| Final | 19:37 | time | | gap | L | | 1. |  United States | 7:00.24 | | | 4 | 1. | | | Drew Kibler 1:45.54, Carson Foster 1:45.04, Trenton Julian 1:45.31, Kieran Smith 1:44.35 | | 2. |  Australia | 7:03.50 | | | 8 | 2. | | | Elijah Winnington 1:45.83, Zac Incerti 1:45.51, Samuel Short 1:46.44, Mack Horton 1:45.72 | | 3. |  Great Britain | 7:04.00 | | | 7 | 3. | | | James Guy 1:46.31, Jacob Whittle 1:46.80, Joe Litchfield 1:47.36, Tom Dean 1:43.53 | | 4. |  Brazil | 7:04.69 | SA | | 5 | 4. | | | Fernando Scheffer 1:45.52, Vinicius Assunção 1:46.44, Murilo Sartori 1:46.34, Breno Correia 1:46.39 | | 5. |  Hungary | 7:06.27 | | | 3 | 5. | | | Richárd Márton 1:48.12, Nándor Németh 1:45.73, Balázs Holló 1:47.74, Kristóf Milák 1:44.68 | | 6. |  South Korea | 7:06.93 | | | 6 | 6. | | | Hwang Sun-woo 1:45.30, Kim Woo-min 1:46.57, Lee Yoo-yeon 1:48.28, Lee Ho-joon 1:46.78 | | 7. |  France | 7:08.78 | | | 1 | 7. | | | Jordan Pothain 1:48.41, Léon Marchand 1:47.59, Roman Fuchs 1:46.27, Hadrien Salvan 1:46.51 | | 8. |  China | 7:10.93 | | | 2 | 8. | | | Hong Jinquan 1:47.74, Zhang Ziyang 1:47.95, Chen Juner 1:49.53, Pan Zhanle 1:45.71 |
| 61 Competitors from 14 Nations. | | World and Championship Record: United States 6:58.55 Rome, Italy 31 July 2009 |
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Heats - Thursday, 23rd July 10:13 | | Best 8 times advanced to Final. |
| Heat 2 | | time | | gap | L | Rk. | | 1. | United States | 7:04.39 | Q | | 5 | 1. | | | Carson Foster 1:45.62, Trey Freeman 1:46.91, Coby Carrozza 1:46.22, Trenton Julian 1:45.64 | | 2. | Brazil | 7:06.98 | Q, Sa | | 6 | 2. | | | Fernando Scheffer 1:46.33, Vinicius Assunção 1:46.81, Murilo Sartori 1:47.11, Breno Correia 1:46.73 | | 3. | Great Britain | 7:09.76 | Q | | 4 | 6. | | | Tom Dean 1:46.71, Matthew Richards 1:48.21, Joe Litchfield 1:47.36, Jacob Whittle 1:47.48 | | 4. | France | 7:09.95 | Q | | 3 | 7. | | | Jordan Pothain 1:47.99, Hadrien Salvan 1:46.55, Roman Fuchs 1:46.97, Enzo Tesic 1:48.44 | | 5. |  Israel | 7:12.70 | | | 2 | 10. | | | Denis Loktev 1:48.74, Bar Soloveychik 1:48.53, Daniel Namir 1:47.55, Gal Cohen Groumi 1:47.88 | | 5. |  Canada | 7:18.34 | | | 1 | 11. | | | Ruslan Gaziev 1:48.57, Finlay Knox 1:48.48, Jeremy Bagshaw 1:49.23, Patrick Hussey 1:52.06 | | 6. |  Singapore | 7:20.31 | | | 7 | 12. | | | Glen Lim Jun Wei 1:50.64, Ardi Mohamed Azman 1:49.69, Jonathan Tan 1:51.31, Quah Zheng Wen 1:48.67 |
| Heat 1 | | time | | gap | L | Rk. | | 1. | Hungary | 7:07.46 | Q | | 3 | 3. | | | Richárd Márton 1:46.52, Nándor Németh 1:47.17, Balázs Holló 1:47.03, Kristóf Milák 1:46.74 | | 2. | South Korea | 7:08.49 | Q | | 2 | 4. | | | Hwang Sun-woo 1:46.42, Kim Woo-min 1:46.65, Lee Yoo-yeon 1:48.04, Lee Ho-joon 1:47.38 | | 3. | China | 7:09.53 | Q | | 6 | 5. | | | Hong Jinquan 1:47.54, Zhang Ziyang 1:47.34, Chen Juner 1:48.45, Pan Zhanle 1:46.20 | | 4. | Australia | 7:09.98 | Q | | 4 | 8. | | | Brendon Smith 1:49.14, Zac Incerti 1:46.44, Samuel Short 1:46.97, Mack Horton 1:47.43 | | 6. |  Italy | 7:10.16 | | | 5 | 9. | | | Stefano Ballo 1:47.63, Matteo Ciampi 1:47.27, Gabriele Detti 1:47.89, Stefano Di Cola 1:47.37 | | 6. |  Vietnam | 7:29.74 | | | 1 | 13. | | | Trần Hưng Nguyên 1:51.27, Nguyễn Hữu Kim Sơn 1:52.86, Hoàng Quý Phước 1:50.79, Nguyễn Huy Hoàng 1:54.82 | | 7. |  Thailand | 7:40.27 | | | 7 | 14. | | | Tonnam Kanteemool 1:52.01, Dulyawat Kaewsriyong 1:54.33, Ratthawit Thammananthachote 1:57.29, Navaphat Wongcharoen 1:56.64 |
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