2024 Cox CXO350 launched
Cox’s diesel outboard engine range steps up to 350hpDiesel outboard engine maker Cox has released a new version of its V8-based 300hp bread-and-butter model with a better turbocharger and an extra 50hp of performance.
The new 350hp engine is based on the same twin-turbo 4.4-litre block but includes an increased turbocharger capacity along with “other alterations” over and above the now entry-level engine, and will power ever higher-displacement recreational and commercial boats.
The 350hp engine is the same one that helped Cox set a new outright speed record for a diesel outboard-engined boat in October last year.
The new version of the alloy block V8 also produces its peak torque at 2600rpm, but instead of torque stretching to 959Nm, the 350hp version produces 1052Nm.
In terms of fuel use, the extra 50hp of the 350hp outboard engine carries a small penalty, rising to around 87 litres an hour compared with around 72 litres an hour under similar conditions for the 300hp version.
The new engine also uses the same 1.46:1 gear ratio as the less powerful version.
Cox is offering the same five-year/1500-hour recreational warranty on the 350hp as for the 300hp engine.
Despite the engineering tweaks, Cox claims the more powerful engine weighs the same as the 300hp one.
The electronic shift and throttle engine is also fitted with Dometic's fly-by-wire steering making it compatible with autopilot systems and the Optimus 360 joystick controller.
The 350hp Cox diesel uses six standard bolt holes with 762mm spacings between engines when mounted side-by-side on the transom.
Rival diesel outboard engine maker OXE also plans on releasing a new model later this year. However, OXE's new engine will produce up to 450hp and use a hybrid electric system that boosts low-end torque, improving low-speed performance.
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