
Finnish crossover boat specialist XO has settled on adding a 300hp diesel outboard engine to its EXPLR 9 luxury dayboat in an effort to offer its customers a more fuel-efficient option.
The boats will come with the choice of a Cox CXO300 4.4-litre twin-turbocharged V8 engine to hang off the transom to back up the model’s credentials as a rigid and durable platform with outstanding driving qualities.
“Offering reduced fuel consumption, extended maintenance intervals and the broadest range of approved fuels, the CXO300-powered EXPLR 9 is the perfect boat for adventure seekers looking to travel sustainably to all corners of the planet,” Cox Marine said in a statement announcing the new arrangement.

“Pre-rigged at the XO factory, the CXO300 equipment is configured to the XO EXPLR 9 – the 9.0-metre version of XO's premium weekend cruiser.
“This ensures an optimum finish to all touch points on the vessel, in every sense – from the ergonomically positioned, smooth engagement of the electric shift throttle to a perfectly balanced boat and steering system.
“This alignment means that the end user always experiences the best of both the CXO300 outboard and XO Boat.”
The deal was struck in the lead-up to Europe’s 2023-24 boating season, with the new engine option available worldwide.

XO Boats products are sold in Australia via The Adventure Boat Company.
The EXPLR 9 features a military-grade aluminium hull built around a full-beam cabin that protects the boat’s occupants from the weather, and a large bow lounge for when the conditions clear.
The boat is equipped with a bathroom and a dinette that converts into a bed.
Specifications
Model: Cox CXO300
Engine type: Four-stroke quad overhead cam, 32-valve
Cylinders: 60-deg V8
Fuel management: EFI, twin-turbo
Weight: 393kg
Displacement: 4400cc
Bore x stroke: 84mm x 98.5mm
Compression ratio: 16:1
Maximum output: 300hp @ 3500rpm
Operating range: 3700rpm – 4000rpm
Shaft length: 635mm (25-inch)/762mm (30-inch)/889mm (35-inch)
Alternator: 12V/100A
Trim method: Power trim/tilt
Gear ratio: 1.23:1/1.46:1
Recommended fuel: Diesel
Oil capacity: N/A
Counter-rotating: Yes
Servicing: Annually (or every 100 hours after first service)
Emissions rating: EPA 3-star
Warranty: N/A
Model: XO EXPLR 9
Length: 8.57m
Beam: 2.57m
Weight: 2400kg (hull only)
Draft: 0.94m (engine down)
Engines: 250hp (min)/400hp (max)
Fuel: 305L
Accommodations: 2
Passengers: 8