahia Mar 1207, 2029

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Consistent Rating Standards Needed for Electric Motors https://www.boatingmag.com/boats/consistent-rating-standards-needed-for-electric-motors/ Thu, 26 Sep 2024 13:00:00 +0000 https://www.boatingmag.com/?p=93392 Power ratings and boat design are just some of the latest things to be considered in the world of electric motors.

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Boat with ePropulsion outboard
Efficient electric power is a partnership of motor and boat. Courtesy ePropulsion

Methods for measuring and reporting horsepower of electric outboards are debated within the industry. Trolling-motor makers such as Minn Kota, Lowrance, Garmin and Rhodan report the power of their motors in terms of input voltage and thrust in pounds. That’s long been the standard, and it allows fishermen to readily compare performance using these values.

But with an electric-motor system used as primary propulsion, the industry is still struggling to agree on a standard by which boaters can make informed purchasing ­decisions. For internal-combustion engines, the standard is to rate power at the prop shaft of an outboard or sterndrive. Inboard power ratings are measured at the output flange of the shaft coupling (shp) or at the flywheel, called brake horsepower (bhp). In these cases, a buyer can compare different engines using the same rating scheme.

Some electric-motor makers, such as Torqeedo, suggest that electric horsepower is a function of input voltage, losses to friction in the motor, and power of the prop to push a vessel forward. The latter attempts to measure horsepower using the actual force applied by the prop, among other factors. But what if you choose a different prop, such as one of several options Mercury offers on its ­Avatar motors? We’ll debate this question in the future.

While electric-horsepower reporting is still in ­industrywide flux, electric propulsion also brings a new dynamic to ­boatbuilding. Boats to be electrified have to carry heavy batteries. Vessels for electrification must have hull designs and ­operator expectations that do not include sustained maximum speed and long range—at least for the near future.

A vessel’s center of gravity is another piece of the puzzle. A properly placed CoG for a petroleum-fueled vessel can be easily misbalanced with heavier electric power. And there is a trick to it with petrol as well.

When fuel burns down, the boat weighs less, but does the CoG remain the same? To keep it as close as possible, the fuel tank should be balanced over the lateral and longitudinal centers of gravity. But many fuel tanks, especially on pontoons, are at the stern of the vessel. When electric power is consumed, the batteries remain the same weight, so the CoG does not change.

Read Next: Decoding the Horsepower Ratings of Electric Motors

Boat with Mercury Avatar electric outboard
Pontoons might be a prime existing candidate for electric power. Courtesy Mercury Marine

Ultimately, boatbuilders will need to rethink boat design and construction to optimize electric power. It is the same challenge that carmakers have. Tesla didn’t just replace internal-combustion powerplants with electric; it built a new car designed to perform ­specifically with electric power. Boatbuilders must either find boats best suited to electric or design new ones.

For example, Candela’s C-8 Polestar employs lighter-weight materials and ­hydrofoils to lift the vessel clear of the ­water at speed, reducing drag and increasing speed and power efficiency from dual electric motors.

Aluminum boats—fishing vessels, in particular—are suited to electric for inshore or lake fishing because they are light and because many anglers accept modest planing speeds of 20 mph or trolling speeds of 2 to 5 mph, and can make do with a shorter cruising range.

Pontoons might be a prime existing candidate for electric power. Many are at their best tooling along at 10 to 15 mph—right in the wheelhouse for many electric’s efficiency profile—and they have the buoyancy to carry heavy batteries.

Inflatables and RIBs are already popular choices for electric propulsion because of their light weight. Ultimately, ­however, a consistent standard for ­rating and comparing power is essential to this growing segment of the boating market.

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EVOA E1 Electric Outboard https://www.boatingmag.com/boats/evoa-e1-electric-outboard/ Mon, 23 Sep 2024 13:00:00 +0000 https://www.boatingmag.com/?p=93385 EVOA's E1 outboard is rated for 200 hp at the prop and delivers instant full-torque shot of an axial-flux electric motor.

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EVOA E1 electric outboard
The E1 is an electric powerplant that delivers 200 hp on the transom. Courtesy EVOA

EVOA’s new E1 outboard is rated for 200 hp at the prop, delivering instant full-torque hole shot of an axial-flux electric ­motor into a powerhead less than half the weight of a comparable four-stroke gas outboard. EVOA’s team of engineers and technicians has designed complete, integrated power systems with motors, drives, batteries, throttle, dash, and ­telematics for ­boatbuilders. ­Cooling ­systems are also available, ­including for salt ­water, as well as DC fast charging and Level 2 240-volt AC rapid ­charging.

EVOA’s E1 axial-flux motors come from its partnership with YASA, a wholly owned subsidiary of Mercedes-Benz. YASA motors powered a Drive eO PP03 high-performance automobile to win the Pike’s Peak International Hill Climb in 2015 and 2016, the first EV to do so outright. Rolls-Royce broke the world speed record for an ­all-electric flight with YASA ­motors in the Spirit of Innovation at 345.4 mph. Jaguar’s Vector V20E set an electric water-speed record in 2018. Other notable YASA applications include the Ferrari 296 GTB sports car and the Curtiss 1 Bike.

