He was the caller who described the Prime Minister as the "world's worst salesman", and now Andrew McNabb has come back for a second bite, declaring it is time for Tony Abbott to step aside.

Mr McNabb, a Liberal Party member who first confronted Mr Abbott in a talkback interview on Thursday, hit the airwaves again on Friday, telling Fairfax radio station 3AW it was time for a change in leader.

He said the government should make a leadership change as soon as Parliament returns, and it should be Julie Bishop who replaces Mr Abbott, with Malcolm Turnbull as Treasurer.