Craig Johnston's second-half finish earned Cowdenbeath a replay as they held Arbroath to a 1-1 draw in their William Hill Scottish Cup third round clash.The visitors had a number of chances to open the scoring in the first half but were unable to find a way past Cowden goalkeeper Jamie Sneddon before the break.Arbroath finally made the breakthrough in the 56th minute when Mark Whatley found the bottom corner of Sneddon's net.But Cowdenbeath were back on terms after 73 minutes when Johnston headed in from the middle of the box.And the hosts could have taken the lead three minutes later when Kyle Miller hit the woodwork from the centre of the area.