Openers Shaun Marsh and Aaron Finch showed Scotland no mercy, blasting career-best one-day international scores to power Australia to a huge first-innings total in Edinburgh on Tuesday.

Marsh scored 151 and Finch 148 as Australia posted 3-362 from their 50 overs – the highest score by any team against Scotland – after losing the toss at the Grange Cricket Club.

The pair combined for 246 runs, the highest ever ODI opening-wicket partnership by an Australian duo.

Following on from his record-breaking Twenty20 knock against England last week, Finch carried his devastating form into the 50-over format with another breakthrough innings.

It was his first one-day century and he had never scored more than 38 in seven ODI appearances.

He fell just short of becoming the eighth Australian man to score 150 in a one-day international, a feat Marsh later managed.

Marsh scored his third ODI ton and beat his previous best score of 112 with his knock from 149 balls.

Unlike Finch’s remarkable T20 innings of 156 from 63 balls in Southampton last week – where he blasted a record 14 sixes – the stocky opener was off to a slow start in cloudy and cool conditions in the Scottish capital.

Some tidy bowling from Scottish opening pair Iain Wardlaw and Gordon Drummond kept Finch and Marsh to just 11 runs from the opening five overs.

The first boundary did not come until Finch hit a four in the seventh over but he began scoring more freely after that and reached his maiden ODI half-century off 53 balls.

He got a lifeline when on 24 in the 11th over when Scottish wicketkeeper David Murphy missed a legitimate stumping chance.

Finch’s first six came in the 22nd over and he patiently brought up his ton from 96 balls before returning to his “Finch hitting” ways as Australia took the batting powerplay.

He raced to within reach of 150 before mistiming another attempted six off the bowling of spinner Majid Haq and was caught by Freddie Coleman.

Finch’s innings featured 16 fours and seven sixes and Marsh kept scoring ticking along strongly after his departure.

After reaching his century from 128 balls, he needed only another 21 balls to race to 151 before being caught by Gordon Goudie off Wardlaw’s bowling.

Wardlaw (2-69) took dismissals in successive balls when Shane Watson (37 off 24) was out in exactly the same fashion the following ball.

George Bailey (10) and captain Michael Clarke (4) were the not-out batsman.