Listed gear-ratio data for 2005 Yamaha 25 HP outboards. Match your exact model and lower unit; some models may have more than one gearcase configuration.
2005 Yamaha 25 HP
Listed ratio values: 2.08:1, 2.42:1
| Model | Gear ratio |
|---|---|
| 25MSHD | 2.08:1 |
| F25ELHD | 2.08:1 |
| F25ELRD | 2.08:1 |
| F25ESHD | 2.08:1 |
| F25ESRD | 2.08:1 |
| F25MLHD | 2.08:1 |
| F25MSHD | 2.08:1 |
| F25TLRD | 2.08:1 |
| T25TLRD | 2.42:1 |
Use the ratio that matches your exact outboard model and lower unit, then enter it in the PropSlip calculator.