Converting Inboard To Outboard: Is It Possible?

Converting an inboard boat to an outboard vessel is possible, but it requires meticulous work and a good investment. The process involves modifying the vessel to accommodate the outboard engine, including creating space for the engine and adjusting the bunk brackets of the boat trailer. Additionally, the old jet pump or inboard pump steering will need to be replaced with a hydraulic steering system. While the process seems straightforward, it is important to consult experts to ensure the boat's structural integrity and optimal performance.

Seek advice from an experienced boat dealer

Converting an inboard boat to an outboard configuration is a complex process that requires meticulous planning and execution. While it is possible to perform this conversion, it is important to seek advice and guidance from an experienced boat dealer to ensure a successful outcome.

Experienced boat dealers have the necessary knowledge and expertise to guide you through the entire process. They can provide valuable insights and recommendations specific to your boat model and the type of conversion you intend to undertake. This personalized advice will help you make informed decisions and avoid costly mistakes.

Dealers can help you understand the structural modifications required to accommodate the outboard engine. This includes assessing the transom, creating space for the engine, and mounting a compatible hydraulic steering system. They can also advise on adjusting the bunk brackets of the boat trailer, ensuring that your setup is safe and secure.

Additionally, boat dealers have access to a wide range of outboard motors and can guide you in selecting the most suitable model for your boat. They will consider factors such as engine size, power requirements, and your intended use to help you make an informed decision. This guidance will ensure that your new outboard engine meets your performance expectations and enhances your overall boating experience.

By seeking advice from an experienced boat dealer, you can also gain a better understanding of the potential challenges and drawbacks of the conversion. They can inform you about the impact on weight distribution, handling, and performance. Dealers can also provide estimates for the cost of the conversion, which can vary depending on several factors, including the type of boat, engine selection, and marine services required.

In conclusion, consulting with an experienced boat dealer is a crucial step when considering converting an inboard boat to an outboard configuration. Their expertise, guidance, and access to resources will ensure a smooth and successful conversion process, allowing you to fully enjoy the benefits of your new outboard engine.

Modify the vessel to accommodate the outboard engine

Modifying the vessel to accommodate the outboard engine is a complex process that requires careful planning and execution. Here are the key steps to follow:

Inspect the Transom

The transom, or the back panel of the boat, will need to be inspected and modified to accommodate the outboard engine. It is crucial to ensure that the transom is strong enough to support the weight of the outboard engine. In some cases, it may be necessary to reinforce or rebuild the transom to handle the additional weight.

Create Space for Glassing an I/O Plug

The next step is to create space for glassing an I/O plug in the transom. This involves cutting an opening in the transom and installing a plug that will provide a secure mounting point for the outboard engine. The size and shape of the opening will depend on the specific outboard engine being installed.

Mount a Hydraulic Steering System

The old jet pump or inboard pump steering system will not work with the outboard engine. Therefore, it is necessary to mount a hydraulic steering system. This will involve installing hydraulic lines, a steering helm, and a steering cylinder or ram. It is important to ensure that the steering system is compatible with the outboard engine and provides smooth and responsive handling.

Adjust the Bunk Brackets

The service team will need to adjust the bunk brackets of the boat trailer to ensure that the boat sits correctly on the trailer with the new outboard engine installed. This step is crucial to ensure the safety and stability of the boat during transport.

Finalize the Outboard Motor Model

Once the modifications to the vessel are complete, it is important to finalize the selection of the outboard motor model. Consult with marine professionals or dealerships to determine the most suitable outboard motor for your boat, taking into account factors such as power, weight, and performance.

Mount the Outboard Engine

Finally, the marine professionals will help you mount the selected outboard engine onto the transom of the boat. They will ensure that the engine is securely attached and aligned correctly. This step requires careful measurement and precision to avoid any issues with the boat's handling and performance.

It is important to note that converting an inboard boat to an outboard configuration requires a significant investment and can impact the boat's handling and performance. Therefore, it is crucial to consult with seasoned professionals and consider the specifications and requirements of the conversion before proceeding.

Replace the old jet pump or inboard pump steering

The old jet pump or inboard pump steering will not work with an outboard engine, so it will need to be replaced.

Firstly, you will need to thoroughly examine the transom. It is recommended to visit an experienced boat dealer who can help you understand the process and its outcome.

Once you have a good understanding of the process, you can begin modifying the vessel to accommodate the outboard engine. This will involve creating a space for glassing an I/O plug in the transom and mounting a hydraulic steering system.

• Thoroughly examine the transom and understand the process: Before beginning any work, it is important to have a clear understanding of the task at hand. Consult with an experienced boat dealer to gain insights and guidance on the conversion process.
• Modify the vessel to accommodate the outboard engine: This step involves creating the necessary space and structures to mount the outboard engine.
• Create a space for glassing an I/O plug: You will need to glass an I/O plug into the transom, so ensure you have the necessary materials and tools for this process.
• Mount a hydraulic steering system: As the old steering system will not work with the new outboard engine, you will need to install a hydraulic steering system. Ensure you select a compatible and suitable system for your boat.
• Adjust the bunk brackets of the boat trailer: This step is crucial to ensure the boat trailer is properly aligned and adjusted to accommodate the new steering system and outboard engine.