These are high-performance designs tested at maximum stress points. Using this groundbreaking technology, EVOA builds boating-performance solutions into its patented propulsion system. At 62 pounds, for 100 hp and 96 percent efficiency, the axial-flux motors are smaller and more powerful than anything seen before. The reduction in mass, while introducing equal amounts of torque, has been the heart of these achievements. The size and versatility of these motors allow EVOA to scale them to a boat buyer’s intended needs. With the ability to stack the motors along a shaft, the power request is progressive. EVOA can independently control the output of each, using the company’s proprietary Ecoflux software. With 800-volt architecture, the horsepower ranges are scalable from 100 to 600.

Read Next: Things to Consider When Repowering With Electric Motors

EVOA E1 internal components
Axial-flux motors are smaller and more powerful than anything seen before. Courtesy EVOA

Fortescue WAE (formally Williams Racing/WAE) has ­partnered to produce EVOA’s E1 battery packs. WAE has been at the forefront of EV innovation, with batteries that can hold energy density of 210 kWh/kg. WAE is a supplier of Formula E, LMDh, and Extreme E ­series batteries. EVOA ­customizes WAE/E1 packs to handle the ­waterproofing and impact-­resistant maritime demands of high-performance watersports, utilizing the same properties as the automotive-racing packs. This fall, WAE will begin building these 34.5 to 90 kWh packs for EVOA in Detroit. EVOA can connect them in banks ­ranging from 44 to 207 kWh.

The EVOA motor system can connect with any marine drive system simply by changing the mounting orientation. Without having to alter any fundamental properties, the E1 System can power conventional inboards, V-drives, and sterndrives, as well as the new outboards and a groundbreaking jet drive that the company will introduce at the IBEX Show from October 1 to 3. Current EVOA-powered production vessels include the 420 hp sterndrive, 133 kWh Launch 25GTe from Chris-Craft, and the 440 hp, 550-pound-feet torque 155 kWh Supra EV550 from Skier’s Choice. Field-­testing by the EVOA team indicates that for average watersports use, the Supra EV 550 offers around three hours’ runtime on a single charge—plenty for many boaters’ needs. For manufacturers, EVOA can assemble the drives on a custom basis for prototypes or on the assembly line. They stand ready to train technicians for partner boatbuilders, whether for pontoons, wakeboats, ­tenders or performance boats.

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Sharrow Props for Lower Horsepower Engines https://www.boatingmag.com/boats/sharrow-props-for-lower-horsepower-engines/ Tue, 17 Sep 2024 13:00:00 +0000 https://www.boatingmag.com/?p=93592 New Sharrow M-XA propellers are for 20- to 200-hp engines.

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Sharrow MX-A propeller
Sharrow’s MX-A is engineered for peak performance. Courtesy Sharrow Marine

Introducing the all-new Sharrow MX-A—a game-changing addition to the award-winning Sharrow MX series. This revolutionary propeller is engineered for peak performance, designed to fit 2-stroke, 4-stroke, command thrust, in-line 4-cylinder, and power thrust engines ranging from 40HP to 200HP. It’s compatible with the most popular outboard  brands, including Mercury, Yamaha, Honda, Suzuki, Tohatsu, Johnson, and Evinrude, pushing the boundaries of marine propulsion like never before.

Read Next: Sharrow Garners a Boating MPI Award

The Sharrow MX-A incorporates all the incredible benefits and patented technology of the Sharrow MX series, delivering enhanced efficiency, smoother operation, unmatched fuel savings, better docking, and improved command of your vessel. Every Sharrow MX-A is masterfully CNC-machined from a solid block of aircraft-grade aluminum, crafted with precision in the heart of Detroit City, embodying the pinnacle of American innovation and craftsmanship.

After your order is placed, the Sharrow team will reach out to verify your engine selection and select the perfect pitch Sharrow MX-A for your boat. New orders ship in 4-6 weeks, and every order comes with a 30-day satisfaction guarantee. 

Price ranges from 1,995.00-2,495.00 depending on your gearcase size. Select from the engine options at the URL below to choose the right model for your engine.

Ordering Information for Sharrow Props

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Mercury Racing Debuts New 150- and 200HP Models at 2024 Cannes Boat Show https://www.boatingmag.com/boats/mercury-racing-debuts-new-150-and-200-hp-models-at-2024-cannes-boat-show/ Wed, 11 Sep 2024 13:00:00 +0000 https://www.boatingmag.com/?p=93523 New color options for the 150hp FourStroke, and a new mid-range jet outboard engine were also introduced at the 2024 Cannes Yachting Festival.

