The Mitsubishi S12A2-Y1PTA-1 is a 33.93 L 12-cylinder turbocharged w/aftercooler engine rated at 1800 rpm, producing up to 900 kW. It powers generator sets from Kohler and Simson-Maxwell, including the 800ROZMC and SMW800 T6-T1. It holds 120 L (31.7 gal) of oil and 100 L (26.4 gal) of coolant.
Also known as: Mitsubishi Heavy Industries, Ltd. S12A2-Y1PTA-1
Part of the Mitsubishi S12A2-Y1PTA engine family — 2 variants share parts & fitment.
| Oil capacity | 120.0 L |
|---|---|
| Coolant capacity | 100.0 L |
| Displacement | 33.93 L |
| Cylinders | 12 |
| Aspiration | turbocharged w/aftercooler |
| Rated speed | 1800 rpm |
| Gross power | 900 kW |
Shared across brands: Kohler, Simson-Maxwell
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Fuel filter | Cartridge | — | |||
| Oil filter | Cartridge | — | |||
| Coolant | 100.0 L | — | |||
| Oil | 120.0 L | — |
Pooled from every document that names this exact engine — confirm the interval and part number against your unit's serial number.
| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Other | 10 in. weld flange bolt circle diameter B | 361.95 | mm (14.25 in.) | |
| Other | 10 in. weld flange outside diameter C | 406.4 | mm (16.0 in.) | |
| Other | 10 in. weld flange quantity of bolts / bolt hole diameter D | 12, 25.40 | mm (1.00 in.) | |
| Other | 12 in. weld flange bolt circle diameter B | 431.80 | mm (17.00 in.) | |
| Other | 12 in. weld flange outside diameter C | 482.6 | mm (19.0 in.) | |
| Other | 12 in. weld flange quantity of bolts / bolt hole diameter D | 12, 25.40 | mm (1.00 in.) | |
| Other | 14 in. weld flange bolt circle diameter B | 476.25 | mm (18.75 in.) | |
| Other | 14 in. weld flange outside diameter C | 533.4 | mm (21.0 in.) | |
| Other | 14 in. weld flange quantity of bolts / bolt hole diameter D | 12, 28.58 | mm (1.13 in.) | |
| Other | 16 in. weld flange bolt circle diameter B | 539.75 | mm (21.25 in.) | |
| Other | 16 in. weld flange outside diameter C | 596.9 | mm (23.5 in.) | |
| Other | 16 in. weld flange quantity of bolts / bolt hole diameter D | 16, 28.58 | mm (1.13 in.) | |
| Other | 18 in. weld flange bolt circle diameter B | 577.85 | mm (22.75 in.) | |
| Other | 18 in. weld flange outside diameter C | 635.0 | mm (25.0 in.) | |
| Other | 18 in. weld flange quantity of bolts / bolt hole diameter D | 16, 31.75 | mm (1.25 in.) | |
| Other | 20 in. weld flange bolt circle diameter B | 635.00 | mm (25.00 in.) | |
| Other | 20 in. weld flange outside diameter C | 698.5 | mm (27.5 in.) | |
| Other | 20 in. weld flange quantity of bolts / bolt hole diameter D | 20, 31.75 | mm (1.25 in.) | |
| Other | 5 in. weld flange bolt circle diameter B | 215.90 | mm (8.50 in.) | |
| Other | 5 in. weld flange outside diameter C | 241.30 | mm (9.50 in.) | |
| Other | 5 in. weld flange quantity of bolts / bolt hole diameter D | 8, 22.23 | mm (0.88 in.) | |
| Other | 6 in. weld flange bolt circle diameter B | 254.0 | mm (10.0 in.) | |
| Other | 6 in. weld flange outside diameter C | 279.4 | mm (11.0 in.) | |
| Other | 6 in. weld flange quantity of bolts / bolt hole diameter D | 8, 22.23 | mm (0.88 in.) | |
| Other | 8 in. weld flange bolt circle diameter B | 298.45 | mm (11.75 in.) | |
| Other | 8 in. weld flange outside diameter C | 342.9 | mm (13.5 in.) | |
| Other | 8 in. weld flange quantity of bolts / bolt hole diameter D | 8, 22.23 | mm (0.88 in.) | |
| Other | Weld flange angle A (10, 12, 14 in. nominal pipe size) | 30 | deg. | |
| Other | Weld flange angle A (16, 18, 20 in. nominal pipe size) | 22.5 | deg. | |
| Other | Weld flange angle A (5, 6, 8 in. nominal pipe size) | 45 | deg. |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
| Part # | Description | Category |
|---|---|---|
| 37594-01300 | ThreeBond 1211 liquid gasket | gasket |
| 32561-67600 | Nozzle tip | injector |
| 32561-76050 | Injection Nozzle assy | injector |
| 32665-22040 | Injection pump Left | pump |
| 32665-31040 | Injection pump Right | pump |
| 04410-43400 | Rotation pickup | sensor |
| 37592-01400 | Supply air pressure sensor | sensor |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.
The Mitsubishi S12A2-Y1PTA-1 engine has an oil capacity of 120.0 liters.
The Mitsubishi S12A2-Y1PTA-1 has a displacement of 33.93 liters with 12 cylinders.
The Mitsubishi S12A2-Y1PTA-1 powers 2 generator set(s), including Kohler 800ROZMC, Simson-Maxwell SMW800 T6-T1.