Mr Pendred said the racing was "fast and furious."
"Because of the rain during the morning the race track was a bit slippery and the racing extra challenging, but it was still great fun, and that's what it's all about," he said.
The annual Omokoroa No 1 School Ride-On Mower Day is well-known throughout New Zealand, and even draws enthusiasts from the South Island.
Funds raised will go towards the new five-lane 25m school pool.
Bronwyn Carter said the exact amount raised had yet to be determined.
"It was an awesome effort by everyone involved in making the day a huge success, including the Year 6 kids who pulled together to run their own fundraising stalls. They did an amazing job," she said.