By following these steps and working with marine professionals, you can successfully replace the old jet pump or inboard pump steering and mount the outboard engine on the transom. Remember, this process requires a good investment and should be done correctly to avoid worsening the boat's performance.

Adjust the bunk brackets of the boat trailer

Adjusting the bunk brackets of the boat trailer is an essential step in ensuring your boat's load is carried correctly. This process involves several steps and considerations to ensure the structural integrity of your boat. Here is a detailed guide to help you adjust the bunk brackets of your boat trailer:

Step 1: Check the Keel Rollers

Before making any adjustments, it is crucial to inspect the keel rollers on your boat trailer. Keel rollers support and stabilize your boat, carrying up to 70% of its weight. To determine if your boat rests on the keel rollers properly, climb or position yourself under the trailer. If this is not feasible, use a wrench to loosen the brackets and move them upwards, starting from the front to the rear. Ensure that the rollers at the front of the trailer are slightly higher than those at the back to facilitate easier launching and adapt to the shape of your boat's keel.

Step 2: Make the Necessary Adjustments

Once the keel rollers are correctly positioned, you can start making adjustments to the bunk brackets. Loosen the brackets and raise them so that the bunks rest on the boat's hull. Begin at the front of the boat trailer and then repeat the process for the rear bunk brackets. Ensure that the trailer bunks are resting approximately one-third from the bottom of the boat's hull. This step should be performed on both sides of the boat.

Step 3: Check for Stability

After making the adjustments, carefully observe if your boat is sitting steadily on the entire bunk and keel rollers. If your vessel is unsteady or wobbly, you will need to re-adjust the brackets. Identify which part of the boat is unstable and make the necessary corrections.

Step 4: Pay Attention to the Transducer

If your boat has a transom-mount or thru-hull transducer, ensure that the trailer bunks are firmly positioned and do not come into contact with the transducer. In rare cases, you may need to move the transducer to make way for the boat trailer to fit correctly.

Step 5: Consider the Bow Pulpit

A bow pulpit is a narrow platform extending from the front of the boat. It can be functional or cosmetic and often supports an anchor davit. When adjusting the bunk brackets, ensure that the hull is supported correctly during loading and unloading to prevent the pulpit from hitting the winch stand. Bow guide boards can be used to mitigate this issue.

Step 6: Understand the Engine Configuration

There are two types of inboard engine configurations: V-drive and straight shaft. The V-drive engine configuration is optional and placed at the trailer's rear, providing additional support for the engine weight. On the other hand, the straight shaft configuration pushes the engine forward and helps position the trailer's axle to achieve the proper tongue weight.

Step 7: Regular Maintenance

As a responsible boat owner, it is essential to maintain all parts and accessories in optimal condition. Regularly check the stability of the bunk brackets and make adjustments as necessary. Keep your fingers away from the space between the boat and the bunks during adjustments to prevent injury.

Mount the outboard motor on the transom

Mounting an outboard motor on the transom is a meticulous process that requires careful consideration to ensure the structural integrity of the boat. Here are some detailed steps and instructions for mounting an outboard motor on the transom of an inboard boat:

Firstly, it is essential to examine the transom thoroughly. This includes checking the condition of the transom, assessing its strength, and ensuring it can withstand the weight and torque of the outboard motor. If there are any signs of damage, rot, or delamination, it is crucial to address these issues before proceeding.

Next, modifications must be made to accommodate the outboard engine. This involves creating space by glassing an I/O plug in the transom and mounting a hydraulic steering system. The old jet pump or inboard pump steering will need to be replaced as they will not work with the new outboard setup. Additionally, adjustments to the bunk brackets of the boat trailer may be necessary to ensure compatibility with the new configuration.

When selecting an outboard motor, it is important to consider the weight and size of the engine. The transom will need to be reinforced to hold the weight, and the stringers may need to be reconfigured to handle the torque and weight distribution. This step may require professional assistance to ensure the structural integrity of the boat.

After the necessary modifications have been made, the outboard motor can be mounted on the transom. This process typically involves bolting a custom-built bracket to the transom and then attaching the outboard motor to the bracket. It is crucial to ensure that the bracket is securely attached and can withstand the forces exerted by the outboard motor during operation.

Finally, it is essential to test the setup thoroughly. Take the boat out on the water and monitor its performance, handling, and weight distribution. Pay close attention to any signs of stress or flexing, particularly in the transom and stringers. If issues arise, you may need to make further adjustments or reinforcements to ensure the safety and performance of the boat.

Frequently asked questions