Help centre

Frequently Asked Questions

How do I book a service?View answer

Please contact your local Cox Representative to book your service.

Alternatively, you can download the Coxswain app to request a service directly.

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I have a service booked but I didn’t receive a confirmationView answer

A confirmation email will have been sent to your email address. If you did not receive an email, please get in touch with your local Cox Representative.

Alternatively, if you have the Coxswain app downloaded, you will be able to find details of your booking on the app.

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Where will my service take place?View answer

Once your service appointment is confirmed, your local Cox Representative will be in touch to advise you on where your vessel needs to go for the service to be carried out.

How can I find out when my service is due?View answer

To find out when your service is due, please contact your local Cox Representative. You may be asked for your engine running hours, which can be found on the Cox graphic display screen on your helm station.

How long does a service take?View answer

The length of your CXO300 service is dependent on the service interval and any additional work required. It is best to contact your local Cox Representative to determine how long your service will take to complete.

What happens during the service?View answer

Our maintenance schedule details exactly what happens on each service. You can obtain a copy of this from your local Cox Representative.

What happens after the service?View answer

Once your service is complete, you will receive a service report via email.

Details of the service, and a copy of the service report, is also available to view on the Coxswain app.

Find out more about the Coxswain app

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My service is overdue, what happens now?View answer

If your service is overdue, we strongly recommend you contact your local Cox Representative as soon as you can to get a service booked in.

It is important you adhere to the service schedule to ensure your outboard runs as smoothly as it should, and no implications are made to your standard warranty terms.

How do I book a demonstration?View answer

Our distributor network is supporting demonstrations worldwide. If you are interested, please register your interest here and your local Cox Representative will be in touch.

Where are Cox demo boats located?View answer

We have demonstration boats across the globe, whether you are based in the UK, Europe, the United States, Australia or elsewhere in the world, our distributors will be happy to take you out on a demonstration. If you are interested, you can request a demonstration.

I’d like a demonstration of the CXO300View answer

Great! Please register your interest. Once you have registered, your local distributor will be in touch to arrange a time and date for you to experience the CXO300 diesel outboard.

Where can I have a demonstration of the CXO300?View answer

We run demonstrations across the globe. Register your interest here and your local distributor will be in touch.

How long are demonstrations?View answer

Demonstrations run on average just under 1hr but can be longer on request.

Are the demonstrations run on-the-water?View answer

Yes, all our demonstrations are run on the water.

Do I need to bring my own life jacket?View answer

All personal safety equipment will be provided for you.

If the demonstration is cancelled due to weather conditions am I able to reschedule?View answer

Yes, the Cox Representative hosting your demonstration will be in touch to re-arrange.

Do I need to pay to have a demonstration?View answer

No, all our demonstrations are free. However, we do ask that you always book your demonstration in advance.

Where can I buy a CXO300?View answer

We recommend you get in touch with your local distributor to purchase the CXO300. We have an elite team of marine engine dealers located in over 100 territories across the globe. Find your local Cox Representative.

Where can I find the CXO300 specification?View answer

You can view the full technical specification of the CXO300 here.

Is the CXO300 compliant with Emission standards?View answer

The CXO300 has been put through a variety of intensive testing to meet emissions requirements and has achieved certification approval for EPA Tier 3, IMO Tier II and EU RCD II and Bodensee (BSO).

How much does the CXO300 weigh?View answer

The CXO300 weighs 393kg/866lbs. For further information, view our technical specification.

What kind of diesel is required to run the CXO300?View answer

The CXO300 has been validated and certified using diesel fuels complying with fuel standards EN 590 and ASTM D975 No.2-D. Operating fuels with properties outside of these standards may lead to unacceptable emissions levels, increased fuel consumption, accelerated outboard wear and outboard damage, which may invalidate your warranty.

What oil can be used to run the CXO300?View answer

For the Powerhead, we recommend using Shell Rotella T6 5W40 engine oil and Shell Rimula. The powerhead oil must be fully synthetic and comply to minimum Pl service classification of CI-4. – Min standard – fully synthetic API CI-4 / SAE 10W40 or 5W40.

For the transmission- we recommend using Shell Spirax S3 AX gear oil. The transmission oil must comply with the SAE 80W90 viscosity standard and API service classification GL-5. Please contact your local dealer for further oil specification.

What is the warranty of the CXO300?View answer

Cox Powertrain offer a market leading warranty for the CXO300.

