The Lehmann Timber was held captive for more than a month off the coast off Somalia.
The pirates were reportedly paid a ransom of $US 750,000 to release it.
After being freed on Tuesday, it headed for a safe port but has run aground.
The 15 crew members have reportedly been unable to start the engine for over a day and have sent out a distress signal.
A U.S. ship is said to be on the way to help.
Sunday, July 13, 2008
Captured by pirates, ransomed and now... aground: