Select an area within one foot of the center keel of the boat and directly in front of the bottom corner of the transom. This area is often near the drain plug. Your goal is to select an area that is between ridges or rivets preferably on the Driver's side of the boat. You need to select an area of the hull that does not have a dent or depression that might create a pocket of air while the boat is running at higher speeds. A simple straight edge ruler can be used on the bottom of your hull to ensure you have selected a non- warped area.
Set the transducer in the prepared area and place four supplied foam positioning pads around the transducer as shown. This will keep the transducer from "traveling" once the transducer has been placed in your target spot. The special A.C.E. Adhesive will set in about 30 minutes. Try not to move the boat around during this period. The foam cubes you placed around the transducer keep it from drifting from the spot you have selected while the adhesive cures overnight. Do not turn your sonar "on" for 12 hours to ensure a solid connection between the transducer and the aluminum hull.