The 2010 World Champion entered the last four beating Navruzov 3-1.
Sushil could have wrapped up the fight in period 2 but Navruzov turned the tables on him with six seconds remaining.
Sushil got the measure of his opponent in period 3, winning it 2-0 to seal the contest.
The 29-year-old started the day in a scintillating fashion, dismissing the Beijing gold medallist, Ramazan Sahin.
In Image: Sushil Kumar of India competes with Tatsuhiro Yonemitsu of Japan (in blue) during their 66-kg freestyle wrestling gold medal match