Tenant refused to leave after court eviction, Sheriff is busy

[Sam George]

I live in New York, Long Island, Suffolk county. I have eviction by a court order, judgement of possession, but the sheriff is busy for 6 weeks. Can I cut utilities of the property where tenant stays since I have a possession back of the house? I know I cannot get him out, sheriff has to do it, but he has no legal rights, and I don’t want to pay his utilities. Does that considered an illegal action and he can call the police on me? Or the court order considered a powerful legal document?