3.4
compression ignition engine
engine in which ignition is obtained by means of compressing the fuel/air mixture
3.5
accessible
capable of being reached for inspection, removal or maintenance without removal of permanent boat structure
3.6
readily accessible
capable of being reached for operation, inspection or maintenance without removal of craft structure or use of any tools or removal of any item of portable equipment stowed in a place intended for storage of portable equipment such as lockers, drawers or shelves
3.7
leak free
no drips or wetting of surface areas at the interface of connecting components and pipe joints due to misting atomisation, or liquid from fuel, lubrication and of coolants under normal engine operating conditions
4 General
4.1 Engine-mounted fuel system components, such as unit injectors pressure rails, fuel pressure pumps, reservoirs, and all unit injector associated components, fuel injection pumps, injectors and spill racks, high pressure pipes, filters, fuel lift pumps, low pressure fuel piping and hoses and fuel starting aids shall be leak free under normal operation to minimise the risk of fuel entering the engine compartment.
4.2 All sealing material such as gaskets, o-rings, joint-rings etc. shall be of non-wicking, i.e non-fuel absorbent type.
4.3 All engine-mounted fuel systems components i.e,filters, flexible hoses,pumps etc., shall individually or as installed withstand a 2,5 min fire test as described in ISO 10088 Annex B or ISO 7840, Annex A.
4.4 Each component of the system and the system as a whole shall be capable of operation within an ambient temperature range of - 10゜C to + 80゜C without failure or leakage and be capable of being stored without operation within an ambient temperature range of - 30゜C to + 80゜C without failure or leakage.
4.5 Engines shall be equipped with an independent emergency stop device that can be remote-operated.
5 Engine fuel system components
5.1 High pressure pipes and injectors
5.1.1 High pressure pipes shall be made of wrapped or solid drawn corrosive resistant coated steel tubing.
5.1.2 High pressure pipes shall be secured to prevent vibrations leading to pipe fracture at all operating engine speeds.
5.2 Low pressure fuel lines
5.2.1 Fuel lines between the fuel injection pump, filters, injector spill rack outlets and the terminal points for feed and return to fuel tanks shall be seamless copper or copper alloys, stainless steel, or corrosive resistant coated mild steel pipe with soldered or brazed end forms, or male/female straight-in pipes with compression ring sealings and screwed compression connections.
5.2.2 Flexible hoses shall meet the requirements of ISO 7840 and shall be equipped with permanently installed end fittings such as a swaged sleeve, threaded insert or connections with compression ring sealing.
5.2.3 All low pressure pipes shall be secured into position so as to prevent damage due to excessive vibration leading to pipe fracture. All flexible hoses shall be located away from non-insulated components with a surface temperature above 200゜C but remain accessible for inspection and maintenance.
5.3 Fuel filters
Fuel filters shall be independently mounted to avoid stress on pipe connections. Fuel filters shall be readily accessible. Spillage deflectors shall be provided where it is possible for fuel to be spilled on to other vulnerable engine components, e. g. starter motors, alternators or turbo chargers.
5.4 Starting aids
Aids shall be designed and constructed to ensure that they cannot be brought into or kept in action when the engine is running normally.
