YANMAR ENGINE
REPAIR & OVERHAUL

SERVICES

OEM-Trained Engineers
30% Faster
Turnaround Time
vs. OEM
Benchmark
30% Cost Reduction
with technology,
maintaining
reliability until the
next overhaul
Timely
Deployment
(Access to
Multiple
PRs & CDC)
Comprehensive
Support On-site,
Off-site, Remote,
including
Riding Squad
12-Month
Workmanship
Warranty
Access to Specialized
Tools such as Chris
Marine Cylinder Liner
Honing, Valve Seat
Machining Tool
Adherance to
OEM Standards
Detailed
Work Completion
Report

Neptunus Power Plant Services is an independent service provider and supports ship owners and operators of Yanmar engines by delivering compatible spare parts and customized repair, overhaul and maintenance solutions. Neptunus is not affiliated with Yanmar group, Japan.

Yanmar diesel engines repair are one of the core of our capabilities. As an independent provider of Yanmar engine service, Neptunus Power focuses on enhancing the performance and dependability of your engines through precision-driven overhaul and repair services.

With more than three decades of experience and a team of marine engine specialists dedicated exclusively to Yanmar diesel repair and maintenance, we deliver a complete range of services from diagnostics, troubleshooting, and repairs to scheduled overhauls and detailed inspections ensuring your engines operate at peak performance and reliability.

We use compatible Yanmar engine parts and follow OEM-compliant procedures to ensure long-lasting, reliable repairs. Leveraging advanced diagnostic tools and predictive maintenance techniques, we help ship operators avoid costly breakdowns while minimizing operational risks.

When you choose Neptunus, you partner with a service provider committed to redefining diesel engine maintenance. We stand out by reducing maintenance costs, improving engine reliability, and achieving results with a turnaround time that’s 30% faster than the industry average.

Our Yanmar diesel engine service is available at our workshops or directly at your vessel’s location. In India, we operate across key ports including Mumbai, Cochin, Goa, Kolkata, Chennai, Visakhapatnam, and Haldia. Internationally, we serve customers across South Asia, the Middle East, Europe, Africa, and beyond ensuring global access to expert Yanmar marine engine service and support.
Disclaimer: Neptunus is an independent spare parts and service provider. Yanmar is a trademark of Yanmar group, Japan.

Send in your Enquiry for a Quote

Why choose Neptunus?

3 Decades of
Service Excellence
Engine & Propulsion
End-to-End Solutions
2500+ Successful Projects Delivered Worldwide
Trusted by 100+
Satisfied Customers
Dedicated Experts to
Address Emergencies

Challenges in Yanmar Engine Repair & Overhaul Services

Accurately evaluating the extent of Marine Engine Overhaul services required and determining the appropriate scope of work demands technical expertise.
Strict adherence to Yanmar’s engine service guidelines is crucial for preserving engine warranties and ensuring optimal performance.
Finding experienced technicians with specialized knowledge in main engine and Auxiliary Engine Overhaul services can be a significant challenge.
Ensuring the availability of genuine Spare Parts for Yanmar Engines can be problematic, leading to suboptimal performance or compatibility issues.

Yanmar Engine Repair & Overhaul Service Expertise with Engine Models

Yanmar Models Table
Yanmar 6LY2A-STP Yanmar 6EY26 Yanmar 4KDL Yanmar 6HAL2 Yanmar 6AYM Yanmar 8EY26

Send in your Enquiry for a Quote

Beyond Repair & Overhaul for Your Yanmar Engine

At Neptunus, our Asset Reliability Solution is all about building lasting partnerships with our clients, focusing on long-term strategies rather than just short projects. Our aim is to provide tailored solutions that align with your goals of efficient operations in a sustainable and cost-effective way. We understand the challenges you face with maintenance, which is why we leverage the latest technology to overcome these hurdles.

Our in house, proprietary solution include Diesel Engine Monitoring System system and our in-house comprehensive Oil Quality Management Solution featuring real-time Oil Condition Monitoring, continuous Kidney Loop Filtration system, and all these technologies help our customers in the following ways:
If you’re interested in achieving similar success for your business, schedule a “Discovery Call” with our experts to explore how we can assist you.

Related Engine Brands For Which We Provide Repair & Overhaul Service

Beyond its expertise in Yanmar engine repairs, Neptunus Power is widely recognized for its exceptional Wartsila Engine Repair Services, along with other leading engine brands. Explore the full list of brands we service below:

Related Case Studies

FAQs

Yes, Yanmar engines can be repaired by us. As an independent Yanmar repair and overhaul service provider with three decades of experience and over 27 skilled engineers, we offer comprehensive repair services for all types of Yanmar engines.
Common causes of Yanmar engine failure include:

Lack of proper maintenance

Fuel system issues

Overheating

Lubrication problems

Wear and tear of components

Contamination in fuel or oil

Signs of a problematic Yanmar engine include:

Unusual noises or vibrations

Decreased performance or power output

Excessive smoke from the exhaust

Increased fuel consumption

Oil leaks or low oil pressure

Engine overheating

To prevent Yanmar engine damage, perform regular preventive maintenance, Conduct routine inspections, change oil and filters as recommended, and ensure proper cooling and lubrication. Also, you can install our ABS and IRS class-certified Engine Condition Monitoring System for early detection of potential issues in your Yanmar engine.
Turnaround time varies depending on the extent of repairs needed. We strive to complete most repairs as quickly as possible, typically within a few days to a couple of weeks. For complex overhauls, it may take longer. We’ll provide a more accurate timeline after initial inspection.
We service all types of Yanmar engines, including:

Yanmar Marine Engines

Yanmar Industrial Engines

Yanmar Generator Engines

The Yanmar engine overhaul process typically involves:

Complete disassembly

Inspection of all components

Cleaning and reconditioning of salvageable parts

Replacement of worn or damaged components

Reassembly with new gaskets and seals

Testing and adjusting to ensure optimal performance

The cost of an overhaul varies depending on the engine model, extent of wear, and required parts. We provide detailed quotes after initial inspection. Factors affecting cost include engine size, age, and condition. Click here, to get in quick quote for your yanmar engine overhaul.
A properly performed overhaul can significantly extend an engine’s life, often adding several thousand operating hours. The exact duration depends on usage patterns and maintenance practices.
General maintenance includes:

Regular oil and filter changes

Fuel system checks and cleaning

Cooling system maintenance

Belt inspections and adjustments

Valve clearance checks

Regular inspections for wear and leaks

Fill in Details for a Quote

*The report will be shared only if a valid work or company email ID is provided.