MAN Engine Repair and Overhaul Services

MAN Engine Repair and Overhaul Services

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MAN Marine Services, by Neptunus, encompasses expert overhaul and repair solutions that are designed to uphold engine efficiency. We understand the critical importance of MAN engines in the maritime industry, which is why we are dedicated to ensuring optimal performance and longevity through our comprehensive services.

 With a total of 3 decades of service experience and a team of more than 27 highly skilled engineers, we have worked on various marine vessel projects, honing our expertise in overhaul and repair operations.

At Neptunus, we take pride in the quality of our overhaul services for MAN engines. With a dedicated team of 6+ MAN experts, we ensure strict adherence to OEM maintenance guidelines, ensuring optimal performance and reliability for your assets.

We are an independent  MAN engine service provider aimed at enhancing the reliability of your engines. Our engineers provide on-site support for overhauls, fault diagnosis, commissioning, and alignments, whether offshore or onshore. Alternatively, we offer MAN engine repair services at our dedicated workshop in Mumbai. Furthermore, we back our work with a 6-month warranty on all completed engine repairs of the MAN engine.

Our expertise extends beyond traditional services. We leverage cutting-edge technologies, optimize spare parts usage, and streamline the scope of work to minimize downtime and reduce overall maintenance costs. Our comprehensive approach encompasses not only repairs but also the implementation of innovative solutions to maximize the reliability and longevity of your MAN engines.

Get the Best Quote for Your MAN Engine Repair Requirements

Challenges in MAN Engine Repair and Overhaul Services?

  • Complexity of the engines: Wartsila engines are complex machines with many moving parts. This complexity can make it difficult to diagnose problems and perform repairs.
  • Specialized skills and tools: Working on these engines requires technicians with specialized skills and knowledge of Wartsila’s specific maintenance procedures. Additionally, specialized tools are often needed for disassembly, repair, and reassembly.
  • Cost of parts and labor: Genuine Wärtsilä spare parts can be expensive, and the labor required for repairs and overhauls can be significant.
  • Planning and logistics: Wartsila engine services are major undertakings that require careful planning and coordination. This includes scheduling downtime, procuring parts, and ensuring qualified personnel are available.
  • Remote location challenges: For engines operating in remote locations, like offshore platforms, transporting technicians, tools, and spare parts can be expensive and time-consuming. Additionally, troubleshooting and diagnostics can be more complex due to limited on-site resources.

Why Choose Us for MAN Engine Repair and Overhaul Services?


With over 3 decades of service experience, Read more

Shortest Turnaround Time

Our priority is the shortest turnaround time Read more

Remote and On-Site Support

Alongside on-site MAN diesel engine Read more

Genuine and Optimized Spare Parts List

We offer genuine MAN spare parts to Read more

Utilization of Advanced Technology

We harness the latest and most advanced Read more

Get a Quick Quote for Your MAN Engine Repair Requirements

Beyond Repair and Overhaul for Your MAN Engine

At Neptunus,our asset reliability solutions asset reliability management and maintenance solution is committed to forging lasting strategic partnerships with our clients, not just completing short-term projects. Our approach involves tailoring solutions to their needs, playing a vital role in achieving their overarching goals of operational efficiency in a cost-effective, reliable, and sustainable manner. We tackle maintenance challenges head-on using the most advanced technology available to us.

Today, thanks to our proprietary dual-class (ABS and IRS) approved condition trend monitoring for engine and our holistic oil quality management solution which includes a condition monitoring for oil , continuous kidney loop oil filter system , we’ve been able to assist our clients in:

  • Saving anywhere between ~$20,000 and $60,000+ in engine overhaul costs (around 30% savings).
  • Preventing unexpected downtime.
  • Enhancing fuel combustion efficiency.
  • Reducing and offsetting carbon emissions to meet your ESG objectives.
  • Complying with the IMO’s EEXI Regulation.
  • Improving maintenance planning, especially for assets situated in challenging locations.

If your company aims to achieve similar milestones, schedule a “discovery call” with our experts to learn how we can assist you.

