AEC

    AEC revision, engine theory you can use in the engine room

    Marine diesel theory for AEC1 and AEC2: how the systems work, what fails, and how you would diagnose it. Written for people who will be knee deep in a bilge, not sitting an academic paper.

    Systems and daily checks
    AEC1Systems and daily checks
    Diagnostics and servicing
    AEC2Diagnostics and servicing
    Every answer
    ExplainedEvery answer

    AEC1

    • Engine principles and the four stroke cycle
    • Fuel system, filters, bleeding and contamination
    • Cooling system, raw water, impellers and heat exchangers
    • Lubrication, oil checks and consumption
    • Batteries, starting and drive belts
    • Stern gear and the daily check routine

    AEC2

    • Advanced fuel systems and common rail
    • Electrical systems and charging faults
    • Cooling diagnostics and overheating logic
    • Exhaust systems and emissions
    • Transmission and gearbox
    • Servicing schedules, winterisation and layup

    Common questions

    Does AEC revision cover both levels?

    Yes, AEC1 and AEC2 are separate banks so you only see the level you are entitled to and are working on.

    Is practical work required?

    Yes. Engine work is hands on and the certificate comes from an approved centre. Theory revision just means you are not learning the basics for the first time with a spanner in your hand.

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    Amidships is an independent study tool and a trading name of The Maritime Consultancy Ltd (Company No. 13436865), registered in England and Wales. Content is based on publicly available syllabuses and the STCW Convention. Always verify with current official publications before examination. Amidships does not issue certificates or qualifications, including STCW certificates, which are issued only by approved training centres.