OWNER’S GUIDE

&

INSTALLATION INSTRUCTIONS

Transom Mount, 1kW, Depth Transducer

 

 

 

Record the information found on the cable tag for future reference.

with Release Bracket

 

 

Part No.________________ Date___________ Frequency________ kHz

 

 

 

 

Models: TM258, TM260, TM270W

01/09

 

WARNING: Always wear safety goggles and a dust

 

rev. 01

mask when installing to avoid personal injury.

CAUTION: Never pull, carry, or hold the transducer by

-02

the cable as this may sever internal connections.

17-299

CAUTION: Do not strike the transducer to release it.

 

 

When mounted on the bracket, remove the transducer

 

by removing the locking pin and hinge pin.

 

CAUTION: Never use solvents. Cleaners, fuel,

 

sealants, paint, and other products may contain strong

 

solvents, such as acetone, which attack many

 

plastics, greatly reducing their strength.

 

IMPORTANT: Please read the instructions completely

 

before proceeding with the installation. These

 

instructions supersede any other instructions in your

 

instrument manual if they differ.

 

 

Applications

Recommended for outboard and inboard/outboard sport fishing powerboats, 8m (25') and up

Not recommended for inboard powerboats

Not recommended for stepped hulls

Adjusts to transom angles from 3°–21°

Bracket protects the transducer from frontal impact only

Tools & Materials

Safety goggles

Dust mask

Angle finder

Masking tape (some installations)

Pencil

 

Electric drill

 

Drill bits:

 

Bracket holes

5mm, #4, or 7/32"

Transom hole (optional)

18mm, 11/16", or 3/4"

 

21mm or 13/16" (Furuno, Raymarine only)

Cable clamp holes

3mm or 1/8"

Marine sealant (suitable for below waterline) Socket wrench

Straight edge Small screwdriver Grommets (some installations) Cable ties

Water-based anti-fouling paint (mandatory in salt water)

TM260 with shims

in operational position

Mounting Location

General Guidelines

CAUTION: Do not mount the transducer in an area of turbulence

or bubbles: near water intake or discharge openings; behind strakes, struts, fittings, or hull irregularities.

CAUTION: Avoid mounting the transducer where the boat may be supported during trailering, launching, hauling, or storage.

For best performance, the transducer must be in contact with aera- tion-free and turbulence-free water. To identify an area of smooth water, observe the flow off the transom while the boat is underway.

Allow headroom space above the bracket for it to release and rotate the transducer upward.

Mounting on the side of the transom where the propeller blades are moving downward is preferred (see Figure 1).

Mount the transducer as close to the centerline (keel) of the boat as possible to ensure the transducer’s face remains in the water when the boat is turning. However, keep in mind that it should be a minimum of 15 cm (6") beyond the swing radius of the propeller, so the water passing over the transducer does not cause a flow disturbance to the propeller.

NOTE: Starboard

side of hull where

propeller blades are

moving downward

is prefered.

parallel to

waterline

hull projection

0–3mm (0–1/8")

15cm (6")

minimum beyond

swing radius

Figure 1. Mounting location on single drive boat

Copyright © 2009 Airmar Technology Corp.

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Furuno 525TID-TMD installation instructions Applications, Tools & Materials, Mounting Location, General Guidelines