Listed gear-ratio data for 1999 Yamaha 250 HP outboards. Match your exact model and lower unit; some models may have more than one gearcase configuration.
1999 Yamaha 250 HP
Listed ratio values: 1.81:1
| Model | Gear ratio |
|---|---|
| L250TURX | 1.81:1 |
| L250TXRX | 1.81:1 |
| S250TURX | 1.81:1 |
| S250TXRX | 1.81:1 |
Use the ratio that matches your exact outboard model and lower unit, then enter it in the PropSlip calculator.