Mr Fletcher did not want to say the value of the logsplitter, but he said it was worth a lot of money as it was one of a kind.
"It's a big, blue tractor motor on wheels, with a drawbar on the front. On the back is a hydraulic ram with a table around it. It's very distinctive."
The machine is used to cut down wood after it has been roughly cut with a chainsaw.
Jared Fletcher said the theft was a "boot in the gut".
"But we're not going to let this stop us," he said.
•If you have any information about the logsplitter, please contact Wanganui Police on [06] 349 0600, or Jared Fletcher on 027 3370725.