New Rotax engine offers 15% more power

Rotax ACE 300 The Rotax ACE 300 features a displacement of 1.6 litres, supercharger with a 32-blade wheel and large intercooler. Credit: BRP

BRP’s new Rotax jet propulsion engine is designed to be 9% bigger than the company's next largest engine and create 15% more power.

Designed with a longer stroke compared to the Rotax 4-TEC 250, the Rotax ACE (Advanced Combustion Efficiency) 300 has a displacement of 1.6 litres and increased efficiency in friction reduction and cooling.

“We are so excited to be launching the most powerful engine that the market has seen,” said Michael Carter, director of North American business development for jet propulsion systems.

Supercharger

Available on Scarab jet boat models and Chaparral Vortex models, the engine also includes a re-designed supercharger with a faster spinning 32-blade wheel (double the blades of the previous version). This produces 30% more intake boost and requires no maintenance.

A new larger intercooler provides a denser air charge, aids in increased airflow and features a new air fin design for improved heat transfer. New ignition curves have been developed to efficiently match the increased air boost with the output of the larger fuel injectors, leading to the 15% increase in horsepower.

Plasma coating

A new protective plasma coating on engine cylinder liners creates a metallic layer that provides a hard and durable surface to withstand piston friction forces, improves surface durability and produces better heat transfer and superior performance. A reengineered cooling system includes an additional heat exchanger and a larger, more efficient, engine oil cooler.

Other features include a closed loop cooling, lateral thrust control and intelligent neutral and reverse functionality to deliver controlled deceleration when shifting to reverse while underway.

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