The MAN B&W L21/31 is a compact and reliable four-stroke diesel engine designed for marine propulsion and power generation applications. Renowned for its efficiency, durability, and easy maintenance, the L21/31 delivers low fuel consumption, reduced emissions, and full compliance with IMO environmental regulations.

With its robust design and advanced engineering, the L21/31 ensures long-term operational reliability and optimal performance under demanding conditions. Its sustainability and cost-effectiveness make it a trusted solution for shipowners and operators seeking proven performance and extended engine life.

Yalova Marine Services supplies a complete range of OEM-quality and alternative spare parts for the MAN B&W L21/31 engine — available for fast worldwide delivery to shipowners, shipyards, and service companies.

Main Spare Parts We Supply

• Cylinder Head

• Piston

• Piston Rings

• Connecting Rod

• Cylinder Liner

• Water Guide Jacket

• Bearings, Rollers, Bushings, Sleeves

• Turbine Starters

• Filters

• Pneumatic Valves

• Camshaft / Crankshaft / Engine Frame / Vibration Damper