Ultimate BoatingCox Marine CXO300

Ultimate Boating aggregates and compares public technical data (manufacturer brochures and spec sheets) to help boaters objectively compare engines, propellers, systems and boats.

Independent: no display ads, no sponsored content, no paid rankings.

Privacy-first: self-hosted, cookieless visitor analytics (Matomo), no third-party trackers, no cookie banner.

The site is funded by affiliate commissions (Amazon, Click&Boat): this does not affect prices or comparisons.

Published by RDI (Sébastien Sauteraud), Romans-sur-Isère (France).

Powered by rdiconnect.tech

Contact us

Cox Marine

Cox Marine CXO300: specifications

The Cox Marine CXO300 is an outboard rated at 300 hp with V8 (eight-cylinder V) architecture.

Head to head with its direct rivals ↓

The essentials

Ahead in this comparison

  • Dry weight393 kgrival: 430 kg

Behind in this comparison

  • Alternator output100 Arival: 180 A

Key figures

Power
300hp
Dry weight
393kg
Displacement
4,400cm³
Alternator output
100A
Indicative price
n/a
Maximum warranty
5years

Sources and technical context

Document year: 2021.

Manufacturer's official documentation. The original document link has not yet been recorded for this page.

Notes and conditions (FR)

Manufacturer's notes (in French)

Technical specifications

Block & combustion

ArchitectureV8
Cylinders8
Cycle4-stroke
Displacement4,400 cm³
Bore × stroke84,0 × 98,5 mm
Compression ration/a
Max rpm3700-4000 rpm
Specific output68 hp/L
Fuel systemDiesel — injection directe common rail haute pression, bi-turbo
Min. fueln/a

Transmission & gearcase

Gear ratio1,23:1
Propeller configurationn/a
Counter-rotating dual propn/a
2-speed gearboxNo
Counter-rotating versionYes
Available shaftsn/a

Weight & footprint

Dry weight (transom load)393 kg (moteur nu, arbre standard)
Power-to-weight ratio0.76 hp/kg

Electrical charging

Alternator (max)100 A
Amps per horsepower0.33 A/hp

Control & integration

Digital throttle & shift (DBW)Yes
Controldbw
Steeringn/a
Power steeringYes
Docking joystickPartner
GPS position holdNo
Direct injectionYes
VTEC (variable timing)No

Cost & warranty

Public pricen/a
Cost per horsepowern/a
Base warranty5 years
Maximum warranty (conditional)5 years

Operation & compliance

Emissions standardEPA Tier 3 · IMO 2 · RCD 2

Head to head with its direct rivals

Prices, warranties and test conditions are not harmonised. They remain visible but do not determine strengths or rankings.

Side-by-side figures for the CXO300 against OXE Marine OXE300, on the criteria that drive the purchase.

CriterionCXO300OXE Marine OXE300
Power hp300300
Dry weight kg393430
Power / weight hp/kg0.760.7
Alternator output A100180
Base warranty years52

An index requires at least two criteria documented for every compared engine. “n/a” means the available data cannot assess this use; it is not a poor rating.

How we compare →

Comparable-power engines, all brands