Overview
EN ISO 16147:2021 (identical to ISO 16147:2020) specifies requirements for the design and installation of engine‑mounted fuel, oil and electrical components on diesel inboard engines fitted to small craft (hull length up to 24 m as defined by ISO 8666). The standard aims to minimize fuel leakage, risk of electric shock, and the risk or spread of fire originating from components attached to the engine. EN ISO 16147:2021 supersedes the 2018 edition and is intended as a harmonized means of meeting relevant requirements of EU Directive 2013/53/EU when cited in the Official Journal.
Key topics and technical requirements
- Scope and definitions: Covers engine‑mounted components that remain attached while the engine is operating (fuel, lubrication and electrical parts).
- Leak‑free fuel and lubrication systems: No dripping, wetting, misting or atomization at joints or interfaces under normal operation.
- Materials and seals: Components and materials must resist diesel and biodiesel (including FAME) and use non‑wicking sealing materials (gaskets, O‑rings).
- Operating and storage temperatures: Components must operate reliably from −10 °C to +80 °C and be storable to −30 °C to +80 °C without failure or leakage.
- Accessibility and shielding: Parts requiring frequent inspection/servicing must be accessible; exposed or hot components that could cause injury must be effectively shielded.
- Routing and fire risk: Installation must minimize fire risk and spread; wiring and components should be routed away from engine hot areas.
- Fuel system components: Requirements and treatment of high‑pressure fuel pipes, low‑pressure fuel lines, and fuel/lubrication oil filters.
- Electrical system components: Guidance for cranking motors, wiring and connections, and relays, fuse boxes and electronic control modules (ECMs) to reduce electrical fire and shock risks.
- Documentation: Provision of an installation manual describing layout, servicing access and safety considerations.
Applications and users
This standard is essential for:
- Boat builders and naval architects specifying inboard diesel installations on small craft
- Engine and component manufacturers (fuel pumps, filters, ECMs, cranking motors)
- Marine electrical installers and system integrators
- Surveyors, certifiers and regulatory compliance officers assessing conformity with EU Directive 2013/53/EU
- Safety engineers and maintenance personnel implementing best practices to reduce leakage and fire/electrical hazards
Related standards and references
Normative references cited include:
EN ISO 16147:2021 is a practical, safety‑focused standard for reliable, compliant inboard diesel engine installations on small craft.
