Mounting Downriggers On Aluminum Boats: Best Places To Install

Mounting downriggers on an aluminium boat can be a challenge, especially if you don't want to drill holes in the boat. Some people opt for clamp-on mounts, but these may not be suitable for longer booms. One solution is to mount the downrigger on a plank of wood that runs across the gunwales, using L-brackets and bolts for stability. Another option is to use concrete anchors or cannon pedestals, which can be attached to bench seats or centre seats. For small boats, removable downriggers are a good choice, and Scotty products are recommended for their ability to make tight turns. When mounting downriggers, it's important to consider the placement carefully to ensure they don't get in the way while fishing. Isolating the downriggers from the boat with rubber can also increase your catch rate by reducing noise and vibration.

Mounting downriggers on a small aluminium boat

Selecting the Right Mounting Hardware

Firstly, ensure you select suitable mounting hardware for your small aluminium boat. Downrigger mounts should be sturdy and designed for the specific type of boat and its gunwales. Consider the weight of the downriggers and the forces they will exert when in use.

Placement and Positioning

The placement of downriggers on a small boat is crucial. Consider where the downrigger will be most practical and convenient for fishing. You want to be able to reach and operate it easily without it getting in the way. Positioning the downrigger as far back as possible can be advantageous, keeping the cables away from the motor and providing more room to fight and land fish. However, ensure the cables don't interfere with the motor during tight turns.

Mounting Techniques

Now, let's discuss some specific mounting techniques for small aluminium boats:

• Using Bench Seats: One common method is to utilise the bench seats in your boat. You can remove the wooden top of a bench seat, reinforce the structure underneath, and then remount the seat with the downrigger attached to it. This provides a sturdy base for the downrigger while keeping it accessible.
• Clamping: If you want a removable option, consider using clamp-on mounts. These can be clamped directly onto the gunwales of your boat without the need for drilling holes. However, ensure your gunwales are not too wide for the clamps, and be cautious of potential slippage.
• Brackets and Plates: Another approach involves using L-brackets and plates for mounting. You can attach L-brackets to the boat's gunwales for stabilisation and then mount a sturdy plate (e.g., marine plywood) onto the brackets. Finally, mount the downrigger onto the plate. This method provides a solid base and allows for easy removal of the downrigger.
• Reinforcement and Bracing: When mounting downriggers, consider reinforcing the structure of your boat to handle the added weight and forces. For example, you can add aluminium strips or plates to distribute the load and prevent lifting or deformation of the gunwales. Additionally, consider adding braces or supports that tie into the boat's structural elements, such as vertical seat supports.
• Pedestals: Pedestals can be used to mount downriggers by installing them onto the centre seat of the boat. You can remove the plywood top of the seat, fasten the pedestal bases with bolts, washers, and nuts, and then remount the plywood. This provides a stable platform for the downriggers while utilising the existing seat structure.

Mounting downriggers on a flat-top-surface gunwale

When mounting downriggers on a flat-top-surface gunwale, it is important to consider the weight and pressure exerted by the downrigger and take the necessary steps to reinforce the mounting area. Here are some detailed instructions and considerations for mounting downriggers on a flat-top-surface gunwale:

Planning the Mounting Location:

Before mounting downriggers, it is important to consider the layout and design of the boat. Determine the desired location for the downriggers, taking into account factors such as fishing convenience and practicality. Consider the width of the gunwale and ensure that the downrigger mounts will fit securely without interfering with other boat components.

Reinforcing the Mounting Area:

To reinforce the flat-top-surface gunwale and distribute the weight of the downrigger, consider using a sturdy backing plate or support structure. Options for backing plates include plywood, aluminium plate, or marine-grade plywood. For aluminium boats, consider using through holes with a backing plate. For fiberglass boats, ensure that the mounting area has strong and wide backing to prevent cracking. Consider using washers, wellnuts, rivnuts, or nutserts for a secure fit.

Mounting the Downriggers:

Several mounting options are available for downriggers on flat-top-surface gunwales:

• Tracks and Rails: Consider using tracks or rails, such as the Bert's track, to provide flexibility in downrigger placement. Tracks can be bolted to the gunwale with a plywood backing plate underneath.
• Flush-Mounts: Flush-mounts are suitable for flat, horizontal surfaces like gunwales. The Burnewiin GM650 and GM400 are examples of flush-mounts, but ensure the gunwale can support the weight.
• L-Brackets: L-shaped brackets can be attached to the side of the gunwale, extending over the top, and then the downrigger bracket can be mounted on top.
• Gimbal Mounts: Gimbal mounts provide a clean look and are suitable if there is sufficient support through the top of the gunwale.
• Clamps: Clamp-on mounts are an option if you want to avoid drilling holes, but they may not be suitable for longer booms.
• Pedestals: Pedestals can be installed by removing the plywood top of a bench seat and fastening the bases through with bolts, washers, and nuts.
• Swivel Mounts: Swivel mounts, such as the Cannon swivel mounts, provide flexibility in use and can be removed, leaving a relatively flush surface.

