"I rode conservatively after that to save energy. I knew I could afford to do that because I'd built up a gap on most of the field,"said the 33-year-old Burgess.
"I had figured on doing eight laps, but it was nine for me in the end. I just settled into a routine and cruised at the finish."
Burgess eventually settled for fourth overall, easily good enough for him to win the Ironman class title, ahead of Taupo's Brad Groombridge, who came home seventh overall.
Race co-winner Columb, a motocross professional, praised Burgess afterwards.
"I want to give credit to Reece Burgess. He was racing it as an Ironman and he led for quite a while. He's definitely going to have 'monkey butt' this week."
Only five teams or individuals completed nine laps in the six hours, with some combinations managing just three or four of the 32km laps.