The ship engine works by converting fuel combustion into mechanical energy, driving the propeller through a crankshaft and transmission system. Key parts include the cylinder block, pistons, crankshaft, fuel injectors, and cooling system. The engine operates on a four-stroke or two-stroke cycle, depending on the design.

Ship Engine Working Principle: Typically operates on the diesel cycle (compression ignition), converting chemical energy from fuel into mechanical energy via combustion.

Engine Parts: Includes cylinder block, pistons, crankshaft, camshaft, connecting rods, fuel injectors, turbocharger, cooling system, lubrication system, and exhaust system.

Size: Varies from small (500 kW) to very large (over 80 MW) depending on ship type (e.g., cargo, tanker, or cruise ship).

Grade: Marine diesel engines use heavy fuel oil (HFO) or marine gas oil (MGO) with grades like RMG 180, RMG 380, or DMA.

Viscosity: HFO viscosity ranges from 180 cSt to 700 cSt at 50°C, requiring preheating for proper combustion.

Buoyancy: Not directly applicable to engines, but engine weight affects ship displacement and stability.

Material: Cylinder blocks are made of cast iron or steel; pistons use aluminum alloys; crankshafts are forged steel; liners are often chrome-plated.