In addition to our MAN engine services, we are an independent service provider for wartsila engine service services and for caterpillar engines repair services, offering a comprehensive suite of solutions for the marine and oil & gas industry. Our machines repair and overhaul services for cover a broad range, including main diesel engine repair , propulsion system repairs, and genset repair. With our expert team, we guarantee top-notch service and reliability for all your machinery needs, from engines to propulsion systems and beyond.

Get the Best Quote for Your Cat Engine Repair Requirements

Repair and Overhaul Service's Expertise with MAN Engine Models

MAN L+V48/60CR MAN L21/31
MAN L+V32/44CR MAN 12V28/33D
MAN PA6 B OG​ MAN 16 V28/33D
​MAN V28/33D STC​ MAN 20 V28/33D
​MAN L27/38 MAN 12 PA6 BOG

Other Engine Overhaul and Repair Services

Machine reliability and maintenance management are important for ensuring stable operations, with effective management leading to reduced downtime and improved machine’s reliability in the marine industry. Maintenance plays a very important role in proper asset management.

Several factors influence asset performance, including wear and tear, malfunctioning components, environmental degradation, safety concerns, efficiency decline, regulatory adherence, and unplanned downtime. Effective ship engine maintenance services not only extend the life of vital equipment, but also reduce the danger of environmental incidents and ensure the maritime industry’s sustainability.

As an OEM-authorized maintenance service provider for MAN engines, we provide dependable performance through repair and overhaul services. Our experience ensures that your MAN engines remain in optimum condition, reducing downtime and increasing operational efficiency for our clients. In addition to MAN engines, we provide maintenance services for the other prominent marine engine brands listed below.

  • MRO Services for Niigata Engine

As an OEM-authorized Niigata engine repair overhaul and maintenance provider, we specialize in delivering high-quality repair and overhaul solutions for both engines and Z-Pellers.

  • EMD engine MRO services:

As an OEM-authorised EMD engine repair service provider, we specialize in providing all types of maintenance services, including repair, overhaul, inspection, and troubleshooting services for EMD marine engines.

  • Cat engine MRO services: 

With a team of 27+ experienced engineers, including 6+ CAT engine repair experts, we provide cat engine repair and maintenance services according to the OEM manual guidelines, providing exceptional quality.

  • Yanmar engine maintenance services:

We are an independent Yanmar engine repair and overhaul service provider dedicated to improving the reliability of your engine.

Given the diverse nature of machinery utilized in the marine industry, each asset demands customized maintenance solutions to uphold its operational integrity. At Neptunus, we recognize the importance of this tailored approach to ensuring the optimal performance and longevity of marine equipment. By leveraging our expertise and industry-leading practices, we not only safeguard the reliability of these assets but also mitigate the potential risks associated with unplanned downtime.

Our extensive range of ship machine maintenance, outlined below, is tailored to meet the distinct needs of diverse marine equipment.

  • Marine Diesel Engine Repair Services:

Keeping marine diesel engines in good shape is vital for engine reliability. Our engine repair of marine assets is important as it swiftly tackles any issues, preventing breakdowns and ensuring top performance at sea.

  • Marine Diesel Engine Overhaul Services:

iesel engine overhauling ensures optimal performance and longevity, reducing the risk of breakdowns and costly repairs while enhancing the reliability of marine assets.

  • Best Gearbox Maintenance Services in Marine:

Maintenance services for gearboxes from Neptunus help minimize wear and tear, mitigate the risk of component failure, and maximize the efficiency and lifespan of marine equipment, contributing to overall asset reliability.

  • Marine Clutch Maintenance Services:

Regular maintenance of the marine clutch ensures smooth and efficient operation, preventing slippage and premature wear, thereby extending the lifespan and reliability of critical propulsion systems.

  • Bow-Thruster Maintenance and Repair Services:

Timely repair of the bow thruster optimizes health and reduces the likelihood of downtime.

Aside from maritime maintenance, we additionally specialize in ship engine spare parts for well-known companies such as CAT, EMD (OEM Authorized), and Niigata (OEM Authorized).

As a marine engine spare parts supplier, we offer genuine spare parts. Our extensive inventory, which includes the above mentioned engine brand’s spare parts, enables us to address the different needs of our clients. We take great satisfaction in providing genuine engine spare parts to our maritime clients at low costs, ensuring quality and affordability.