Listed gear-ratio data for 2017 Mariner 30 HP outboards. Match your exact model and lower unit; some models may have more than one gearcase configuration.
2017 Mariner 30 HP
Listed ratio values: 1.92:1
| Model | Gear ratio |
|---|---|
| F30 EFI FourStroke - 526 cc generation | 1.92:1 |
Use the ratio that matches your exact outboard model and lower unit, then enter it in the PropSlip calculator.