Opposition Leader Tony Abbott has pledged that he will never head up a minority government, should Australian voters deliver a hung parliament again, in a bid to get voters to make a definite choice for the Liberal and National parties.

In his first address after the federal election was called for September 7, Mr Abbott said that if the vote resulted in a hung parliament, he would not put his hand up to be prime minister - in direct contrast to his Labor opponents.

''There's a commitment that I want to give you … There will not be deals done with independents and minor parties under any political movement that I lead,'' he said from the Opposition party room at Parliament House.

''If there is a hung parliament, there won't be a Coalition government led by Tony Abbott.''