Listed gear-ratio data for 2004 Yamaha 15 HP outboards. Match your exact model and lower unit; some models may have more than one gearcase configuration.
2004 Yamaha 15 HP
Listed ratio values: 2.08:1
| Model | Gear ratio |
|---|---|
| 15MSHC | 2.08:1 |
| F15ELHC | 2.08:1 |
| F15ESHC | 2.08:1 |
| F15MLHC | 2.08:1 |
| F15MSHC | 2.08:1 |
| F15PLHC | 2.08:1 |
| F15PLRC | 2.08:1 |
Use the ratio that matches your exact outboard model and lower unit, then enter it in the PropSlip calculator.