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Caterpillar performs retrofit on LNG carrier

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LNG Industry,

Caterpillar Marine has completed the commercial marine industry’s first dual fuel engine retrofit conversion in hull.

The company, along with Cat® dealer Bolier, completed an in hull retrofit onboard the Coral Anthelia, an Anthony Veder LNG carrier, in under six weeks.

The MaK M 43 C diesel engine was retrofitted to the six cylinder M 46 dual fuel platform, with each cylinder offering 900 kW of rated power. As a result of performing the retrofit within the hull, no modifications had to be done to the ship’s structure and no docking was required. 

The M 46 dual fuel engine was designed for both electric drive propulsion systems and mechanical propulsion systems. It has a bore of 460 mm and stroke of 610.

The M 46 DF is designed for unlimited operation on LNG, marine diesel oil and heavy fuel oil. It was strategically engineered to allow for the retrofitting of current M 43 C engines. Additionally, existing M 32 C engines can be retrofitted to the MaK M 34 DF dual fuel platform. As a result of the synergies between the two platforms, Caterpillar can perform in hull retrofit conversions without having to move the engine block or perform extensive machining.

Karl Vollrath, Caterpillar Marine Customer Service Manager, said: “Caterpillar is firmly committed to providing sustainable, flexible solutions that enhance our customers’ operations. We’re proud of the collaborative effort between Anthony Veder, Cat dealer Bolier and our engineering team to successfully achieve a beneficial industry milestone […] As an LNG carrier operating in waters impacted by SECA regulations, the Coral Anthelia will be able to optimise its performance utilising LNG, heavy fuel oil or diesel.”

Adapted from press release by

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