Quick answer
This page uses a published test for Sea Ray SLX-R 350 with 2 × Mercury 450R. In that table, the best published economy point is around 2.9 kn and 6.1 L/h.
Engine/configuration: 2 × Mercury 450R
Source: manufacturer test
Source: manufacturer test
Published fuel-burn table
| Speed kn | Fuel L/h | L/nm |
|---|---|---|
| 2.9 | 6.1 | 2.11 |
| 5.6 | 13.2 | 2.38 |
| 7.7 | 25.7 | 3.33 |
| 9.1 | 38.2 | 4.19 |
| 13.1 | 51.9 | 3.95 |
| 18.9 | 70 | 3.7 |
| 27.1 | 79.5 | 2.93 |
| 31.8 | 98 | 3.08 |
| 36.1 | 123.4 | 3.41 |
| 40.6 | 160.5 | 3.96 |
| 45 | 209.3 | 4.65 |
| 49.9 | 270.3 | 5.42 |
| 56 | 330.8 | 5.91 |
Calculate cost per mile
Use the calculator and change the fuel price. If you choose this boat in the picker, SkipperCalc adjusts fuel burn inside the tested speed range.