WinGD
X-DF
Low-pressure LNG dual-fuel two-stroke engines, in service since 2016, with pilot fuel below 1% of heat release.
Maritime Propulsion Products
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WinGD
X-DF-M
High-pressure methanol/ethanol dual-fuel engines; the X92DF-M delivers up to 77,400 kW.
WinGD
X-DF-A
Ammonia dual-fuel two-stroke engines; the X52DF-A powered EXMAR's ANTWERPEN, delivered in June 2026.
WinGD
X-DF-HP
High-pressure LNG dual-fuel engines in 82 and 92 cm bores for ultra-large container ships; first deliveries expected 2028.
Woodward
Marine governors & engine controls
Hydraulic-mechanical and electro-hydraulic governors and actuators controlling speed and load of marine diesel and dual-fuel engines.
Woodward
Large Engine Control Module (LECM)
Engine-mounted, marine-certified control module for gas, diesel and dual-fuel engines: speed/load, air-fuel ratio, injection and protection.
Yamaha Motor
XTO Offshore V8
5.6 L V8 direct-injection outboards of 425 and 450 hp; Helm Master EX compatible.
Yamaha Motor
V8/V6 Offshore & mid-range four-strokes
Four-stroke outboard range from 2.5 hp portables to the 350 hp V6 Offshore, plus V MAX SHO performance models.
Yamaha Motor
HARMO
Rim-drive electric propulsion unit with 48 V battery, 3.1 kW impeller shaft output, integrated with Helm Master EX.
Yamaha Motor
Torqeedo (subsidiary)
Electric outboards and inboards from Torqeedo, acquired from DEUTZ in 2024 and sold alongside Yamaha outboards.
Yanmar
EY series medium-speed engines
Medium-speed diesel engines for main propulsion (6EY17W to 8EY33W) and gensets (6EY18ALW to 8EY33LW) at 720–1,000 rpm.
Yanmar
EY dual-fuel engines
Dual-fuel medium-speed engines of 1,100–2,044 kW running on natural gas or MDO/HFO, IMO Tier III; methanol version in development.
Yanmar
Yanmar leisure diesels (JH, LV, LY, LF, LT)
Common-rail leisure diesels from 40 to 640 mhp for sailboats, sportboats and yachts, for shaft, sterndrive or sail-drive installation.
Yanmar
Yanmar commercial high-speed engines
High-speed commercial propulsion engines for fishing and workboats; 6AY series 555–670 kW (755–911 mhp) at 1,840–1,938 rpm.
Yanmar
Yanmar sailboat engines (GM / YM series)
Small auxiliary diesels for sailboats: 1GM10 (about 10 mhp) and YM series (15–30 mhp); HVO-approved.
Yichang Marine Diesel Engine
Everllence B&W 2-stroke engines
Licence-built small- and medium-bore B&W low-speed engines for bulkers, tankers and feeders.
Yichang Marine Diesel Engine
Mitsubishi-UE (UEC) engines
Licence-built Mitsubishi-UE (now J-ENG UEC) low-speed engines; the first 6UEC43LSII, of 6,300 kW at 160 rpm, was completed in 2010.
Yuchai Marine Power (YCMP)
Everllence B&W 2-stroke engines
Licence-built Everllence B&W low-speed engines, including dual-fuel versions, for deep-sea merchant ships.
Yuchai Marine Power (YCMP)
WinGD X / X-DF
Licence-built WinGD X and X-DF engines; YCMP started its first Wärtsilä X35 in 2011.
zepp.solutions
zepp.Y50 / zepp.X150
All-in-one PEM fuel cell modules; X150 delivers 150 kW net with integrated DC-DC, scalable to multi-MW.
zepp.solutions
Genset series (G240–G1000)
Containerised PEM fuel cell plus battery generator sets; G500 gives 500 kW peak and 300 kW continuous in a 10 ft container.
Zeppelin Power (Netherlands & Norway)
Cat & MaK propulsion packages
Caterpillar marine propulsion and auxiliary engines from about 70 kW to 6,500 kW, plus generators, batteries and hybrid packages.
Zeppelin Power (Netherlands & Norway)
Service & overhaul
Inspections, maintenance agreements, oil analysis, repairs and overhauls for Cat and MaK marine installations.