Mastering the Art of Boat Maintenance: How to Jack Up Boat to Change Bunks

Whether you’re a seasoned boater or just starting out, the time will come when you need to replace your boat’s bunks. These wooden supports are crucial for keeping your boat stable and secure on the trailer, and over time, they can become worn, rotted, or damaged. The question is, how do you get the boat off the trailer to do the job? This is where learning how to jack up your boat to change bunks comes in.

This comprehensive guide will walk you through the entire process, from gathering the necessary tools and materials to safely lifting your boat and installing new bunks.

Safety First: Prioritizing Your Well-being

Before you even think about lifting your boat, safety should be your top priority. Here’s a rundown of essential precautions:

• Read Your Boat and Trailer Manuals: Thoroughly review the owner’s manuals for both your boat and trailer. They will provide specific instructions and weight limits for your particular model.
• Inspect Your Trailer: Check the condition of your trailer’s components, including the frame, axles, tires, and jack. Make sure everything is in good working order and can handle the weight of your boat.
• Use Proper Lifting Equipment: Invest in high-quality jack stands that are rated for the weight of your boat. Don’t skimp on safety here!
• Clear the Area: Ensure the area where you’ll be working is clear of obstructions, including loose debris, tools, and other potential hazards.
• Get Help: Whenever possible, have a helper on hand. Two sets of hands make the job easier and safer.
• Wear Protective Gear: Always wear safety glasses, gloves, and sturdy closed-toe shoes when working on your boat.

The Tools and Materials You’ll Need

Before you begin, gather the following tools and materials:

• Jack Stands: As mentioned, these are essential for safely supporting your boat while it’s off the trailer.
• Jack: A hydraulic jack is ideal for lifting your boat, but a bottle jack can work as well.
• Wrenches: You’ll need wrenches to loosen and tighten nuts and bolts on the trailer and boat.
• Screwdriver: A screwdriver will be needed for removing and installing the old and new bunks.
• Level: A level is crucial for ensuring your boat is sitting evenly on the jack stands.
• New Bunks: Choose bunks made from durable materials like marine-grade plywood or composite wood.
• Wood Glue: Use a high-quality wood glue to secure the new bunks to the trailer.
• Wood Screws: Use stainless steel screws that are long enough to penetrate the trailer frame and the new bunks.
• Measuring Tape: You’ll need a measuring tape to determine the correct spacing and length for the new bunks.

Preparing Your Boat and Trailer

1. Park Your Boat on a Level Surface: Make sure the trailer is parked on a level surface to ensure the boat is balanced and stable during the lifting process.
2. Secure the Boat: Use bow and stern straps to secure your boat to the trailer. These straps will help prevent the boat from shifting or moving as you lift it.
3. Remove the Trailer Lights: Disconnect the trailer lights to avoid damaging them during the lifting process.
4. Remove the Boat’s Support Straps: If your boat has support straps that run along the sides, remove them to allow the boat to be lifted freely.
5. Locate the Jack Points: Consult your trailer manual or inspect the trailer frame to identify the designated jack points. These are typically located on the trailer frame near the axles.

Lifting Your Boat Safely

1. Position the Jack: Place the jack under one of the designated jack points on the trailer frame.
2. Start Lifting: Slowly lift the boat using the jack. Be sure to lift the boat evenly and gradually, avoiding any sudden jerking movements.
3. Place the Jack Stands: Once the boat is lifted a few inches off the trailer, position a jack stand under each jack point. Ensure the jack stands are securely in place and can support the weight of the boat.
4. Lower the Boat onto the Jack Stands: Slowly lower the boat onto the jack stands, making sure it rests evenly on all four stands.
5. Remove the Jack: Once the boat is securely supported by the jack stands, remove the jack.

Replacing the Bunks

1. Remove the Old Bunks: Use a screwdriver or wrench to remove the screws or bolts holding the old bunks in place. Carefully remove the old bunks, taking note of their placement and spacing.
2. Inspect the Trailer Frame: Check the trailer frame for any damage or corrosion. If necessary, repair or replace any damaged sections before installing the new bunks.
3. Install the New Bunks: Position the new bunks in the same location as the old ones, ensuring they are properly aligned and spaced. Use wood glue and screws to secure the new bunks to the trailer frame.
4. Check for Levelness: Use a level to ensure the new bunks are level and the boat is sitting evenly on them. Make any necessary adjustments to the bunk placement or height.
5. Reattach the Boat’s Support Straps: If your boat has support straps, reattach them to the trailer frame.

Lowering Your Boat and Final Checks

1. Remove the Jack Stands: Once you’re satisfied with the new bunk installation, carefully remove the jack stands.
2. Lower the Boat: Slowly lower the boat back onto the trailer using the jack. Be sure to lower it evenly and gradually.
3. Tighten the Boat’s Support Straps: Secure the boat to the trailer using the bow and stern straps.
4. Reattach the Trailer Lights: Reconnect the trailer lights and test them to ensure they are working properly.
5. Final Inspection: Inspect the entire boat and trailer to ensure everything is in good working order. Check the bunks, jack points, and all other components for any damage or loose connections.

Your Boat’s Ready to Roll!

Congratulations! You’ve successfully replaced your boat’s bunks. Following these steps will ensure a smooth and safe process, giving you peace of mind knowing your boat is securely mounted on its trailer.

Information You Need to Know

Q: How often should I replace my boat’s bunks?

A: The lifespan of boat bunks varies depending on usage, weather conditions, and the quality of the wood. As a general rule, it’s a good idea to inspect your bunks annually and replace them every 5-7 years.

Q: Can I use pressure-treated wood for my boat bunks?

A: While pressure-treated wood is durable, it’s not recommended for boat bunks. The chemicals used in pressure-treated wood can damage your boat’s hull. Use marine-grade plywood or composite wood specifically designed for boat trailers.

Q: What should I do if my boat is too heavy for my jack?

A: If your boat is too heavy for your jack, you’ll need to find a larger jack or use a different lifting method. Consider using a professional boat lift or contacting a local boat repair shop for assistance.

Q: Can I use car jacks to lift my boat?

A: It’s not recommended to use car jacks for lifting your boat. Car jacks are not designed for the weight and stability required for supporting a boat. Use jack stands specifically rated for the weight of your boat.

Q: Is it better to replace the bunks in pairs or individually?

A: It’s generally best to replace the bunks in pairs to ensure the boat sits level and stable on the trailer. Replacing them individually can lead to uneven weight distribution.