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BRP Marine Group releases its largest waterjet engine

The Rotax ACE 300 produces 15 percent more power than the next largest Rotax engine.

The Rotax ACE 300 produces 15 percent more power than the next largest Rotax engine.

BRP Marine Group unveiled its largest engine for waterjet propulsion, the Rotax ACE 300 (Advanced Combustion Efficiency). Available on Scarab and Chaparral Vortex jetboats, the Rotax ACE 300 is the most powerful engine in the small jetboat market, according to BRP.

The engine features a maintenance-free supercharger, closed-loop cooling, lateral thrust control, reduced intake noise, improved sound quality and an “intelligent” neutral and reverse system.

“Packed with functionality unique to Rotax systems and unparalleled power, the new Rotax ACE 300 is going to be a show-stopper,” Michael Carter, director of North American business and development for jet propulsion systems, said in a statement. We are looking forward to seeing the capabilities of the engine when matched with the style and performance of the Scarab and Chaparral Vortex platforms.”

The Rotax ACE 300 is 9 percent bigger and creates 15 percent more power than the next largest engine in the company’s line, the Rotax 4-TEC 250. The Rotax ACE 300 displaces 1.6 liters, and BRP said it increased efficiency in two critical areas, reduced friction and better cooling. A new protective plasma coating on the cylinder liners creates a metallic layer designed to better withstand piston-friction forces. A re-engineered cooling system includes an extra heat exchanger and larger oil cooler.

The redesigned supercharger has a faster-spinning, 32-blade wheel — double the blades of previous versions and with 30 percent more intake. A bigger blower necessitates a larger intercooler to create a more dense air charge, which provides increased air flow. New ignition curves match the increased air flow with the output of larger fuel injectors

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