Listed gear-ratio data for 2006 Yamaha 40 HP outboards. Match your exact model and lower unit; some models may have more than one gearcase configuration.
2006 Yamaha 40 HP
Listed ratio values: 1.85:1, 2.00:1
| Model | Gear ratio |
|---|---|
| 40TLR | 1.85:1 |
| F40MLH | 2.00:1 |
| F40MSH | 2.00:1 |
| F40TLR | 2.00:1 |
Use the ratio that matches your exact outboard model and lower unit, then enter it in the PropSlip calculator.