Listed gear-ratio data for 2002 Mercury 25 HP BigFoot FourStroke outboards. Match your exact model and lower unit; some models may have more than one gearcase configuration.
2002 Mercury 25 HP BigFoot FourStroke
Listed ratio values: 2.40:1
| Model | Gear ratio |
|---|---|
| 1999-2003 | 2.40:1 |
Use the ratio that matches your exact outboard model and lower unit, then enter it in the PropSlip calculator.