Boat Trailers

Bunks, rollers and the jet ski carreta:

what really separates one trailer from another is what the hull rests on. A bunk trailer carries the boat on carpeted wooden boards that follow the bottom, which spreads the load, suits most fibreglass lanchas and centre consoles, and lets the boat float on and off once the trailer is backed in deep enough. A roller trailer sits the hull on rows of rubber or poly rollers, so the boat can be winched up from a shallow ramp or off the sand, at the cost of far more parts that wear and seize. Carretas for jet skis are the small end, single or double and light enough to push by hand. Bigger power boats move onto tandem-axle frames, which track better on the highway, while a deflated inflatable rarely needs a trailer at all.

A trailer that fits the hull and the launch:

start with the plate on the frame, which gives the load the trailer is built to carry. That rating has to cover the boat with its engine, a full tank and the gear that stays aboard, not the dry weight from the brochure. The bunks or rollers should sit under the hull’s strong points, with the transom supported rather than hanging off the back. A panga’s flat bottom and a deep-V centre console want very different setups, and a trailer adjusted for one will not carry the other without work. Where you launch decides the rest. On the Pacific side a low tide can leave the end of a ramp dry for hours, and many small boats go in off the beach, which is where rollers earn their place. Each of those launches dunks the bearings, springs and lights in salt water. Galvanized steel and aluminium stand that far better than painted steel, which rusts from inside the box sections. Sealed LED lights survive being submerged; old bulb lamps fill with water and die. Imported galvanized trailers from makers such as Continental turn up alongside frames welded locally to suit one particular boat.

Hubs, springs and painted-over rust on a used carreta:

the wheel bearings, the roles, are what leave people stranded on the shoulder. Jack each wheel off the ground, spin it and listen for grinding, then rock it top to bottom: any play means bearings to replace. Look along the leaf springs and the U-bolts that hold the axle, where salt bites first, and check the welds for cracks or rust lifting the zinc. Be wary of a galvanized frame that has just been painted, which can be honest upkeep or rust that has already broken through. Check the tyre sidewalls for sun cracks and read the date code, since a trailer that sits most of the year ages its tyres long before it wears the tread. Press a thumb into the bunk boards for soft wood under the carpet, and before you agree a price, plug it into your vehicle and check every light.

Listing a carreta that outlived its boat:

say what it last carried, the make, the hull length and whether it was a V hull, a panga or a jet ski, because that tells a buyer more about fit than any single measurement. Give the rated capacity from the plate, the number of axles, whether it has bunks or rollers and whether they adjust, and when the bearings were last repacked. Be straight about whether it went into the sea at every launch. Photograph the plate, the hubs, the springs and the underside, and say whether the papers that go with it are in order. Most carretas are passed on by someone who sold the boat, moved it to a mooring or traded up to something too big to tow, and the buyer who drives down from Cartago or Alajuela usually turns up with a tape measure and the dimensions of their own hull, ready to check them against your bunk spacing.