Case Study
IDO Marmara Ferries | Baudouin Case Study
IDO Marmara Ferries Powered by Baudouin Marine Gensets
CASE STUDY
- Cylinders: 4
- Bore & Stroke (mm): 105x130
- Total Displacement (L): 4.5
- Flywheel: SAE 3
Solution
- 16 x Baudouin 4W105S marine gensets
- P1 Continuous Duty
- High-speed passenger catamaran auxiliary power
- BTM Avrasya | Istanbul Deniz Otobüsleri / IDO
Baudouin Marine Gensets for IDO Marmara Ferries
Istanbul Deniz Otobüsleri, IDO, Türkiye’s largest fast-ferry operator, has completed a major fleet-wide repowering project for its Marmara-class passenger catamarans.
These aluminium high-speed ferries, originally delivered in the late 1980s, are the workhorses of commuter and intercity sea transport across the Sea of Marmara.
After decades of intensive service, their auxiliary generator sets were due for renewal to meet modern expectations in efficiency, reliability, noise reduction and passenger comfort.
In partnership with BTM Avrasya, IDO selected Baudouin’s proven 4W105S marine gensets to provide robust, low-noise and fuel-efficient ship service power.
The project covered eight vessels, each receiving two Baudouin 4W105S units, for a total of sixteen genset installations.
The compact footprint of the 4W105S allowed smooth integration into the ferries’ existing machinery spaces, while preserving service access for crew and maintenance personnel.
Each new genset is class-approved by Bureau Veritas and accepted by Türk Loydu under the vessels’ operating notations.
Rated at approximately 84 kWe at 1500 rpm, the Baudouin 4W105S delivers consistent hotel-load power for lighting, HVAC, ticketing systems, navigation electronics, CCTV and passenger amenities.
The units are coupled to high-efficiency marine alternators and integrated into the vessels’ main switchboards.
This configuration provides redundancy with automatic changeover, helping ensure uninterrupted power supply during ferry operations.
The full project included sixteen Baudouin 4W105S marine gensets across eight Marmara-class ferries.
Each vessel received two units, creating a reliable auxiliary power setup adapted to high-frequency passenger transport.
Commissioning took place between late 2023 and January 2024, with class surveyors witnessing dock and sea trials on each vessel.
This fleet-wide deployment demonstrates Baudouin’s ability to support operators managing multiple vessels with consistent technical standards, installation quality and after-sales support.
The 4W105S is an inline 4-cylinder, 4.5-litre marine-duty genset.
It is turbocharged and equipped with modern fuel injection to support optimal combustion and reduced specific fuel consumption.
Like the larger engines in Baudouin’s W-series, the 4W105S is designed for serviceability. Unit cylinder heads, wet liners and generous inspection access help simplify routine maintenance and reduce turnaround time.
Designed for low vibration and low noise, the genset contributes to quieter passenger saloons and improved working conditions for crew.
The Baudouin 4W105S gensets are configured for P1 Continuous Duty.
This makes them suitable for regular auxiliary power generation across demanding ferry routes, where electrical systems must operate reliably throughout daily service.
In variable-load ferry operation, the gensets maintain stable voltage and frequency, helping reduce fuel wastage during low-demand periods.
Initial operational feedback from IDO indicates measurable gains, including estimated fuel savings of 5% to 10% in typical duty cycles, along with reduced downtime and lower fault incidence.
Since entering service, the new gensets have operated without unplanned stoppages, supported by Baudouin’s global service and parts network and BTM Avrasya’s local technical team.
By upgrading its Marmara-class ferries with Baudouin marine generator technology, IDO has extended the service life of its fleet while improving passenger comfort and reducing operating costs.
BTM Avrasya supported the project as Baudouin’s distributor, helping ensure successful integration, commissioning and technical follow-up across the fleet.
Baudouin’s marine range covers a complete spectrum, from compact auxiliary generators such as the W-series to high-power propulsion engines.
This allows operators to source both propulsion and auxiliary power from a single, integrated marine engine brand.
For operators, this means better technical compatibility, streamlined maintenance and unified global support.
With IMO-compliant designs, biofuel-ready capability and options for hybrid integration, Baudouin’s marine portfolio serves commercial, passenger, offshore and defence vessels worldwide, backed by a service network in more than 130 countries.
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