Listed gear-ratio data for 2002 Yamaha 25 HP outboards. Match your exact model and lower unit; some models may have more than one gearcase configuration.
2002 Yamaha 25 HP
Listed ratio values: 1.85:1, 2.08:1, 2.42:1
| Model | Gear ratio |
|---|---|
| 25MSHA | 2.08:1 |
| 25MSHA3 | 1.85:1 |
| F25ELHA | 2.08:1 |
| F25ELRA | 2.08:1 |
| F25ESHA | 2.08:1 |
| F25ESRA | 2.08:1 |
| F25MLHA | 2.08:1 |
| F25MSHA | 2.08:1 |
| F25TLRA | 2.08:1 |
| T25TLRA | 2.42:1 |
Use the ratio that matches your exact outboard model and lower unit, then enter it in the PropSlip calculator.