The Bundaberg couple were rescued after the husband was injured and now may have lost the uninsured $150,000 vessel.
The 12m boat Illusion was reluctantly abandoned by Ann and Chris Robinson 390 nautical miles east of Bundaberg on Wednesday, when they were taken on board a rescue ship.
The chance of recovering the yacht, which was left drifting in the Coral Sea away from Australia, is remote.
The Bargara couple, in their 50s, were sailing to New Caledonia when they hit wild weather and were battered by 50 to 70-knot winds last week.
Mr Robinson's seriously injured his leg when it got tangled in a line when he threw out a sea anchor to stabilise the boat, and his wife had to cut him free and pull him to safety.