Marine Four-Stroke Engine

Marine Four-Stroke Engine is a picture-led study guide to a medium-speed four-stroke V propulsion engine with a flexible coupling, multi-plate clutch, reduction gearbox and controllable pitch propeller. It is written for marine engineering students and officers preparing for UK MCA oral examinations: Engineer Officer of the Watch (EOOW), Second Engineer (Class 2) and Chief Engineer (Class 1).

Turn the engine in your hands. The interactive 3D model works completely offline. Drag to rotate, pinch to zoom, run the engine, change the propeller pitch, cut the casing away, watch the air, gas and oil flow, explode the parts and tap any part for its card.

WHAT IS INSIDE

3D Model: cutaway, running engine, controllable pitch, charge air, exhaust and lubricating oil flow, exploded view, guided tour, tap any part for its card.

How it Works: the story of the engine in twelve steps, each with a picture and a button to see it in 3D, plus the key figures of a typical installation.

Parts: 32 picture cards. Each gives what it is, how it works, the material, checks and the examiner's questions, with a Show in 3D button.

Diagrams: eight system drawings, two labelled pictures and six drawings of the propulsion train, the controllable pitch hydraulic system, the load diagram and combinator, the common rail fuel system, the V engine running gear and the dual fuel gas system. Tap a drawing to open it full screen and pinch to zoom.

Operation: before starting, starting, running checks, stopping, after stopping, emergency operation and safety points.

Oral Questions: choose EOOW, Class 2 or Class 1 and a topic, say your answer aloud, then reveal the model answer with key points and the source. Mark yourself Got it, Nearly or Missed; progress is kept on your device.

Picture Quiz: a picture of a part and four names. Multiple Choice Quiz: questions with the answers shuffled every time.

Glossary of four-stroke engine and propulsion terms.

Maintenance and Faults and Remedies: intervals, procedures, symptoms, causes and actions, from daily checks and clutch and gearbox care to CPP hydraulic leaks, smoke, high exhaust temperature and dual-fuel knock.

SYLLABUS
Every oral question is mapped to the MCA engineer oral examination syllabus, MIN 654 (M) Amendment 1 (April 2026), and the relevant knowledge lines of the EOOW and Chief/Second Engineer competency grids are covered by at least two questions. Browse the questions by grade or by MIN 654 competence.
Source of the syllabus: Maritime and Coastguard Agency, MIN 654 (M) Amendment 1, published on gov.uk: https://www.gov.uk/government/publications/min-654-m-engineering-and-electro-technical-officer-oral-exam-syllabus-amendment-1 . This app is an independent study aid and is not affiliated with or endorsed by the MCA or any government body.

FREE AND PRO
Free: the 3D model, How it Works, all part cards, Operation, the glossary, the system diagrams, the EOOW oral questions, 15 multiple choice questions and 10 picture quiz items.
Pro (one payment, no subscription): the Class 2 and Class 1 oral questions, Faults and Remedies, Maintenance, the full quizzes and Search.

PRIVATE AND OFFLINE
No adverts, no analytics, no account, no data collected. Purchases are handled by Google Play. Everything works offline.

ABOUT THE CONTENT
Content based on the operating manuals of a reference medium-speed engine, the author's teaching and general marine engineering knowledge; not affiliated with any manufacturer. The explanations are the author's own, informed by the operating manuals of a typical four-stroke propulsion installation. Figures quoted are typical ranges. Your own engine will differ.

Created by Anindya Banerjee
www.anindyabanerjee.co.uk

For educational use only. Always consult the engine maker's instruction manual, your company procedures and your ship's own documentation.