If you do not have an existing NMEA 2000 network on your boat, you will need to install one. For more information about NMEA 2000, visit The GXM 51 antenna must be properly installed according to the following instructions. You need the appropriate fasteners, tools, and mounts listed in each section. These items are available at most marine dealers. Always wear safety goggles, ear protection, and a dust mask when drilling, cutting, or sanding. When drilling or cutting, always check what is on th

DO NOT lubricate the Rubber Washer. J K Fishfi nder 80 2. Route the cable towards the back and slide the transducer into the mounting bracket. 3. Place a 5 mm Flat Washer on the 10-32 x Please read through these instructions thoroughly before attempting installation. Make sure 1.75" screw and insert the screw through you completely understand these instructions before you begin. When in doubt, seek profes the Mounting Bracket, Spacer and Rubber Washer. sional assistance. Be sure the wiring harne

While in Simulator Mode, the Fishfinder displays a bottom scene, and you can control the Fishfinder (except the Gain and Auto Gain options) just as if it were on the water. If no keys are pressed for two minutes, the Fishfinder automatically resets to default settings while in Simulator Mode. To exit Simulator Mode, turn off the Fishfinder. Fishfinder 90/140 Owner’s Manual INSTALLING YOUR FISHFINDER > PACKING LIST INSTALLING YOUR FISHFINDER Make sure you completely read and understand all instru