Police say a vandal who threw a stone through a digger window has caused "significant inconvenience and expense" to the owner.
It happened between March 29th and April 3rd at Ballaugh Plantation – the excavator is being used to prepare the ground for new planting of trees.
Officers say due to the actions of the person responsible work has now stopped.
Anyone who has information is asked to contact Ramsey Police Station or Crimestoppers.