Case Study
Neptunus Power
Oct 1, 2025
A marine engine overhaul is a planned maintenance procedure performed to inspect, repair, and restore major components of a ship’s propulsion engine. During a marine diesel engine overhaul, critical parts such as pistons, cylinder liners, crankshaft bearings, fuel injection systems, and cylinder heads are inspected and repaired to ensure the engine operates safely, efficiently, and reliably. A properly executed ship engine overhaul helps maintain propulsion reliability, reduce fuel consumption, and prevent unexpected engine failures.
Neptunus Power provides OEM-aligned marine engine overhaul services supporting both main engine and auxiliary engine overhaul projects. Our engineering teams perform in-situ ship engine overhaul services onboard vessels as well as workshop-based overhaul of marine diesel engines, depending on vessel schedules and operational requirements.
Our marine engine overhaul services across multiple engine makes, including Niigata (OEM Authorized), CAT (Independent Service Provider), EMD (OEM Authorized), Wartsila (Independent Service Provider), Yanmar (Independent Service Provider), MAN (Independent Service Provider), MTU (Independent Service Provider), and Detroit (Independent Service Provider).
Our engineers provide marine diesel engine overhaul support across major maritime regions, including India (Mumbai, Cochin, Goa, Kolkata, Chennai, Visakhapatnam, Haldia), as well as key international markets such as the UAE, Qatar, Saudi Arabia, Singapore, Vietnam, Egypt, Nigeria, Mozambique, Ghana, and Namibia, enabling reliable technical support for vessels operating in these locations.Send in your Enquiry for a Quote
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Track Record of Job Completion on or Before Planned Timeline
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The marine engine overhaul procedure begins with a detailed condition assessment and scope definition. Engineers evaluate engine performance data, maintenance history, and inspection findings to determine the required main engine overhaul scope. Based on this assessment, dismantling, inspection, repair, and reassembly of components are carried out according to OEM-aligned procedures.
Critical components are measured, repaired, or renewed as required, and the engine is reassembled in line with OEM-aligned standards. Final commissioning and functional checks are carried out before the engine is returned to service, supported by proper documentation for class and operational records. This structured approach ensures dependable performance after overhaul and supports long-term engine health.With our asset reliability management services, we believe in building long-lasting partnerships with our clients, going beyond short-term projects to provide customized solutions. By understanding their needs, we work towards their goals of improving operational efficiency. Our expertise lies in overcoming maintenance challenges with cost-effective, reliable, and sustainable methods, using the latest technology.
Today, with the use of our proprietary, dual-class (ABS and IRS) approved condition monitoring system for engines and our in-house holistic oil quality management solution, which includes a real-time oil condition monitoring system, a continuous kidney loop oil filtration system, we have helped our customers in the following ways:Send in your Enquiry for a Quote
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