| # | Swimmer | Team | Seed | Time | Diff |
| 1 |
Charnou, Maksim (11)
|
FGNMST |
1:27.02 |
1:22.54 |
-4.48 |
| 2 |
Franchak, Lucas S (11)
|
FGCANE |
1:26.24 |
1:22.94 |
-3.30 |
| 3 |
Grenier, Michael * (11)
|
FGCANE |
1:29.99 |
1:26.34 |
-3.65 |
| 4 |
Echeverria, Giancarlo * (11)
|
FGMACM |
|
1:28.10 |
- |
| 5 |
Gonzalez, Daniel (12)
|
FGASC |
|
1:29.07 |
- |
| 6 |
Fernandez, Eduardo P (12)
|
FGUNRA |
1:33.79 |
1:31.26 |
-2.53 |
| 7 |
Fachetti-Carvhalo, Gabriel (12)
|
FGASC |
1:46.26 |
1:43.44 |
-2.82 |
| 8 |
Blanca, Luis F (11)
|
FGMACM |
|
1:54.95 |
- |
|
Verdi, Luca L (11)
|
FGCANE |
|
DQ |
- |
|
Kassin, Roberto J (12)
|
FGMCDA |
|
NS |
- |
|
Gonzalez, Nicolas (12)
|
FGUNRA |
1:26.16 |
NS |
- |