Listed gear-ratio data for 1997 Yamaha 20 HP outboards. Match your exact model and lower unit; some models may have more than one gearcase configuration.
1997 Yamaha 20 HP
Listed ratio values: 2.08:1
| Model | Gear ratio |
|---|---|
| 20MLHV | 2.08:1 |
| 20MSHV | 2.08:1 |
Use the ratio that matches your exact outboard model and lower unit, then enter it in the PropSlip calculator.