The engine parts of a ship include the main components like the crankshaft, pistons, and cylinders that convert fuel into mechanical energy.

Supporting parts such as the fuel injectors, turbochargers, and cooling systems ensure efficient operation and performance.

Additional elements like the gearbox, propeller shaft, and exhaust system transmit power and manage emissions.

Engine Parts of Ship:

- Size: Varies by engine type (e.g., piston diameter 200mm–1000mm, crankshaft length 2m–10m)

- Grade: Marine-grade steel (ASTM A572, ASTM A36), cast iron (GG25, GG30), bronze (C95800)

- Viscosity: Lubricating oil SAE 30–50, hydraulic oil ISO VG 32–68

- Buoyancy: Not applicable (engine parts are non-buoyant, secured within hull)

- Material: Steel alloys, aluminum alloys, titanium (for high-stress components)

Engine Parts (General):

- Size: Piston (50mm–500mm), bearings (10mm–300mm), valves (20mm–200mm)

- Grade: SAE 1045 (shafts), SAE 4140 (gears), ASTM A276 (stainless steel valves)

- Viscosity: Engine oil SAE 5W-30 to 20W-50, gear oil SAE 75W-90

- Buoyancy: Negligible (components are dense metals)

- Material: Cast iron, forged steel, brass, polymer composites (gaskets, seals)