6N21L
The Yanmar 6N21L is a medium‑speed, vertical inline 6‑cylinder diesel engine delivering up to 1500 kW at 900 rpm, primarily used as an auxiliary generator on merchant vessels.
Engine Specifications
Other Cylinder Configurations 8
Components & Design
Component data being added…
Technical Data
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Common failures & inspection points
Inspect turbo seals, measure boost pressure, check intercooler for oil contamination
Check fuel cleanliness, inspect injector nozzles for sludge, verify water separator function
Check zinc anode wear, inspect cooler for corrosion pitting, examine cylinder head flange
Measure crankshaft runout/ovality, visual crack inspection, check bearing clearances
Oil analysis for viscosity/water content, inspect oil cooler, verify change interval compliance
Type-general inspection and maintenance points for this equipment category — not model-specific.
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