Listed gear-ratio data for 2001 Mercury 15 HP Marathon XD outboards. Match your exact model and lower unit; some models may have more than one gearcase configuration.
2001 Mercury 15 HP Marathon XD
Listed ratio values: 2.25:1
| Model | Gear ratio |
|---|---|
| 0P017000-0P325499 | 2.25:1 |
Use the ratio that matches your exact outboard model and lower unit, then enter it in the PropSlip calculator.