Listed gear-ratio data for 2003 Yamaha 25 HP outboards. Match your exact model and lower unit; some models may have more than one gearcase configuration.
2003 Yamaha 25 HP
Listed ratio values: 2.08:1, 2.42:1
| Model | Gear ratio |
|---|---|
| 25MSHB | 2.08:1 |
| F25ELHB | 2.08:1 |
| F25ELRB | 2.08:1 |
| F25ESHB | 2.08:1 |
| F25ESRB | 2.08:1 |
| F25MLHB | 2.08:1 |
| F25MSHB | 2.08:1 |
| F25TLRB | 2.08:1 |
| T25TLRB | 2.42:1 |
Use the ratio that matches your exact outboard model and lower unit, then enter it in the PropSlip calculator.