The Orica-GreenEDGE sprinter, whose mother is Korean, delivered a "homecoming" victory of sorts in beating Avanti Racing Team's Patrick Bevin and race leader Wouter Wippert (Drapac).
"It was good to have a bit of a drag race with Wouter and really see where I’m at against him and obviously he’s been going really well so it was good to get over him" Ewan said.
"When I woke up I was pretty stiff and sore (after a Stage 1 crash). Once my body warmed up and we got racing then everything seems to sort of numb and I was feeling alright halfway through the race.
"It was pretty hard in the end there, but the team did great to keep everything under control. All the little breaks (were) always kept within a few seconds so it was never really a big threat. I was feeling pretty good on the climbs as well.
"We’re hoping for more stage wins, but it will be interesting to see how the oveerall pans out. With six riders in each team it’s always hard to control the race. I think as long as Drapac and our team can co-operate, we should be able to keep everything in control."
The day started fast with the peloton averaging 60kph for long stretches, as a result first 40km saw a number of attempted fail to stick.
At the intermediate sprint after 48.8km, Avanti Racing Team's Anthony Giacoppo and Neil Van de Ploeg took the first two spots, followed by Nicolas Marini (Nippo-Vini Fantini) and Jaeyeon Im of Korea's National Team.
Kazuo Inoue (Bridgestone Anchor), Kihong Yoo (Geumsan Insam Cello), Kyunggu Jang (Korail), Keisukke Kimura (Shimano Racing Team) finally shook themselves free of the peloton to steadily buld a lead over the main bunch.
The break held onto a three-minute advantage over the peloton and, 60km from the finish, Jang started pulling away, gaining a lead of up to a minute.
With 20km remaining, the peloton, again spearheaded by Drapac, caught up with the break, leaving Jang as the lone escapee.
Jang's hopes of stage victory, if he ever harboured them in the first place, were dashed inside the last 5km and the race ended with a well-oiled ORICA-GreenEDGE sprint train setting Ewan up to win convincingly.