A Sydney magistrate has been found guilty of indecently assaulting a teenage boy in the 1980's despite claiming the allegations were false.

Key points: Graeme Curran was found guilty on seven of nine charges

Graeme Curran was found guilty on seven of nine charges The victim was the son of a family friend and said he often "froze" during assaults

The victim was the son of a family friend and said he often "froze" during assaults Curran will remain suspended from his position until he has exhausted his appeal rights, the Chief Magistrate's Office said

Graeme Curran, 68, stood trial for nine charges of indecently assaulting the teenager in his Sydney home and on sailing and camping trips between 1981 and 1983 when the boy was aged between 13 and 15.

A jury found Curran guilty of seven charges and not guilty of the remaining two.

Curran pleaded not guilty to all abuse against the victim, who was the child of a family friend.

He showed no emotion when the verdicts were delivered.

The court had been told Curran was 22 when he first met the boy, who was seven years old at the time.

The boy later regarded Curran as part of the family and was babysat by him on occasions, Crown Prosecutor Mark Hobart SC said.

The victim's friend, Kerry Brewster, read an impact statement outside court. ( ABC News: Jamelle Wells )

During the trial, the court heard the magistrate used to call the teenager "his little chicken" before assaulting him.

Outside court, the victims' friend, Kerry Brewster, said her friend hopes the jury's decision encourages other victims of child sexual abuse to come forward, and read a statement from the victim.

"The liberation gained by the conviction is profound, but even more so was the opportunity to stand before the court and tell my story. This is where true freedom is found," the statement said.

The victim gave evidence during the trial that the assaults upset him and at times he froze while being assaulted.

According to the Crown, Curran "groomed" the victim by encouraging him to sleep naked when staying at his house.

The jury was also told about a "ritual" in which Curran would pull back the sheets of the bed in the morning and stroke the boy's naked body.

During the Easter holidays of 1981 or 1982, the court heard Magistrate Curran pulled the boy's pants down and put his penis in his mouth on an overnight sailing trip.

Curran was suspended from his position as a magistrate after he was charged and he will remain suspended until all criminal proceedings have concluded, according to the Chief Magistrate's Office.

"As he has not exhausted his appeal rights it would be inappropriate to make any further comment," a statement from the office said.

Curran's small group of supporters, who sat in the public gallery for his trial, made no comment outside court.

Curran's bail has been continued until he is sentenced on May 17.

The court heard he had a number of health issues and wanted to "get his affairs in order" before he was sentenced.

Acting District Court judge Anthony Rafter said it was likely Curran would receive a custodial sentence.