Capt. Jeff Werner

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Diesel Digest: Choose fuel additives carefully

Diesel Digest: by Capt. Jeff Werner Diesel fuel additives are an important part of a yacht’s fuel preventive maintenance program. There are many brands of diesel additives with a variety…

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Diesel Digest: Inverter generators power up some ‘new school’ advantages

Diesel Digest: by Capt. Jeff Werner The phrase “old school” is heard so often now in the yachting industry that older captains and engineers sometimes feel out of sync with their…

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Diesel Digest: Fuel properties drive diesel engine’s performance

Diesel Digest: by Capt. Jeff Werner Whether diesel engines are powering a yacht, a jet drive tender, an onboard generator or a crew car, their performance is directly related to…

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Diesel Digest: Study on Dutch vessels points to all-electric future

Diesel Digest: by Capt. Jeff Werner The Dutch government plans to ban all new diesel and gasoline vehicles from its roads beginning in 2030. While this trend toward zero emissions for…

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Diesel Digest: Stricter regulations helped develop new diesel engine pollutant treatments

Diesel Digest: by Capt. Jeff Werner Diesel engines are designed for two broad application categories: on-road (such as trucks, cars and buses) and off-road. Marine diesel engine designs are a…

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Diesel Digest: Sailboat engines benefit from enhancements for megayachts

Diesel Digest: by Capt. Jeff Werner While the primary focus of the yachting industry is superyachts, vessels with an LOA in the 50-foot range also make up a good portion of…

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Diesel Digest: Understanding ultra low-sulfur diesel standards

Diesel Digest: by Capt. Jeff Werner In 1990, the U.S. Congress amended the Clean Air Act to require stricter reductions of air pollutants. These amendments included more stringent tailpipe emission…

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Diesel Digest: Hybrid propulsion helps yachts set course for a greener future

Diesel Digest: by Capt. Jeff Werner “AUGSBURG, Germany – Last year, the French submarine Aigrette was launched with diesel electric propulsion. MAN built the diesel engine for that underwater vessel.”…

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Diesel Digest: Diesel basics boil down to chemistry

Diesel Digest: by Capt. Jeff Werner The petroleum that is pumped out of the ground via an oil well is called crude oil. This crude can vary in color and…

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Diesel Digest: A primer on compression ignition engines

Diesel Digest: by Capt. Jeff Werner Rudolf Diesel envisioned a new type of engine, one that would replace the available steam and gasoline engines. In 1895, he perfected the breakthrough…

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