Garmin Fishfinder 100 - Manual (Page 10)

2
Installation
Mounting the Transducer
Proper transducer installation is key to getting the best performance
from your new unit. If the transducer lead is too short, extension cables are
available from you GARMIN dealer. DO NOT cut the transducer lead, this
will void your warranty.
Following are some tips and basic installation instructions for three
popular transducers. Detailed installation instructions are provided in the
transducer kits.
Transom Mount Installation
010-10248-00 (depth/temp) Transom Mount Transducer. 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 be in clean (non turbulent)
water for optimal performance.
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.
Make sure that the transducer is
below water level when the boat
is on plane at high speed
Apply marine sealant to all
screw threads to prevent water
from seeping into the transom.
Mount the transducer cable cover
well above the waterline.
Transducer should extend 1/8" below
fiberglass hull or 3/8" below aluminum hull
OK
Mount the transducer parallel with the bottom.