Listed gear-ratio data for 2004 Yamaha 25 HP outboards. Match your exact model and lower unit; some models may have more than one gearcase configuration.
2004 Yamaha 25 HP
Listed ratio values: 2.08:1, 2.42:1
| Model | Gear ratio |
|---|---|
| 25MSHC | 2.08:1 |
| F25ELHC | 2.08:1 |
| F25ELRC | 2.08:1 |
| F25ESHC | 2.08:1 |
| F25ESRC | 2.08:1 |
| F25MLHC | 2.08:1 |
| F25MSHC | 2.08:1 |
| F25TLRC | 2.08:1 |
| T25TLRC | 2.42:1 |
Use the ratio that matches your exact outboard model and lower unit, then enter it in the PropSlip calculator.