Bore, stroke, displacement and compression for all 4 Mercury Thriftpower Six engines. Compare variants side by side.
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| 250 | 250 ci | 3.6811" × 3.9094" | 9:1 | 155 |
| 200 | 200 ci | 3.6811" × 3.1299" | 8.5:1 | 120 |
| 170 | 170 ci | 3.5" × 2.9409" | 8.7:1 | 101 |
| 144 | 144 ci | 3.5" × 2.5" | 8.7:1 | 85 |