Engine Profile
Isola Naida is powered by a 2008 Yanmar 4JH4E, a four-stroke, four-cylinder marine diesel engine producing 51 hp. The engine uses a freshwater-cooled closed cooling circuit with seawater providing heat rejection through the heat exchanger. Engine power is transmitted through a ZF 30M marine transmission.
Engine
Manufacturer: Yanmar
Model: 4JH4E
Year: 2008
Type: Four-stroke marine diesel
Power: 51 hp
Cooling: Freshwater-cooled, seawater-cooled heat exchanger
Transmission: ZF 30M
Reliability and Maintenance
The Yanmar 4JH4E is a well-established marine diesel engine designed for long-term service when properly maintained. Actual service life varies considerably depending on operating conditions, maintenance history, engine loading, corrosion, and cooling-system condition.
Routine maintenance includes replacement of:
- Engine lubricating oil
- Oil filter
- Primary and secondary fuel filters
- Seawater pump impeller
- Seawater pump cover gasket, as required
- Air filter, as required
The engine’s cooling system, belts, hoses, seawater pump, exhaust system, fuel system, and transmission should also be inspected and serviced according to the Yanmar maintenance schedule.
Detailed maintenance procedures and component-specific information should be documented in the relevant sections of the Isola Naida knowledgebase.