Transducer Placement On A Crestliner V Boat: Best Spots

When it comes to boats, it's important to get the setup just right. In this case, we're talking about the best place to put a transducer on a Crestliner V boat. A transducer is a device that converts sound waves into electrical signals, helping you to measure the depth of the water and locate fish. It's an essential tool for fishing with sonar, as it allows you to see what's beneath the surface. So, where should you put it? Well, it depends on a few factors, including the type of transducer and the kind of fishing you'll be doing. But generally, you'll want to mount it as close to the water as possible without obstructing your trolling motor. This will ensure you get the best sonar readings.

Now, let's get into the specifics of the Crestliner V boat. One owner of this boat model has recommended using a transom-mounted transducer, which is installed directly behind the trolling motor. This type of transducer is easy to install and maintain, but it can be affected by the turbulence created by the motor, leading to inaccurate readings. Another owner has suggested using a transducer plate and a level when mounting the transducer to ensure it's level with the waterline. They also recommend using marine-grade silicone to keep water out of the boat. So, if you're looking to install a transducer on your Crestliner V boat, these are some great tips to keep in mind!

Transom-mounted transducers

When installing a transom-mounted transducer, it is important to use a mounting plate to minimise drilling into your transom. Commercially available options include screw-on Starboard plates and stick-on plates, or you can make your own out of Starboard or expanded PVC. It is also crucial to measure the length of your screws and mark the necessary depth on your drill bit to avoid drilling too deep. Always tighten screws by hand to avoid stripping.

To ensure a watertight seal, chamfer and seal the holes with a quality marine sealant approved for below-waterline use. This will help prevent gelcoat cracking and water penetration. When positioning the transducer, it is important to get the bottom parallel with the hull bottom, either flush with the hull or 1/8" below. Lowering the "tail" end of the transducer a few degrees can improve performance at speed.

In-hull transducers

When choosing the location for an in-hull transducer, it is crucial to ensure that there are no external strakes, intakes, or other hull features that could cause aerated water to flow over the transducer's location. The location depends on the type of hull and propulsion. For inboard planing hulls, the best spot is just ahead of the engines and prop shafts. Displacement hulls allow for positioning farther forward. For outboards and sterndrives, an aft location is optimal, except for step hulls, which require placement forward of the steps. Locate the transducer as close to the center line as possible.

To install an in-hull transducer, first, choose the location and test the transducer's performance at that spot. Mark the mounting location on the hull and prepare the surface by sanding and cleaning it with isopropyl alcohol. Apply a bonding agent, such as Marine-Tex Epoxy Putty or 3M 5200 Marine Adhesive/Sealant, and secure the base of the transducer to the inside of the hull. Once the bonding material has cured, pour propylene glycol (non-toxic antifreeze) into the housing and lubricate the O-ring with petroleum jelly. Place the transducer into the housing, ensuring it is level with the water, and secure it with screws. Finally, route the cable to the fish finder and plug it in.

Transducer installation tips

Transducers are essential for fishing with sonar, as they allow you to see what’s beneath the surface of the water. They are typically mounted on the hull of a boat, but there are a few different places you can mount one on a pontoon boat.

Choosing the Right Transducer

When choosing a transducer, consider the type of fishing you'll be doing, the depth of the water, and the size of your boat. If you're only fishing in shallow water, you can opt for a smaller, less expensive transducer. However, if you'll be fishing in deep water or targeting large fish, you'll need a larger, more powerful transducer.

Mounting Location

The best place to mount a transducer on a pontoon boat depends on the type of transducer and the features you want to use. For trolling motors, mount the transducer on the transom, as close to the water as possible. For fishfinders, you can mount the transducer on the transom, the bow, or the side of the boat, depending on your preferences and needs.

Installation Process

• Choose a mounting location that is as close to the water as possible without interfering with your trolling motor.
• Mark the mounting location on the hull.
• Drill a hole in the hull at the marked location.
• Use a mounting plate to minimize drilling into your transom. Commercially available screw-on Starboard plates or stick-on plates can be used, or you can make your own out of Starboard or expanded PVC.
• When drilling holes, avoid going too deep by measuring the length of your screws and marking the necessary depth on your drill bit with tape.
• Tighten screws by hand to avoid stripping. Do not use electric drivers, especially when working with fiberglass.
• To prevent gelcoat cracking, run your drill in reverse until the bit reaches the fiberglass, then use a countersink to chamfer the edges around the hole.
• Seal the installation by coating screws and filling pilot holes with a quality marine sealant approved for below-waterline use.
• Level your transducer with the transom waterline. This ensures the bottom of the transducer is parallel to the bottom of the hull.
• Connect the transducer to the fishfinder or sonar device.

Maintenance

To keep your transducer in good working condition, regular maintenance is important. Clean the transducer regularly with a soft cloth, ensuring it is free of dirt, debris, and marine growth. Check the transducer for any damage and replace it if necessary.

Transducer placement for best performance

Transducers are typically mounted on the hull of a boat, but there are a few different places you can mount one on a pontoon boat. The best place to mount a transducer depends on the type of transducer you have and the features you want to use.

For trolling motors, the transducer should be mounted on the transom, as close to the water as possible. For fishfinders, the transducer can be mounted on the transom, the bow, or the side of the boat. The best location for your transducer will depend on your individual needs and preferences.

If you have a Crestliner boat, there are a few things to keep in mind when mounting a transducer. Firstly, Crestliner boats have a transom bracket built into them for mounting the transducer. When mounting the transducer, make sure it is between the ribs on the bottom of the boat. The transducer will have a line in the middle where the top and bottom half meet; this line should be level with the bottom of the boat.

Another option for mounting a transducer on a Crestliner boat is to use a mounting plate. This allows for fine-tuning the position of the transducer without drilling new holes in the transom. Screw-on and stick-on mounting plates are commercially available, or you can make your own out of Starboard or expanded PVC. When drilling holes in the transom, use a wrap of painter's tape on the drill bit to mark the necessary depth and avoid drilling too deep.

It is also important to use the right type of screws and sealant when mounting a transducer. Avoid using electric drivers as they can strip the screws; instead, tighten the screws by hand. Seal the installation by coating screws and filling pilot holes with a quality marine sealant approved for below-waterline use.

By following these tips, you can ensure that your transducer is mounted in the best location for optimal performance.

Transducer mounting plates

There are a variety of transducer mounting plates available on the market, including screw-on and stick-on options. You can also make your own out of starboard or expanded PVC. When choosing a mounting plate, it is important to consider the size and type of your transducer, as well as the material and thickness of the mounting plate.

For example, some mounting boards are made from 1" thick black HDPE plastic, which is non-UV sensitive and groove-backed. This material is strong enough to hold a $300+ transducer and allows for the use of a 1" long mounting screw, creating a rock-solid mounting. The groove on the back of the board also helps to create a clean install and a nice gasket for better waterproofing.

When installing a transducer mounting plate, it is important to follow the manufacturer's instructions carefully. It is also recommended to use a high-quality pure silicone ("Marine Grade" or 100%) for sealing, as it has better sealing properties and adheres perfectly to the HDPE for a lifelong leak-free installation.

Frequently asked questions