Operational Guide · Registers & Logbooks

# Methanol Engines: Reliability and Spare Parts Management in a Still-Young Technology

Orders for methanol-fuelled ships collapsed from 149 to 61 in a single year: not due to a strategic change of course, but because of engine reliability problems that emerged in the first fleets in service.

methanol engines dual fuel reliability critical spare parts

## Operational Explanation

Unlike dual-fuel LNG engines, a relatively mature technology with solid accumulated operational experience, methanol engines remain a young technology, with a limited number of real running hours accumulated on the first delivered units. Engine reliability problems encountered in the first fleets in service, addressed by the manufacturer through its own technical support service, have contributed significantly to a marked slowdown in orders: from 149 in 2024 to just 61 units the following year.

This slowdown has direct implications for critical spare parts management: unlike conventional or LNG engines, for which an established spare parts supply chain exists, the specific components of methanol engines (dedicated injectors, seals for the fuel supply system, combustion control system components) remain subject to longer lead times and lower standardization between manufacturers, precisely because of the technology's relative immaturity.

## Regulatory Reference

There is no single regulatory standard dedicated to spare parts management for methanol engines; the general ISM Code par. 10.3 principles on critical equipment and spares apply, supplemented by the engine manufacturer's specific recommendations, particularly relevant given the relative technological immaturity and the reliability problems that emerged in the first fleets in service (2024-2025).

## Scope of Application

Every ship fitted with dual-fuel methanol engines, with particular attention from first-generation Companies adopting this technology to the preventive management of specific critical spares.

## Procedure / How to Complete It

1. Identify the specific components of the methanol system (dedicated injectors, fuel supply system seals, combustion control components) as a separate category of critical spares, distinct from that of conventional engines.
2. Coordinate with the engine manufacturer and its dedicated technical support service (e.g. PrimeServ programmes or equivalents) for the preventive identification of components most prone to reliability problems in the first fleets.
3. Plan longer lead times for spares specific to the methanol system, given the less established supply chain compared to conventional or LNG engines.
4. Systematically document every extraordinary maintenance intervention linked to reliability problems, sharing the data with the manufacturer to contribute to continuous improvement of the engine platform.
5. Do not assume that spare parts logistics for methanol engines follow the same timelines and availability as the LNG supply chain, which today is more mature and established.

## Practical Example

Example: a Company operating among the first delivered methanol ships establishes a dedicated technical support contract with the engine manufacturer, including remote monitoring of combustion parameters and priority dispatch of critical spares identified as subject to greater wear on the first units of the series.

## Real Cases

The collapse in methanol ship orders from 149 in 2024 to 61 the following year, attributed in significant part to engine reliability problems in the first fleets in service, illustrates how the adoption of an alternative fuel carries real technological risks in its initial introduction phase, distinct from the regulatory or infrastructural risks already more widely discussed in the industry.

## Common Mistakes Mistake Library

Mistake | Consequence | How to avoid it
--- | --- | ---
Spares for methanol engines managed with the same logistics and timelines expected for conventional or LNG engines | Delays in the availability of specific critical spares, with prolonged machinery downtime | Plan longer lead times and dedicated management for spares specific to the methanol system
Engine reliability problems generically attributed to isolated defects, without systematic data sharing with the manufacturer | Loss of information useful for improving the engine platform and for better future prevention | Systematically document and share every extraordinary intervention with the manufacturer and its technical support service
No dedicated technical support contract signed for a still-young engine technology | Lack of priority support in the event of reliability problems on the first units of the series | Sign dedicated technical support agreements with the manufacturer, especially for the first ships of a new engine platform

## PSC Observations

Spare parts management for methanol engines is not typically subject to direct PSC documentary verification, but reliability problems not resolved in time due to lack of spares can emerge indirectly in the event of detention for failure of essential equipment.

## Operational Tips

- Don't rely on the same spare parts logistics used for conventional or LNG engines: lead times for components specific to the methanol system remain longer.
- Sign a dedicated technical support contract with the manufacturer, especially if operating among the first units of a new methanol engine platform.
- Systematically document and share every reliability problem encountered, contributing to the technology's continuous improvement.

## Checklist

- Specific components of the methanol system identified as a separate category of critical spares
- Dedicated technical support contract with the engine manufacturer verified or signed
- Lead times for specific spares planned with adequate margin relative to the less mature supply chain
- Extraordinary maintenance interventions documented and shared with the manufacturer
- Spare parts logistics expectations calibrated on the real maturity of methanol technology, not on that of LNG

## FAQ

Why did orders for methanol ships decrease sharply between 2024 and 2025?
In significant part due to engine reliability problems encountered in the first fleets in service, in addition to regulatory uncertainty: orders fell from 149 in 2024 to 61 the following year.
Do spares for methanol engines have the same availability as those for LNG engines?
No: the LNG supply chain is more mature and established, while the specific components of methanol engines (dedicated injectors, fuel supply system seals) remain subject to longer lead times.
What can Companies do to mitigate the risk of downtime on methanol engines?
Sign dedicated technical support contracts with the manufacturer, plan longer lead times for specific spares, and systematically document every reliability problem encountered.
🎬 Additional photos, videos and interactive diagrams for this topic will be available in a future version of the platform.

## Related Topics

Critical Spare Parts Management Methanol and Ammonia Bunkering: Infrastructure and Real Cases (IT)

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