Police in Portree on Skye are investigating the theft of two outboard motors worth a total of about £750.
A police spokesman said the thefts took place at Pontoons Pier between 1pm last Thursday and 9am the following day.
The outboards are described as a Mariner 3.3 and a Honda 2.3.
Police Sergeant Andrew Shaw said: “I would like to remind members of the public to remain vigilant and to report anything untoward or suspicious that they hear or see.
“If anyone has any information about this incident I would ask them to get in touch.”
Anyone with information is asked to contact the police on 101 or Crimestoppers on 0800 555111.