The early loss of both openers did little to deter the aggressive tendencies of Brett Hampton, who rattled the pickets with relative ease on his way to a rapid 43.
His dismissal, caught flicking on the up through midwicket off the bowling of Mike Jones, swung the contest the Mount's way by stalling Greerton's burgeoning run rate.
Some fine bowling from Jones and Dale Swan, backed up by handy spells from Alex Gooding, Pete Drysdale and Daniel Hill, kept Greerton to a below-par score of 161.
Mount openers Drysdale and Tim Clarke went about their work in contrasting fashion, putting on a valuable 64-run stand that kept their side in front.
Batsmen came and went after Clarke's demise for a breezy 33, but Drysdale batted through the innings with a typically stoic knock of 65 not out to secure the title for his side.
Mount premier captain Mark Divehall, who believed the two best teams had met in the final, was thrilled to lock another piece of silverware away for the winter.
"It's my first year as captain and I'm absolutely stoked," said Divehall.
"It's even better that our reserve grade side has backed it up as well.
"The games we've lost this year have mostly been when we had our Bay players out, and that shows the depth of Mount Maunganui cricket."
Divehall described the influence of a quartet of Bay of Plenty players as invaluable.
"The great thing about the Bay players we have is that they are passionate about the Mount. Pete Drysdale, Tim Clarke, Tony Goodin and Dale Swan - those guys are Mounties to the core.
"Pete is probably the most mentally solid cricketer in the Bay. Tim is flamboyant, but has that desire and urge to win."
Divehall said the 17-over period between drinks breaks, in which Mount bowlers Jones and Swan put the brakes on the Greerton batting effort, was pivotal.
He could not speak more highly of Hampton, who hit the ball cleaner and harder than anyone else on show.
"He's a fantastic cricketer. He's probably the one guy in the Bay who can win a game in the field, with the bat or with the ball.
"You look at him and say he should score a hundred every week - he's that good."
Classy Greerton captain Shane Wineti, who held his side's batting effort together with a tenacious knock of 32, was gracious in defeat.
He congratulated the Mount on their win while reflecting on a season in which his side played a great deal of damaging cricket for relatively little reward.
Mount Maunganui 164/5 (P. Drysdale 65no, T. Clarke 33, B Guild 27; M. Jarvis 2/21) beat Greerton 161 (B. Hampton 43, S. Wineti 32; P. Drysdale 3/24, M. Jones 2/31, D. Swan 1/16).