Listed gear-ratio data for 1998 Yamaha 15 HP outboards. Match your exact model and lower unit; some models may have more than one gearcase configuration.
1998 Yamaha 15 HP
Listed ratio values: 2.08:1
| Model | Gear ratio |
|---|---|
| 15MLHW | 2.08:1 |
| 15MSHW | 2.08:1 |
| F15ELHW | 2.08:1 |
| F15ESHW | 2.08:1 |
| F15MLHW | 2.08:1 |
| F15MSHW | 2.08:1 |
Use the ratio that matches your exact outboard model and lower unit, then enter it in the PropSlip calculator.