| Final | time | | 1. Jaime Aparicio Rodewaldt |  Colombia | 53.4s | | 2. Wilson Gomes Carneiro |  Brazil | 53.7s | | 3. Don Halderman |  United States | 54.5s | | 4. Reinaldo Martin Muller |  Chile | 55.2s | | 5. Eduardo Laca |  Peru | | | 6. Samuel Anderson Schweyer |  Cuba | |
|
|
| Heat 1 | time | | 1. Don Halderman | United States | 53.4s | | 2. Reinaldo Martin Muller | Chile | 54.3s | | 3. Ernesto Igler |  Argentina | 55.1s | | 4. Carlos Monges Caldera |  Mexico | 56.4s |
|
|
| Heat 2 | time | | 1. Wilson Gomes Carneiro | Brazil | 54.9s | | 2. Samuel Anderson Schweyer | Cuba | 55.4s | | 3. Jorn Gevert | Chile | 55.4s | | 4. Ernesto Rogg | Argentina | 56.6s | | -. Richard Attlesey | United States | DNS |
|
|
|
| Heat | time 3. | | 1. Jaime Aparicio Rodewaldt | Colombia | No Time | | 2. Eduardo Laca | Peru | No Time | | 3. Arturo Kuntze | Argentina | No Time | | 4. Udo Martin Huber | Chile | No Time |
|
|
| 
