Index: wp-admin/includes/file.php
===================================================================
--- wp-admin/includes/file.php	(revision 11998)
+++ wp-admin/includes/file.php	(working copy)
@@ -609,7 +609,7 @@
 	if ( ! defined('FS_CONNECT_TIMEOUT') )
 		define('FS_CONNECT_TIMEOUT', 30);
 	if ( ! defined('FS_TIMEOUT') )
-		define('FS_TIMEOUT', 30);
+		define('FS_TIMEOUT', 300);
 
 	if ( is_wp_error($wp_filesystem->errors) && $wp_filesystem->errors->get_error_code() )
 		return false;
Index: wp-admin/includes/class-wp-filesystem-ftpsockets.php
===================================================================
--- wp-admin/includes/class-wp-filesystem-ftpsockets.php	(revision 11998)
+++ wp-admin/includes/class-wp-filesystem-ftpsockets.php	(working copy)
@@ -28,6 +28,10 @@
 				return false;
 		$this->ftp = new ftp();
 
+		//FTP uses the timeout on a per-connection basis, Others use it on a per-action basis.
+		if ( ! defined('FS_TIMEOUT') )
+			define('FS_TIMEOUT', 300);
+
 		//Set defaults:
 		if ( empty($opt['port']) )
 			$this->options['port'] = 21;
Index: wp-admin/includes/class-wp-filesystem-ftpext.php
===================================================================
--- wp-admin/includes/class-wp-filesystem-ftpext.php	(revision 11998)
+++ wp-admin/includes/class-wp-filesystem-ftpext.php	(working copy)
@@ -29,12 +29,11 @@
 			return false;
 		}
 
-		// Set defaults:
-		//This Class uses the timeout on a per-connection basis, Others use it on a per-action basis.
-
+		//FTP uses the timeout on a per-connection basis, Others use it on a per-action basis.
 		if ( ! defined('FS_TIMEOUT') )
-			define('FS_TIMEOUT', 240);
+			define('FS_TIMEOUT', 300);
 
+		// Set defaults:
 		if ( empty($opt['port']) )
 			$this->options['port'] = 21;
 		else
@@ -82,8 +81,8 @@
 
 		//Set the Connection to use Passive FTP
 		@ftp_pasv( $this->link, true );
-		if ( @ftp_get_option($this->link, FTP_TIMEOUT_SEC) < FTP_TIMEOUT )
-			@ftp_set_option($this->link, FTP_TIMEOUT_SEC, FTP_TIMEOUT);
+		if ( @ftp_get_option($this->link, FTP_TIMEOUT_SEC) < FS_TIMEOUT )
+			@ftp_set_option($this->link, FTP_TIMEOUT_SEC, FS_TIMEOUT);
 
 		return true;
 	}