6LH25/33 DF
The HiMSEN 6LH25/33 DF is a medium‑speed, six‑cylinder, dual‑fuel (LNG/HFO) trunk‑piston marine engine delivering up to 1 620 kW at 720 rpm, designed for main propulsion on small‑to‑medium sized vessels.
Engine Specifications
Components & Design
Component data being added…
Technical Data
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Common failures & inspection points
Inspect fuel pump drain line connection for flow blockage during operation; verify fuel viscosity maintained at 2-14 cSt at engine inlet; check for fuel sludge deposits in drain hole and barrel groove
Inspect turbocharger for deposit buildup on turbine blades; examine exhaust valve surfaces and combustion chamber for carbon deposits; verify L.O (lubricating oil) specification matches fuel sulphur content per manufacturer list
Monitor piston ring clearance and condition; inspect main bearing cap studs for looseness after each overhaul; verify hydraulic tightening force applied to underslung crankshaft support studs
Verify MGO temperature maintained at ~22°C to achieve 2 cSt viscosity; check fuel heater function for cold climate operation; test actual fuel viscosity at engine inlet before commissioning
Monitor boost pressure trending; inspect turbocharger exhaust seal condition during regular intervals; check compressor and turbine blade condition for foreign object damage; verify turbo oil supply/drain lines clear of sludge
Type-general inspection and maintenance points for this equipment category — not model-specific.
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