GEAR | Cox diesel outboard successfully passes US EPA testing


Cox Powertrain’s 300hp (225kW) diesel outboard has successfully achieved EPA Tier 3 approval for commercial applications. As the CXO300 is a new design built for purpose, Cox had to work with the EPA to go through a rigorous testing process for an OEM engine.

Emissions regulations are constantly evolving so it was imperative that Cox designed a clean-burning engine to ensure its ability to meet current and evolving emission standards for the CXO300 to receive approval from the agency.

“We developed a diesel engine with a much lower carbon footprint than an equivalent gasoline outboard,” said Joel Reid, Global Sales Director. “So far, those who have joined us on sea trials have commented favourably how quiet, smooth and clean the engine is.”

Production of the CXO300 started in May at Cox’s UK-based headquarters in Shoreham-by-Sea and the first outboards destined for the US market are due to be shipped in June.

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Baird Maritime Gear Editor

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