Posts: 226
Location: W. PA. | I agree that it is more than likely a problem with the transducer placement, but installing it with half above the transom and half below is incorrect. You want your transducer as deep in the water as possible at all times but at least 12" away from the lower unit. Here is part of the installation instructions from Lowrance's website.
"Make certain the transducer's location doesn’t interfere with the trailer or hauling of the boat. Also, don’t mount it closer than approximately one foot from the engine’s lower unit. This will prevent cavitation interference with the propeller. Typically, the transducer should be mounted as deep in the water as possible. This increases the chance that it will be in the water in high speed and reduces the possibility of air bubble interference."
Basically you want to move over a foot from the lower unit and make sure there are no rivets or anything else on the bottom of the hull in that spot. If there are then move toward the outside of the boat enough to clear them and mount it as deep as possible. Also make sure it's not too close to your bunks. |
