| Item | Part No. | Part Name | Qty | Serial No. |
| 6271-21-1000 | Cylinder Block Assembly | 521394- | ||
| 1 | Block, Cylinder, Cylinder | 550247- | ||
| Block, Cylinder, Cylinder | 521394-550246 | |||
| 2 | 6204-29-1210 | Cap, Main Metal, No.1,2,3,4 | 521394- | |
| 3 | 6204-29-1220 | Cap, Main Metal, No.5 | 521394- | |
| 4 | 6204-21-1610 | Bolt, Main Cap | 521394- | |
| 5 | 6141-21-1530 | Ring, Dowel | 521394- | |
| 6 | 6206-21-1430 | Bushing, Camshaft | 521394- | |
| 7 | 6206-21-1420 | Bushing, Camshaft | 521394- | |
| 8 | 07046-42216 | Plug | 521394- | |
| 9 | 07046-42516 | Plug | 521394- | |
| 10 | 07046-43016 | Plug | 521394- | |
| 11 | 07046-44016 | Plug | 521394- | |
| 12 | 07042-70312 | Plug | 521394- | |
| 13 | 6215-81-9710 | O-ring | 521394- | |
| 14 | 6215-81-9510 | Plug | 521394- | |
| 15 | 6204-51-1711 | Bushing, Oil Pump | 521394- | |
| 16 | 6140-21-1130 | Bushing, Dowel | 521394- | |
| 17 | 04020-00820 | Pin, Dowel | 521394- | |
| 18 | 04020-01228 | Pin, Dowel, Dowel | 521394- | |
| 19 | 04025-00408 | Pin, Spring | 521394- | |
| 20 | 07046-41810 | Plug | 521394- | |
| 21 | 07043-70108 | Plug | 521394- | |
| 22 | 6136-52-1620 | Pin, Dowel, Oil Pump | 521394- | |
| 23 | 6204-51-1620 | Shaft, Oil Pump | 521394- | |
| 24 | 6207-21-1190 | Pin | 521394- |