Listed gear-ratio data for 2009 Nissan 25 HP outboards. Match your exact model and lower unit; some models may have more than one gearcase configuration.
2009 Nissan 25 HP
Listed ratio values: 1.92:1, 2.17:1
| Model | Gear ratio |
|---|---|
| NS25H | 1.92:1 |
| NSF25B | 2.17:1 |
Use the ratio that matches your exact outboard model and lower unit, then enter it in the PropSlip calculator.