Listed gear-ratio data for 2005 Yamaha 9.9 HP outboards. Match your exact model and lower unit; some models may have more than one gearcase configuration.
2005 Yamaha 9.9 HP
Listed ratio values: 2.08:1, 2.92:1
| Model | Gear ratio |
|---|---|
| 9.9MSHD | 2.08:1 |
| F9.9ELR2D | 2.08:1 |
| F9.9MLH2D | 2.08:1 |
| F9.9MSH2D | 2.08:1 |
| T9.9ELH2D | 2.92:1 |
| T9.9ELR2D | 2.92:1 |
| T9.9EXH2D | 2.92:1 |
Use the ratio that matches your exact outboard model and lower unit, then enter it in the PropSlip calculator.