An associate of an outlaw motorcycle club has been fined and ordered to surrender his belt buckle over a weekend incident in the north-west Queensland city of Mt Isa.

Michael George Potter, 51, was arrested on Saturday afternoon after he began yelling at police from a pub on Camooweal Street.

Officers entered the pub and arrested Potter for being drunk and disorderly and wearing a prohibited item - a belt buckle depicting the Rebels outlaw motorcycle club.

Potter, who is a known associate of the Rebels, faced Mount Isa Magistrates Court today.

After originally pleading not guilty to the charges, Potter changed the plea to guilty.

He was fined $2,500 and ordered to surrender the belt buckle to be destroyed.