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Mercury Racing 150R outboard
Mercury Racing’s new 150R outboard. It is a V6 engine. Courtesy Mercury Racing

Mercury Marine, a division of Brunswick Corporation and Mercury Racing launched two new Racing outboards on the opening day of the Cannes Yachting Festival. In addition, this week Mercury also announced new color options for the 150hp FourStroke, and introduced a new mid-range Jet outboard engine.

New Mercury Racing 150R/200R

During a media event at the boat show in Cannes, Mercury Racing announced the all-new 150R and 200R outboard engines, built on a V6 platform.

The new 150R and 200R are all about torque. Displacing 3.4 liters, these V6 outboard engines are designed to deliver exceptional hole shot and acceleration without the weight of a V8. Transient Spark Technology electronically adjusts ignition timing as needed, producing additional torque for faster hole shot and acceleration. At full throttle, the 150R develops up to 6000 RPM, while the 200R tops out at 6400 rpm.

These outboards come with the full suite of the Mercury Marine’s V6 platform features, including Digital Throttle & Shift (DTS), which gives drivers precise, seamless engine control. Fuel economy also is optimized through built-in, GPS-enabled features like Mercury’s Active Trim, Adaptive Speed Control, and Advanced Range Optimization, which delivers precise fueling throughout the operating range. Where other performance outboards require 89 octane fuel, the 150R and 200R are designed to operate on 87 octane, saving money at the pump.

The 150R and 200R also are equipped with a larger, 85-amp alternator, versus competitor engines’ 44- to 55-amp output. Mercury’s built-in battery management system ensures that even with a full suite of electronics on board, owners always have enough electrical power for their needs.

“With the new 150R and 200R, we are bringing Mercury Racing DNA to our V6 outboard range. When it comes to bottom-end torque, these engines are best-in-class,” said Jeff Broman, category director, Mercury Racing. “Add the many digital features provided by Mercury’s V6 platform, and the competition cannot match them.”

The 200R is offered with two different gearcase configurations. Weighing just 469 lbs., the 200R Torque Master is designed for competitive bass boats and other performance craft in the 80- to 85-mph range. The 200R Sport Master, at 489 lbs., is built for high performance boats running at speeds of 85 mph to well over 100 mph. The 150R is available with shaft lengths of 20 and 25 inches, while the 200R Torque Master and Sport Master have a 20-inch shaft.

“In recent years, Mercury Marine and Mercury Racing have raised the bar for innovation in the outboard engine market by introducing new V8 and V10 models at the top of our range. Now, we have responded to customer demand by expanding our V6 offerings. With the 150R and 200R, our customers have a wider range of high-tech, sophisticated outboards to choose from to power their boating adventures,” said John Buelow, president, Mercury Marine.

Read Next: Mercury Racing Unleashes New 60 APX Outboard at Dubai Boat Show

Mercury Racing 200R V6 outboard
The new Mercury Racing 200R V6 outboard. Courtesy Mercury Racing

New Mercury FourStroke 150hp Cold Fusion, Warm Fusion Color Options & All-New FourStroke 105hp Jet

Also announced this week, the Mercury 150hp FourStroke outboard is now available in Cold Fusion and Warm Fusion White in addition to Phantom Black. The new colors were added in response to demand from saltwater boaters who want to minimize the appearance of salt spray on their outboard and keep it cooler to the touch in the hot sun. In addition, this gives more owners the ability to coordinate their engine with their hull color.

Also expanding Mercury’s mid-range lineup is the all-new FourStroke 105hp Jet. This jet outboard engine, built on the FourStroke 150hp platform, delivers 105 horsepower. This puts it at the head of the Mercury jet family, which also includes the Jet 25-40hp and Jet 60-80hp. The new FourStroke 105hp Jet is the ideal solution for boaters and anglers who want to navigate safely in shallower water while still enjoying the intuitive operation and reliability of Mercury FourStroke technology.

About Mercury Marine

Headquartered in Fond du Lac, Wisconsin, Mercury Marine® is the world’s leading manufacturer of recreational marine propulsion engines. A division of Brunswick Corporation (NYSE: BC), Mercury provides engines, boats, services and parts for recreational, commercial and government marine applications. Mercury empowers boaters with products that are easy to use, extremely reliable and backed by the most dedicated customer support in the world. The company’s industry-leading brand portfolio includes Mercury outboard engines, Mercury MerCruiser® sterndrive and inboard packages, Mercury propellers, Mercury inflatable boats, Mercury SmartCraft® electronics, Land ‘N’ Sea marine parts distribution and Mercury and Quicksilver® parts and oils. More information is available at MercuryMarine.com.

About Mercury Racing

Based in Fond du Lac, Wis., Mercury Racing, a division of Mercury Marine, is a leading provider of high-performance marine propulsion systems for discriminating boaters worldwide, offering an exciting and fulfilling power boating experience on the water. Using leading-edge technology, Mercury Racing produces high-performance outboards, sterndrives, propellers, parts and accessories. Mercury Marine is a division of Brunswick Corp., the world’s largest manufacturer of recreational products, including pleasure boats and marine engines.

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