GPSMAP 392/398/492/498 Owner’s Manual 91
APPENDIX > INSTALLING THE TRANSDUCER
Transom Mount Transducer
The following diagram is for mounting the transducer included with the GPSMAP 392/398/492/498 with transducer package. If the
transducer lead is too short, extension cables are available from your Garmin dealer. DO NOT cut the transducer lead or any part of the
transducer cable, as this will void your warranty. The cable cannot be spliced and connected to any existing (Garmin or non-Garmin)
transducer cables.
NOTE: DO NOT mount the transducer behind strakes, struts, fittings, water intake, or discharge ports, or anything that creates air bubbles or
causes the water to become turbulent. It is important that the transducer is in clean (non-turbulent) water for optimal performance.
Mount the transducer cable cover
well above the waterline.
Transducer should extend 1/8" below the
fiberglass hull or 3/8" below aluminum hull.
Make sure that the transducer is below the water
level when the boat is on plane at high speed.
Do not mount the transducer directly in the path of the prop.
The transducer can cause cavitation that my degrade the boat’s
performance and damage the prop.
Apply marine sealant to all screw threads to
prevent water from seeping into the transom.
Mount the transducer parallel with the water surface.
