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Young woman tests Stealth E40 electric marine motor.
Young woman tests Stealth E40 electric marine motor.

Developing the Stealth E40 Electric Outboard Motor

By Bill Moore

Electric Marine Propulsion founder Scott Masterson talks about developing this 24kW, 40hp electric boat motor capable of powering recreational fishing boats up to 17 feet at 20 mph.

This morning here in Omaha it's -1 degrees Fahrenheit. In Houston, Texas it's 27 degrees. That's -2.77 Celesius for those of you how prefer that number. For Omaha, that's cold, but we're sort of used to it. For Houston area resident Scott Masterson, that's really cold.

Still, equipped with his iPad tablet and Skype, he braved it to do an interview about his startup, Electric Marine Propulsion, developing and, hopefully, selling lots of electric outboard motors for small recreational water craft; in his case a 17 foot aluminum Jon Boat.

The motor, called the Stealth E40 because it's 24kW continuous power rating is equivalent to a 40 hp two-stroke piston-popper, isn't strictly a "conversion." It's based on a Yamaha outboard motor case, sans the ICE-age motor. As you'll see in the accompanying video, all the parts are brand new. Masterson substitutes an off-the-shelf electric motor, controller, and drive-by-wire throttle POT. Here's Scott's impromptu "show-n-tell" from the Lake Conroe boat yard north of the metro Houston area.

After showing off his motor, Scott moved to a sunnier location to talk more about his business and where he wants to take it going forward. That audio-only interview is posted below. He also sent along a link to a video of the motor in action on the lake.

Masterson's plan is to eventually sub-out production of the Stealth E40 to his casing manufacturer in China, but initially all early production units will be assembled in Texas. He sees his primary market as being competitive tournament fishermen. Along with selling the motor, he also sees an opportunity to sell accompanying battery packs based on repurposed electric car modules.

The price of the motor, he says, is competitive with that of the gasoline unit it's replacing, priced slightly higher, he estimates, but way quieter and cleaner to the air and the lake.

Times Article Viewed: 14554
Originally published: 16 Jan 2018

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