Fishers across Tasmania are warning it is only a matter of time before someone is killed or seriously hurt after repeatedly finding their boats, trailers and vehicles tampered with.

In the last fortnight, several fishers across the state have had their vehicles and boat trailers sabotaged in some way, an issue they say has arisen before and is becoming more common.

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North-west fisher Todd Bakes was driving back from a fishing trip last weekend in Burnie when his vehicle and trailer started bumping violently.

"I pulled over, and saw that two wheels on the left side — one on the trailer and one on the car — had almost come off," he said.

"Someone had loosened the bolts from the wheel hub.

"Luckily I stopped before the wheels came completely off, but it could have been a lot worse."

Mr Bakes raised his concerns on social media, which went viral with tens of thousands of views and hundreds of shares, with people from across Australia sharing similar experiences.

Mr Bakes is one of several fishers who have told the ABC their vehicles and trailers had been sabotaged in recent weeks.

Greg 'Tubby' Quinn, president of the Game Fishing Club in St Helens, found his brake callipers had been disabled two weeks ago when he was on his way to Eaglehawk Neck.

"It's only a matter of time before someone is badly hurt or killed," he said.

"It could have meant my vehicle, my 10-metre boat, would have gone through someone's house.

"I've filed a police report [and] it is an issue that we hear about every couple of weeks, it's a big problem.

"With that situation, the brakes failed, and as soon as I put my foot on the brake I realised I had no trailer brakes with the extra weight on the back."

Mr Quinn said the issue had become so commonplace that many fishers are now planning on putting cameras on their vehicles and trailers.

A wheel that was loosened from Todd Bakes' trailer. ( ABC News: Todd Bakes )

"It's gotten so bad now that if we have a competition we actually put up cameras just to try and keep an eye on them. We need to identify who is doing this," he said.

Marine and Safety Tasmania (MAST) alerted fishers to one such incident in Rosny on August 27 this year.

"Looks like the trailer tampering is happening again. This occurred at the Rosny ramp on Friday," the alert said.

"As you can see from the photo, it could have been nasty as the boat was in excess of six metres.

"The boat owner returned to the ramp to find the trailer hitch pin had been removed, the handle pulled up, and the pin then replaced with the coupling placed insecurely on the tow ball.

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"No matter which boat ramp you use, always check your trailer coupling before putting the boat back on the trailer," the alert stated.

MAST said if any fisher noticed anything suspicion they could get in touch or call Crime Stoppers to file a report

Peter Hopkins from MAST said councils should now consider putting in CCTV cameras at some popular boat ramps.

"With 250-odd boat ramps and 300 ramps around the state, a CCTV camera on each ramp isn't practical, but certainly something perhaps councils who own the majority of these fronts could look at to help protect the boating public and their ramp," Mr Hopkins said.

Mr Hopkins said MAST had recorded 12 incidents of trailer tampering in three years, but believed the real number was probably higher.

Todd Bakes said he was lucky he stopped when the wheels began to wobble. ( ABC News: Henry Zwartz )

For Mr Quinn, the issue is one of life and death.

"What I would tell the people out there who are doing this is that if we come off on the highway, it could be your family on the lane opposite," he said.

"They could be hurt or killed."