Jacking Up A Partially Sunken Boat: Techniques For Success

Raising a partially sunken boat from a dock can be a challenging task, and it's important to approach it with caution to avoid damage or injury. One method is to use a combination of lifting equipment such as jacks, jack stands, and blocks to support the boat and raise it gradually. This process may involve multiple steps of jacking, repositioning, and blocking to ensure stability. It is crucial to use appropriate materials like wood or concrete blocks and to avoid taking unnecessary risks. Another approach is to use lift bags or drums, either purchased or salvaged, to provide buoyancy and assist in raising the boat. This method often requires additional pumping to remove water from the boat. Before attempting any salvage operation, it is essential to consider the legal implications and obtain any necessary permissions from the boat's owner or relevant authorities.

Use a combination of jacks and jack stands to lift the boat

To lift a boat with a combination of jacks and jack stands, you can start by lowering the front of the trailer all the way down. Place jack stands under the transom and raise the trailer back up. You can then put another jack stand under the keel and lower the trailer, so the boat is now flying free and clear. At this point, you can pull the trailer out from under the boat and work on it without having to crawl underneath. This method is quick and only requires three jack stands and no floor jack.

When using jacks and jack stands, it is important to use wooden cribbing instead of concrete blocks to support the boat's weight. Concrete blocks can be very brittle and crumble under the weight of some boats. Wooden cribbing, such as 6 x 6 timbers and 12" x 12" wooden blocks, provide a more stable and secure support system. It is also crucial to ensure that the blocking or cribbing is solid and secure before proceeding.

Additionally, when using jacks, it is recommended to place a board or pad between the jack and the hull of the boat to distribute the load and prevent damage to the hull. An eight-foot 2x4 can be used along the chine to spread the load. It is also important to watch for any signs of hull deflection or strain when lifting the boat.

For larger boats, it may be necessary to use a combination of jacks and jack stands in different areas of the boat. For example, you can use hydraulic jacks and scissor jacks near the chine to lift the boat. It is also important to consider the weight distribution of the boat and place the jacks and jack stands accordingly.

When raising a partially sunken boat, it is essential to patch any holes and seal any leaks before attempting to lift the boat. This will help to prevent further water intake and stabilize the boat. Additionally, using a pump to remove water from the boat during the lifting process can help reduce the overall weight and make it easier to lift.

Use lift bags to raise the boat

To use lift bags to raise a boat, it is important to follow safety precautions to prevent injury or damage to the boat. Here is a step-by-step guide:

• Ensure you have the necessary equipment: lift bags, an air source such as a pump or air compressor, a knife or tube cutter, screwdrivers, wrenches, and possibly a wheel kit for easier transportation.
• Determine the size and number of lift bags needed based on the size of your boat. Common sizes include 6ft, 7ft, and 8ft systems, each containing two airbags with specific weight capacities.
• Prepare the boat for lifting by ensuring it is empty and secure. Follow any specific instructions provided by the lift bag manufacturer.
• Position the lift bags at the front (bow) and rear (stern) of the boat to provide optimum stability. You can also place them on the sides to balance off-center weights.
• When attaching the lift bags, use sturdy materials such as stainless steel hardware, brass fittings, and hose straps. Ensure the attachment points are secure and can withstand the weight of the boat.
• Begin inflating the lift bags slowly and gradually. Monitor the boat's position and adjust the inflation as needed to maintain stability.
• Once the boat is raised to the desired height, ensure it is securely tethered to a dock or stable structure to prevent it from drifting or sinking again.
• After completing the necessary work or repairs on the boat, you can deflate the lift bags and lower the boat back into the water.

It is important to note that lift bags should not be dragged across the ground to avoid damage. Additionally, they should not be inflated with the boat on the lift, as this can cause harm to the operator and damage to the airbags, lift, or boat. Always follow the specific instructions and safety guidelines provided by the manufacturer of the lift bags and boat lift system.

Use a winch to lift the boat

Using a winch to lift a boat is a common method, especially if you want to use a trailer to get your boat out of the water. Winches use a series of gears to amplify torque on a strap or cable attached to your boat, allowing you to pull it in a controlled manner.

To begin, you'll need to determine the weight of your boat. Take into account the weight of the motor, fuel, and any other items on board. For most standard inland fishing boats, a load capacity of 2,500 pounds should be adequate. Larger boats, such as fiberglass cabin cruisers, speedboats, or sailboats, may require winches that can handle up to 10,000 pounds.

Now, let's discuss the type of winch you should use. You have two main options: manual or electric. Electric winches are more expensive but take on all the work, saving you from cranking the winch yourself. If you have shoulder or back problems, or if your boat is particularly heavy, an electric winch is a good option. When choosing an electric winch, consider your power source. You can connect it to a dedicated battery or install wires that connect directly to your vehicle battery. Keep in mind that setting up an electric winch may require some additional tinkering.

