Yanmar N18 Crankshaft
Mega Marine supplies genuine and reconditioned crankshaft for Yanmar N18 marine engines, along with complete engines and a comprehensive range of spare parts. Fast RFQ response and global delivery.
The crankshaft is the backbone of a marine diesel engine, converting reciprocating piston motion into the rotational power delivered to the propeller shaft. In large 2-stroke crosshead engines, the crankshaft is a massive semi-built assembly running the full length of the engine block, precision-machined from forged alloy steel to extremely close tolerances.
Function in the Engine
Converts linear piston motion to rotational output, transmits power through main bearings to the propulsion train, drives the camshaft via timing gears, and maintains engine balance through counterweights.
About the Yanmar N18
Yanmar N-series 180mm bore medium-speed engine for propulsion and auxiliary applications in smaller commercial vessels.
Common Issues Requiring Replacement
Journal wear at main and crankpin bearing surfaces, cracking at fillet radii under high cyclic loading, deflection and misalignment causing uneven bearing loading, surface corrosion from contaminated lubricating oil.
Mega Marine supplies genuine OEM and quality reconditioned crankshaft for Yanmar N18 engines, with full traceability and global shipping to any port worldwide. We respond to quote requests within 4–6 hours.
- Engine Brand
- Yanmar
- Engine Model
- N18
- Part Category
- Crankshaft
- Condition
- Genuine & Reconditioned
Browse the full N18 parts range.
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