In New Zealand, many boating mishaps don’t actually happen on the water—they happen on the way to the boat ramp. A trailer is a hard-working piece of machinery that spends its life being dunked in corrosive saltwater and carrying heavy loads at high speeds.
Before you hitch up for your next trip, run through this 5-step safety check to ensure your boat makes it to the ramp (and back home) safely.
1. The “Big Three” Connections
- The Hitch & Tow Ball: Ensure the coupling is fully seated on the tow ball and the locking lever is snapped shut. Always use a locking pin or clip to prevent the lever from vibrating open.
- Safety Chains: Cross your chains under the drawbar in an “X” pattern. This creates a cradle that will catch the trailer tongue if the hitch fails. Ensure you are using rated D-shackles (look for a load rating stamped on them).
- The Light Plug: Plug in and do a “walk-around.” Check your indicators, brake lights, and tail lights. If they aren’t working, salt corrosion in the plug is usually the culprit—a quick spray of electrical cleaner often does the trick.
2. Wheel Bearings (The Most Common Failure)
Bearing failure is the #1 cause of trailers stranded on the side of the motorway.
- The Heat Test: After a short drive, safely touch the wheel hubs. They should be cool or slightly warm. If one is hot to the touch, the bearing is failing or lacks grease.
- The Wobble Test: With the trailer jacked up, grab the wheel at the top and bottom and try to rock it. If there is significant movement or a “clicking” sound, your bearings need tightening or replacement.
- Grease: If you have Bearing Buddies, ensure they are filled—but don’t overfill, as this can blow out the rear seals.
3. Tyres & Pressure
- Pressure: Trailer tyres often need higher PSI than car tyres (check the sidewall for the “Max Cold” rating). Under-inflated tyres generate heat and are prone to blowouts.
- Cracking (Dry Rot): Because trailers often sit parked for long periods, the sidewalls can crack even if the tread looks new. If you see “spider-web” cracks, replace the tyre immediately.
- The Spare: Check that your spare tyre is inflated and that you actually have a jack and lug wrench that fits the trailer nuts (they are often a different size than your car’s!).
4. Braking System
If your trailer (plus boat) has a Gross Laden Weight (GLW) of over 2000kg, it must have brakes.
- Surge Brakes: Check that the master cylinder has fluid and that the sliding hitch moves freely.
- Brake Pads: Peek behind the wheel to ensure there is still plenty of “meat” on the brake pads. Saltwater eats brake components quickly, so rinse these thoroughly after every launch.
5. Winch & Tie-Downs
- Winch Strap: Inspect the full length of the strap for frays or UV damage. A snapping strap under tension is extremely dangerous.
- Transom Straps: Your winch should not be the only thing holding the boat to the trailer. Always use heavy-duty tie-down straps at the stern (back) to prevent the boat from bouncing or shifting on the rollers.
Pro Tip: The “Touch Test”
Every time you stop for fuel or coffee on a long trip, walk around the trailer and feel the wheel hubs and the tyres. Catching a “hot” hub early can save you an expensive tow and a ruined weekennd.
