How To Replace Trailer Bunks With Boat On Trailer

How to Replace Trailer Bunks with a Boat on a Trailer

Replacing trailer bunks while your boat is already on the trailer might seem daunting, but with the right approach and tools, it's a manageable DIY project. This guide provides a step-by-step process to safely and efficiently replace your worn-out bunks.

Assessing the Situation & Gathering Supplies

Before you begin, thoroughly inspect your existing bunks. Note their size, material (carpet, wood, etc.), and the overall condition of the trailer's bunks. This will help determine the type and quantity of replacement bunks you need. It's crucial to measure the length and width of your current bunks accurately to ensure a proper fit for the replacements.

You'll need the following:

• Replacement Bunks: Ensure these match the size and material of your originals or are compatible with your trailer's design.
• Measuring Tape: For accurate measurements of the existing bunks and trailer structure.
• Screwdriver (or Drill): Depending on the type of fasteners used to secure the bunks.
• Wrench (or Socket Set): To possibly remove existing hardware if necessary.
• Safety Glasses: Protect your eyes from debris.
• Work Gloves: Protect your hands.
• Wood Block (optional): For added support during bunk removal.
• Level: To ensure even placement of the new bunks.
• Pencil or Marker: To mark positions for drilling.
• Caulk (optional): To provide a watertight seal between the bunks and the trailer frame.

Step-by-Step Replacement Process

1. Secure the Trailer: Ensure your trailer is stably positioned on level ground and the boat is secured to prevent movement. Engage the trailer's safety chains and wheel chocks for extra precaution.

2. Remove Old Bunks: Carefully remove the screws or bolts securing the old bunks to the trailer. Use a wood block to support the boat's weight if necessary, easing the pressure on a single bunk during removal. Take photos of the process and bunk placement for reference when installing the new ones.

3. Clean the Surface: Thoroughly clean the trailer's frame where the new bunks will be mounted. Remove any old caulk, rust, or debris to ensure a clean, secure attachment.

4. Prepare New Bunks: If required, prep your new bunks—this may involve trimming or adjusting them to precisely fit your trailer's frame. Always double-check your measurements before making any modifications!

5. Install New Bunks: Place the new bunks in their designated locations, mirroring the position of the old bunks. Use your pencil to mark the hole locations if necessary. Secure the bunks using the appropriate screws or bolts. Tighten the fasteners securely, ensuring even pressure and preventing any looseness.

6. Check Alignment & Level: Verify that the new bunks are aligned correctly and level. Use a level to ensure that the boat will sit evenly on the replaced bunks.

7. Apply Caulk (Optional): Apply a bead of marine-grade caulk along the edges of the new bunks where they meet the trailer frame. This adds extra protection against water damage.

8. Re-secure the Boat: Once satisfied with the installation, re-secure your boat to the trailer, paying attention to the overall stability and balance.

9. Test the Launch: Before heading out, perform a test launch to verify that the boat sits securely and evenly on the new bunks.

Maintenance Tips for Long-Lasting Bunks

• Regular Inspection: Periodically inspect your trailer bunks for wear and tear.
• Proper Cleaning: Clean your bunks after each use to remove any dirt, debris, or saltwater.
• Lubrication: Apply a marine lubricant to your bunks and trailer components to prevent corrosion.

By carefully following these steps and prioritizing safety, you can successfully replace your trailer bunks with your boat still on the trailer. Remember, if you are uncomfortable performing this task yourself, consult a professional for assistance.