On the other hand, manual winches are more cost-effective and can still get the job done with relative ease. A properly-sized manual winch isn't too difficult to turn, even with a heavy load. However, if you anticipate any challenges with cranking, you may want to opt for an electric winch.

When selecting a winch, also consider the material it is made of, especially if you'll be using it in saltwater. Saltwater can easily corrode zinc-coated steel, so look for powder-coated or aluminum options. Additionally, pay attention to the gear ratio. Lower gear ratios, like 5:1, require more turns of the handle to turn the drum. Two-speed winches offer more flexibility, allowing you to shift from a low gear ratio to a higher one when needed.

Now, let's talk about the process of using a winch to lift your boat. If you're using a trailer, mount the winch on a dedicated winch stand attached to the trailer tongue. Ensure that the winch is securely attached and can handle the weight of your boat. Connect the strap or cable to a sturdy part of your boat, and then begin cranking the winch to pull the boat onto the trailer. Go slowly and carefully to avoid any damage to your boat.

If you're lifting a boat out of the water without a trailer, the process may vary slightly. You may need to use a combination of winches, jacks, and supports to safely lift and support the boat. Always use wood or other supportive materials between the winch and the hull to distribute the weight and prevent damage. Additionally, ensure that the blocking or support under the boat is solid and secure before proceeding.

Remember to take all necessary safety precautions when using a winch to lift a boat. Always use personal protective equipment, such as gloves and eye protection. Ensure that the winch is securely mounted and that the strap or cable is in good condition. Never stand in the path of the boat, and always have a clear escape route in case of any issues.

By following these instructions and taking the necessary precautions, you can safely use a winch to lift a partially sunken boat in a dock.

Use a pump to remove water from the boat

To remove water from a boat, you can use a hand bailer and sponge, which is a classic, effective, economical, and reliable solution. This method is suitable for a variety of small boats, such as canoes and rowboats. It can be faster than an electric pump and is more reliable and less expensive. However, it requires one person to take their hands off other tasks such as rowing or steering.

Another option is a hand pump, which is useful for extracting water from hard-to-reach places or leaky compartments. A portable hand pump is generally not recommended for most situations in a small boat, as a bailer is typically faster and more reliable.

For a hands-free option, consider a suction self-bailing system like the Andersen Self Bailer. This system is mounted in the lowest part of the hull and can be opened or closed as needed. While it works well at high speeds, it may leak at lower speeds, requiring continuous mopping of the bilge.

An electric bilge pump is another effective solution, especially for larger boats or when facing challenging conditions. It is important to ensure that the pump is installed in an accessible location for easy inspection and debris removal. The pump may have a float or switch for automatic activation or a manual switch. Regularly inspect the float switch for corrosion or crust, and test the pump by running a small amount of water into the bilge to ensure it functions properly.

When selecting a bilge pump, consider its capacity, expressed in gallons per hour (GPH). A higher-capacity pump (3,500 GPH or more) is recommended for handling serious situations, while a smaller pump (400-500 GPH) can be used for incidental water. The type of discharge hose can also impact the flow rate, with smooth-wall hoses providing a higher flow rate than corrugated hoses.

Additionally, you can use lift bags or drums to raise the boat and facilitate water removal. This method can be dangerous and requires proper safety precautions. Consult with professionals or experienced individuals for advice on the safest and most effective methods.

Use a tractor to support the boat

Using a tractor to support a boat is a common practice. Tractors are often used to move boats around in tight spaces, such as garages or marinas. When considering using a tractor for this purpose, it is important to match the size and weight of the tractor to the task. A tractor that is too small or lightweight may not have sufficient traction or braking power to handle the weight of the boat and trailer, especially on inclines or slippery surfaces.

For example, a John Deere model in the 2000-3000 series is likely to be suitable for moving a 4000-pound boat and trailer on flat ground, but may struggle on inclines. A larger and heavier tractor, such as a John Deere 4210 or a Farmall "M", may be more appropriate for heavier boats or steep boat ramps. When using a tractor to support a boat, it is also important to ensure that the brakes on the trailer are not locked, as this can cause the tractor to lose control.

In addition to the size and weight of the tractor, the type of tires and their inflation pressure can also affect the tractor's ability to support a boat. Tractor tires with deeper treads or lower inflation pressure can provide more traction on soft or slippery surfaces. Some users also recommend adding weight to the tractor, such as by partially filling the tires with calcium chloride or water, or by adding wheel weights.

When using a tractor to support a boat, it is important to take safety precautions. This includes ensuring that the tractor has sufficient braking power to stop the boat and trailer, especially on steep inclines. It is also important to use proper hitch equipment and to ensure that the boat is securely attached to the tractor. Some users recommend using a hitch on the front of the tractor, as this can provide better control and keep the drive wheels on solid ground.

Overall, a tractor can be a useful tool for supporting a boat, especially in tight spaces or on soft surfaces. However, it is important to match the size and weight of the tractor to the task and to take appropriate safety precautions.

Frequently asked questions