Listed gear-ratio data for 2005 Mercury 50 HP EFI 2-Stroke outboards. Match your exact model and lower unit; some models may have more than one gearcase configuration.
2005 Mercury 50 HP EFI 2-Stroke
Listed ratio values: 1.83:1
| Model | Gear ratio |
|---|---|
| 0P153500-0P400999 | 1.83:1 |
| 0T409000-1B355222 | 1.83:1 |
Use the ratio that matches your exact outboard model and lower unit, then enter it in the PropSlip calculator.