Heat 12
mercredi 26 juillet 2017, 09h43 GMT – 09h43 GMT
| Nom | Équipe | Temps | |
|---|---|---|---|
| 1 |  Cameron McEvoy | Australia | 47.97″ |
| 2 |  Jack Cartwright | Australia | + 0.46″ |
| 3 | Duncan Scott | Great Britain | + 0.49″ |
| 4 |  Yuri Kisil | Canada | + 0.59″ |
| 5 | Gabriel Santos | Brazil | + 0.67″ |
| 6 |  Velimir Stjepanovic | Serbia | + 0.83″ |
| 7 |  Dominik Kozma | Hungary | + 0.92″ |
| 8 |  Katsumi Nakamura | Japan | + 1.13″ |
| 9 | Hanser Garcia | Cuba | + 1.36″ |
| 10 |  Marius Radu | Romania | + 1.89″ |