Garmin GPSMAP 188C Owner's Manual page 103

Transom Mount Transducer
The following diagram is for mounting the transducer included with the GPSMAP 188/188C Sounder 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.
GPSMAP 188/188C Sounder Owner's Manual
Apply marine sealant to all
screw threads to prevent water
from seeping into the transom.
OK
Mount the transducer parallel with the bottom.
A
PPENDIX
Mount the transducer cable cover
well above the waterline.
Transducer should extend 1/8" below
fiberglass hull or 3/8" below aluminum hull
Make sure that the transducer is
below water level when the boat
is on plane at high speed
Do not mount transducer directly in the
path of the prop. The transducer can cause
cavitation that may degrade the boat's performance
and damage the prop.
> I T
NSTALLING THE RANSDUCER
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