The dismissal of Tansley was a momentum shifter and Kamo High got stuck into the Onerahi middle and lower order.
Off-spinner Harry Cooper (2 for 21) bowled an economical spell before Parkes and Turner returned to snare the last two wickets.
Kamo High's skill with the ball left them a manageable target of 143 for the title.
Things didn't start well for Kamo High as opening bowlers Axel Sheppard (2 for 17) and Adam Sylva (1 for 15) made early inroads to have them 12 for 2.
The second wicket brought Turner to the crease and he and Parkes (12) looked to get the chase back on track.
The loss of Parkes when the score was on 48 was a big blow, trapped in front by Kirk Henderson (1 for 25).
The game was evenly poised at 63 for 3 before the introduction of part time off-spinner Woodman turned the game on its head.
Woodman dismissed the danger man in Turner after a defiant knock before ripping through the Kamo High batting order to leave them reeling at 98 for 8.
Reuben Crum (6), Craig Cooper (7) and Bolton (6 not out) tried to steer their team home but a late run out sealed their fate.
Both sides now look to be in contention in the remaining reserve grade competitions.