01243 432485
07702 842190

RYA Approved Training CentreMCA-training-approved
diesel engine hero

RYA Diesel Engine Course

 The main reason for RNLI lifeboat launches to leisure craft is engine failure and as for most things in life prevention is better than cure. As part of the diesel engine maintenance course, you will be taught:

  • The principles of diesel engine operation
  • How to identify and rectify the more common faults which can arise
  • The systems and parts of the engine
  • How to bleed the fuel system
  • How to change the impeller
  • Routine maintenance such as changing filters
  • Winter lay up procedures
  • Engine electrical systems
  • This one day course, which requires no previous experience is highly recommended to anyone who sails a yacht with an engine or who is a motor cruising enthusiast.

All equipment to complete the course will be provided. You just need to bring a notepad. Tea and coffee is provided and you can get lunch from the Village which is a short walk away. Alternatively you can bring a packed lunch to eat in the classroom.

1. The Principles of the Diesel Engine

2. The Four Stroke Cycle

The Induction Stroke
The Compression Stroke
The Power Stroke
The Exhaust Stroke
Intercooling / Aftercooling

3. The Fuel System

The Basic System
The Tank
Fuel Pre-Filter (Water Separating Filter)
Fuel Lift Pump
The Engine Fine Filter
Injection Pump
Bleeding the System

4. The Cooling System

Seawater Cooling
Freshwater Cooling
Temperature Cooling
The Thermostat
The Seawater Impeller Pump

5. The Air Systems

The Airway In
The Airway Out

6. Engine Electrical Systems

The Basic System
Battery Capacity and Care
Drive Belts
The Alternator

7. Check List

Basic Spares and Tools

8. Importance of Winterisation and Servicing

Engine Lubrication
Transmission Lubrication
Winterisation and Servicing
Service Schedule

9. Faultfinding


RYA Diesel Engine Course – FAQ’s

These are a few of the questions we get asked by people booking on the RYA Diesel Engine Course. If you have any further queries or are unsure whether this is the course for you please call us on 01243 432485 and we will be only too happy to chat to you.

What time does the course start and finish?

Typically we start at 9.00am and finish at about 5.30pm with an hour break for lunch

What do I need to bring?

You just need to bring a notepad with you and wear old clothes or overalls and if you have your own boat it may be useful to bring your engine manual so that the instructor can go through any engine specific queries.

Where is the course held?

It will be held at classroom 2 in Emsworth Yacht Harbour, Thorney Road, Emsworth, Hants PO10 8BP

What qualifications or experience do I need to complete the RYA Diesel Engine Course?

You do not need to have any qualifications or knowledge of diesel engines to attend this course.

Are there any exams?

There is no exam at the end of this course so just enjoy it without the worry of being tested at the end of the day.

What qualification will I get once I have completed the course

On successful completion of the course you will be issued with the RYA Diesel Engine Course Certificate.

How many people will there be on the course?

We have a maximum of 5 people on a course, so you will get lots of individual attention from the instructor.

Who is a typical RYA Diesel Engine Student?

It is difficult to say what a typical student looks like but we often find that students are:

  •  Boat owners who wish to be able to understand more about their engines and to be able to deal with the ,more common problems that arise.
  •  People who wish to be more useful crew members by gaining a greater understanding of boat systems.
  •  People who may be planning a career in the marine industry and wish to improve their overall knowledge.

What kind of engine do you use?

We use a marinised Yanmar engine during the training. This won’t necessarily be the engine you have on board so you are encouraged to bring along your own engine manual so that the instructor can go through any specific queries you may have.

How do I book?

Just click on the book now button



I just wanted to pass on my thanks to Les for the way he delivered yesterdays Diesel engine course. It was hugely informative and very hands on. He also included a host of additional practical tips which will be invaluable when I purchase my own yacht. 

David MacFarlane

Really enjoyed the course & Les was excellent & full of helpful personalised tips.

Thank you

David Chinn

I completely loved the Diesel Course today - Les is a really top teacher and I learnt so much!!!

I'll definitely be back for more training!

Fleur Whitlock

Just a quick note to say how much I enjoyed my course with Les on Friday, he really is excellent at his job. Being the only attendee of course had its advantages and I thank you for still running it on that basis.

I learnt so much and it certainly has given me the confidence to tackle any issue with my engine, especially if at sea.

Tony Lidgate

We wanted to let you know how excellent we thought the diesel engine maintenance course was on 23rd June. Les was a first rate teacher and taylored the course to suit our engines which was so helpful. He also gave us lots of useful tips related to the engine and some which were indirectly related. My cousin, David, said the course was much, much better than he was anticipating - 'Brilliant' was the adjective he used. My son, Tom thought it was extremely interesting - high praise from an 18yr old! Please could you relay our thanks and appreciation to Les. We have booked our ferry to go and sort out the engine sooner than planned and we are so glad we came on the course! 


I am sorry not to have sent a message straight away to let you know that I thought that the Diesel Engine Course was excellent. Les was very good, and patient with us. I learnt a lot, and now feel more confident. I have found the engine manual which was hiding on board my boat with a pile of other stuff, and in fact I have now found a box with most of the spares for the Volvo 55 that I might need. I will get all the other things, and then hopefully will have no problems on the sail round to the mediterranean in August.

Roger Vickers

The diesel course was absolutely fantastic, what a great instructor. I learnt so much about my engine.

Toby Norman

Just to let you know I really enjoyed the diesel engine course and Les was such a good teacher that the day flew past.

Sally Cholmondeley

Quick note to say many Thanks for an excellent course on Monday. I now can't wait to get my hands on my diesel engine and pull it apart....safe in the knowledge that I can put it back together again.
Les was excellent, please send him my best wishes.

Nick Child

Thank you for an excellent course on Saturday - Les was a superb instructor and I really learned a lot. I wish the course had lasted longer - there is so much to learn! Les was a fount of knowledge.


Just to say thank you for providing such a great Diesel Engine Course on Saturday. Les was fantastic, and made what at first seemed very daunting into a day of relaxed learning (the best kind). I think that it has prompted Felicity and I into thinking about doing some more RYA courses

Annabel Wilkins
RYA Diesel Engine Course - Dates
Saturday, 04 June

Friday, 17 June

Saturday, 09 July

Friday, 22 July

To book on a course please click the book now button on the right of the page or to discuss your requirements you can contact us seven days a week from 8.00a.m to 7.30pm on 01243 432485 or 07702 842190

Cost: £ 95

Next Course Dates

Saturday, 04 June

Friday, 17 June

Saturday, 09 July

Friday, 22 July

Emsworth School of Navigation

Emsworth Yacht Harbour
Thorney Road
PO10 8BP

01243 432485
07702 842190