Listed gear-ratio data for 2010 Yamaha 25 HP outboards. Match your exact model and lower unit; some models may have more than one gearcase configuration.
2010 Yamaha 25 HP
Listed ratio values: 2.08:1, 2.42:1
| Model | Gear ratio |
|---|---|
| 25ELH | 2.08:1 |
| 25ELR | 2.08:1 |
| 25ESH | 2.08:1 |
| 25MLH | 2.08:1 |
| 25MSH | 2.08:1 |
| F25LA | 2.08:1 |
| F25LEA | 2.08:1 |
| F25LEHA | 2.08:1 |
| F25LMHA | 2.08:1 |
| F25SEA | 2.08:1 |
| F25SEHA | 2.08:1 |
| F25SMHA | 2.08:1 |
| T25LA | 2.42:1 |
Use the ratio that matches your exact outboard model and lower unit, then enter it in the PropSlip calculator.