The red boat, laden with other items including a spare outboard motor, was stolen from a storage field on the Towcester Road in Blisworth between April 21 and 25.
The boat is called the Soarer and is relatively dirty due to being in storage.
Three men are believed to have stolen the boat. All are white with one large with long dark hair, one slim with long dark hair and the smaller one with ginger hair.
Two vehicles were used in the theft, a white transit van with yellow lights on top, and a grey/green Land Rover which was used to tow the speed boat.
Anybody with information can call Northamptonshire Police on 08453 700700.
Click here to see a map of burglaries and motor break-in in Northampton so far in 2008
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