| Engine name | manufacturer | configuration | cylinders |
|---|---|---|---|
| Mercury 31 | Bristol | Radial | 9 |
| Mercury I | Bristol | Radial | 9 |
| Mercury II | Bristol | Radial | 9 |
| Mercury IIA | Bristol | Radial | 9 |
| Mercury III | Bristol | Radial | 9 |
| Mercury IIIA | Bristol | Radial | 9 |
| Mercury IV | Bristol | Radial | 9 |
| Mercury IVA | Bristol | Radial | 9 |
| Mercury IVS.2 | Bristol | Radial | 9 |
| Mercury IX | Bristol | Radial | 9 |
| Mercury V | Bristol | Radial | 9 |
| Mercury VIA | Bristol | Radial | 9 |
| Mercury VIIA | Bristol | Radial | 9 |
| Mercury VIII | Bristol | Radial | 9 |
| Mercury VIIIA | Bristol | Radial | 9 |