HD Hyundai Marine Engine
Turbochargers and crankshafts
Licensed turbochargers for two- and four-stroke engines (Everllence since 1986, MHI since 2011, Accelleron from 2024) and engine crankshafts.
Maritime Propulsion Products
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HD Korea Shipbuilding & Offshore Engineering (KSOE)
SMR-powered container ship design
SMR-powered container ship concepts: a 15,000 TEU design with ABS AiP (2025) and a 16,000 TEU nuclear-electric propulsion JDP with ABS (2026).
Heinzmann
Heinzmann digital governors & actuators
Digital and hydraulic governors, actuators and ECUs for marine diesel, gas and dual-fuel engines up to several thousand kW.
Hengli Engine (Dalian)
Everllence B&W two-stroke engines
Licence-built B&W low-speed engines incl. an 8G95 LNG DF unit (74,725 hp) delivered April 2026 and LPG dual-fuel engines.
Hidea
Hidea carburettor outboards
Carburettor four-stroke outboards from 2.5 to 20 hp with tiller or remote control.
Hidea
Hidea EFI outboards
Electronic fuel injection four-stroke outboards from 20 to 150 hp with ECM ignition.
Hitachi Zosen Marine Engine (HZME)
Everllence B&W 2-stroke engines
Licence-built Everllence (MAN) B&W low-speed diesel and dual-fuel main engines for Japanese-built merchant ships.
Hitachi Zosen Marine Engine (HZME)
WinGD X / X-DF engines
Licence-built WinGD low-speed diesel and dual-fuel engines, including X-DF LNG engines.
Honda Marine
Honda BF four-stroke range
Four-stroke petrol outboards from 2.3 to 350 hp in portable, mid-range, high-power and jet-drive versions.
Honda Marine
Honda electric outboard
Electric propulsion under development; a 5 hp (about 4 kW) system was in pilot testing in Japan in 2024.
Honda Marine
Honda BF350
Flagship 350 hp, 4,952 cc SOHC 60° V8 four-stroke outboard with BLAST spark-advance system.
Hudong Heavy Machinery (HHM)
WinGD X / X-DF engines
Licence-built WinGD X diesel and X-DF dual-fuel low-speed engines.
Hudong Heavy Machinery (HHM)
Everllence B&W ME-C / ME-GI / ME-GIE / ME-LGIM / ME-LGIP
Licence-built B&W engines incl. LNG, ethane, methanol and LPG dual-fuel types first delivered by HHM in 2025.
Hundested Propeller
Hundested CPP
Made-to-order controllable-pitch propeller systems, about 150–4,500 hp and 750–4,000 mm diameter, with gearboxes and controls.
Hydromaster
Hydromaster azimuth thrusters
Compact 360-degree azimuth thrusters in well-, transom- and deck-mounted versions, Z- or L-drive, for diesel, electric, hydraulic or hybrid drive.
Hydromaster
Hydromaster tunnel and swing-type side thrusters
Tunnel thrusters with electric, hydraulic or engine drive and large reduction ratios, plus swing-type side thrusters for superyachts.
Hydromaster
Hydromaster retractable thrusters
Bow-mounted thrusters that lower below the hull for manoeuvring and station-keeping and retract flush when not in use; some steer through 360 degrees.
Hydromaster
Hydromaster high-speed thrusters
Well-mounted azimuth thrusters designed for faster vessels operating up to about 28-30 knots.
IHI Corporation
LM2500 / LM2500IEC (licence)
GE LM2500-series two-shaft gas turbines built and packaged by IHI under GE licence for JMSDF destroyers and land applications.
IHI Power Systems (Niigata)
Niigata 28AHX
Medium-speed propulsion diesel, 2,220-6,660 kW at 800 rpm, 280 mm bore, in 6 to 18-cylinder versions.
IHI Power Systems (Niigata)
Niigata 17AHX
Compact medium-speed diesel, 500-1,125 kW at 900-1,200 rpm, in 5 to 9-cylinder in-line versions.
IHI Power Systems (Niigata)
Niigata 28AHX-DF / 28ADF
28 cm-bore dual-fuel engines: LNG dual-fuel 28AHX-DF for tugs and coastal ships, and the ammonia dual-fuel 28ADF developed in 2024.
IHI Power Systems (Niigata)
Niigata HX series
Medium-speed marine diesels from 761 kW (6MG19HX) to 4,552 kW (6MG41HX), 520-1,000 rpm.
IHI Power Systems (Niigata)
Everllence 4-stroke (licensed)
Everllence (MAN) four-stroke engines built under licence by IHI Power Systems.