When mounting downriggers, ensure that the mounting hardware is sturdy and designed for heavy-duty use. Consider the weight and pressure exerted by the downrigger and take the necessary steps to reinforce the mounting area to avoid damage to the boat.

Using a clamp-on mount for downriggers

Another option for a clamp-on mount is to use a thick L-bracket with pre-drilled holes. You can attach two bolts to the side of the bracket for stabilization and then mount the downrigger bracket to that. This type of mount can be purchased at hardware stores or online.

If you have a transom on your boat, you can use a clamp-on mounting base specifically designed for this purpose. Big Jon's "Clamp-On Mounting Base" will fit transoms up to 2 inches thick and is made of machined aluminum to provide a secure mount for your downriggers. This option typically costs around $40.

When considering a clamp-on mount for your downrigger, it's important to think about the weight of your downrigger and the amount of tension created when hanging a weight on the boom. For example, one user reported that they used concrete anchors and drilled into their bench seat to create a secure mount for their downrigger.

Overall, a clamp-on mount is a good option for those who want to avoid drilling holes in their boat or who have gunwales that are too wide for the downrigger. There are a variety of options available, and it's important to choose one that is strong enough to support the weight of your downrigger and any additional tension created during use.

Reinforcing downrigger mounts

• Using Backer Plates: Installing a backer plate underneath the gunwale where the downrigger is mounted can help distribute the weight more evenly and reduce the stress on the gunwale. It is recommended to use a 1/4-inch aluminium backer plate to provide additional support.
• Extending the Track Length: Instead of mounting the downrigger on a small area, consider using a longer track and backer plate. This will spread the load over a larger area, reducing the stress on any single point.
• Bolting Instead of Screwing: To ensure a more secure connection, consider using bolts instead of screws to attach the mount to the gunwale. Bolts provide a stronger hold and are less likely to wiggle loose over time.
• Using Appropriate Hardware: Ensure that you are using appropriate hardware for your boat and downrigger setup. Some hardware stores may not carry stock that is heavy-duty enough for your needs. Seek out specialised fishing or marine hardware stores to find suitable mounting hardware.
• Reinforcing with Plates and Brackets: In some cases, you may need to reinforce the structure of your boat to accommodate the downrigger. This can be done by using plates and brackets to distribute the weight more effectively. For example, you can attach a mounting plate to the angle stock used by the manufacturer to stiffen the sides of the boat.
• Using a Different Mounting Location: If you are concerned about the strength of your gunwale, consider mounting the downrigger in a different location. Some options include using a bench seat, a pedestal mounted to the centre seat, or a clamp-on mount. These alternatives may provide a more secure mounting option.

When reinforcing downrigger mounts, it is crucial to consider the specific design of your boat and downrigger. Consult with experts or experienced boaters for advice specific to your situation.

Using Scotty products for mounting downriggers

When it comes to using Scotty products for mounting downriggers on an aluminium boat, there are several options and considerations to keep in mind. Firstly, Scotty offers a range of downrigger mounting systems that can be configured to suit your boat. You can choose from various Scotty downrigger mounting systems to find the perfect setup for your vessel.

One popular option is to use a Scotty swivel base mount. This provides flexibility in positioning your downrigger. Some users suggest mounting it in front of the rail on the gunwale, as having the downrigger all the way at the stern might not be ideal. Mounting it too far back can make it difficult and unsafe to work with the gear, while placing it too far forward can result in tangles as the bow turns sharper than the stern. Therefore, a position that balances accessibility and manoeuvrability is key.

Another consideration is the weight of the downrigger. For example, if you're using 15-pound weights and fishing at depths of 70-150 feet, a Scotty 1106B model is recommended over the 2106B, as the former is more suitable for your weight and depth range.

Additionally, you can explore the option of rail mounts, which are easy to install and remove. This type of mount provides flexibility in positioning your downrigger further forward or aft, depending on your preferences. However, some users have expressed concerns about the stability of rail mounts for heavier weights.

When deciding on a mounting location, it's important to consider the convenience and practicality of fishing. You want to ensure that the downrigger is accessible and doesn't hinder your ability to work with the gear. Think about the placement in relation to the person netting the fish, especially when targeting species like salmon.

Security is also a factor to consider. Opportunistic thieves may target downriggers, so securing them with a cable and lock can be a good idea. Additionally, reinforcing the mounting area with stainless steel or aluminium plates can enhance stability and provide peace of mind.

Frequently asked questions