YanmarYanmar 6N21 / 6N21AL Series
Yanmar 6N21 Major Overhaul BOM (10,000hr Service)
Overhaul Kits
Engineer's Note: This list includes validated OEM part numbers for 10,000hr (Top End) and 20,000hr (Major) overhauls. Quantities are per single engine unit.
| Select | System | Part Name | OEM P/N | Qty |
|---|---|---|---|---|
| Power Pack | Cylinder Liner Assembly (6N21/6N18) | 746674-11713-C | 6 | |
| Power Pack | Piston Assembly (6N21 complete) | 129001-02970 | 6 | |
| Cylinder Head | Individual Cylinder Head Assembly | 746674-11710 | 6 | |
| Fuel System | Fuel Injector Nozzle (6N21) | YDLL-153348T90284 | 6 | |
| Fuel System | Fuel Injection Pump (Bosch Type) | 748606-51843 | 1 | |
| Electrical | Starting Air Valve Assembly | 127610-33000 | 1 | |
| Gaskets | Complete Overhaul Gasket Set | 746674-02020 | 1 | |
| Anodes | Pencil Anode (Large 20x55mm) | 27210-200550 | 6 | |
| Cooling | Seawater Pump Impeller | 124223-42092 | 1 |