Mane, the best Asian finisher at the World Amateur in Japan and fourth at the Asian Games last month, is now five-under 137 and four shots behind the new leader, Australia's Antonio Murdaca (69-68). Mane was tied 12th after the first round.
Three other Indians made the midway cut. Rigel Fernandes (74-71), the Bangalore-born, who studies and plays amateur golf in US, started on the tenth to have three birdies against two bogeys to move to tied 16th place up from overnight 30th place while Viraj Madappa (75-73) in tied 29th place at four-over 148 and Aman Raj (78-75) in tied 54th place also made the cut, which fell at 10-over 154.
The winner of the Asia-Pacific Amateurs gets a start at the Masters besides a spot in the Qualifying for the British Open.
Mane, who has been India's top amateur, could well become only the third Indian after Jeev Milkha Singh (2007-2008-2009) and Arjun Atwal (2011) to play at the Masters, if he wins the Asian Amateur and he is still in the mix just four behind with 36 holes to go.
Mane teed off from the tenth and birdied it immediately, despite the blustery conditions. He gave away the shot on 15th but again went under par on par-5 17th. On the second nine, he was in fine form with birdies on second, third, sixth and eighth, but dropped shots on fourth and ninth for a 69 that put him in a tie with Guan Tianlang, who as a 14-year-old made the cut at the Masters in 2013.