For our recreational customers, your CXO300 comes with a standard warranty of 1500hrs of use /5 years (whichever comes first).

For our commercial customers, the CXO300 comes with a standard warranty of 1000hrs of use / 12 months (whichever comes first).

Commercial customers located in North America, Europe, Australia, New Zealand, South Korea, Singapore and Japan are eligible for an enhanced warranty of 1500hrs of use / 18 months (whichever comes first).

The warranty for COX products is subject to terms and conditions and exclusions, set out in the CXO300 Standard Warranty Policy.

What vessels are compatible with the CXO300?View answer

The CXO300 diesel outboard is compatible with a variety of different vessels. For further information on compatibility, we recommend you contact your local Cox Representative.

What variations is the CXO300 available in?View answer

As standard, the CXO300 comes in a black carbon fibre cowling, however we do offer the option of white carbon fibre cowling also.

We offer a range of leg lengths from 25″, 30″ and 35″, along with 2 gearbox ratios – 1.23 or 1.46. Please contact your local Cox Representative for further information.

Is the steering compatible with all standard consoles?View answer

We recommend using the Dometic Optimus EPS system which has been specifically validated by Cox Powertrain for the CXO300. However, the CXO300 has been designed to also be compatible with other existing industry standards. Your local Cox Representative will be able to advise you further.

What ignition system does the CXO300 use?View answer

The CXO300 operates with a keyless FOB ignition from CoastKey. Please contact your Cox Representative for further information on how this system works.

What is the cost of the CXO300?View answer

The cost of the CXO300 differs from country to country depending on the local tax bracket. We recommend you speak directly to your Cox Representative, who will be able to give you an accurate figure.

Find your Cox Representative

Who is Cox Powertrain?View answer

Cox is a privately owned, British company based in Shoreham, UK. Founded in 2007, Cox Powertrain has seen significant growth during this time, from starting out as an idea, through to successfully being recognised as a renowned OEM. Backed by an unusual amount of private investment of circa £120 million, Cox Powertrain were able to bring the concept of a highly powerful 300hp V8 diesel outboard engine to the market. To find out more about Cox Powertrain, visit the About us page.

Where is Cox Powertrain based?View answer

Cox Powertrain’s headquarters are based in Shoreham, UK. Find us

Where is the CXO300 built?View answer

The CXO300 outboard engine is built in our production facility at our headquarters in Shoreham-by-Sea.

How do I become a distributor or Cox Representative?View answer

If you are interested in becoming a Cox Representative, please contact us here.

I would like to apply for a job at CoxView answer

Great to hear! You can view our current vacancies on our careers page.

How do I know if my warranty is registered?View answer

Details of your warranty can be found on the Coxswain app. Alternatively, you can get in touch with your local Cox Representative who will be able to assist you. 

Find out more about the Coxswain app

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I have an issue with my outboard. What do I do?View answer

If you are experiencing an issue with your Cox outboard, please contact your local Cox Representative.

Alternatively, if you have the Coxswain app, you can request technical assistance via the app and a Cox technician will be in touch.

Find out more about the Coxswain app

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I have an issue with my rigging components. What do I do?View answer

If you are experiencing issues with your steering or rigging components, please get in touch with your local Cox Representative.

Alternatively, if you have the Coxswain app, you can request technical assistance via the app and a Cox Technician will be in touch.

Find out more about the Coxswain app

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I have an error code on my GDU. What do I do?View answer

If an error has appeared on your graphic display screen, please contact your local Cox Representative.

Alternatively, if you have the Coxswain app, you can request technical assistance via the app and a Cox technician will be in touch.

Find out more about the Coxswain app

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I need to order some spare parts. How do I do this?View answer

If you need to purchase some spare parts, such as filters, we recommend you speak with your local Cox Representative.

I have an issue with the CoastKey systemView answer

If you are experiencing issues with your Coast Key wireless ignition system, please contact your local Cox Representative.

Alternatively, if you have the Coxswain app, you can request technical assistance via the app and a Cox technician will be in touch.

Find out more about the Coxswain app

Download on iOS

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How can I find my local Cox Representative?View answer

You can find your local Cox Representative here

Where can I find my Owner’s documentation?View answer

All owner documentation, including standard warranty terms, owner’s manual and help guides, are accessible via the Coxswain app.

If you do not have copies of these, please get in touch with your local Cox Representative.

Find out more about the Coxswain app

Download on iOS

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