Thieves stole 24 boats in Northern Ireland last year, police have revealed.
Another 58 engines were taken because they are relatively easy to detach from vessels.
Police officers will be visiting boat clubs in the next few months to discuss crime prevention measures and supply them with engine covers to make them less desirable to thieves.
PSNI crime prevention inspector David Connery said: "Due to the nature of these crimes, it can take quite a while for the theft to be reported to us and detecting the equipment may prove difficult.
"Thieves are attracted to outboard engines as they are relatively easy to detach from the boat.
"We're encouraging owners to remove the original cowling and replace with a cover; the resale value for the engine plummets when this isn't present."