2.Apply sealant to the threads of the remaining screw to prevent water seeping into the transom.

3.Fasten the stabilizing screw into place with a socket wrench. For clear access to the screw, remove the transducer assembly from the bracket (see Figure 4). When reattaching the transducer, be sure to include the spacer.

Cable Routing

Route the cable over the transom for a detachable installation. For permanent mounting, route the cable through a drain hole or through a new hole drilled in the transom above the waterline.

CAUTION: Do not remove the connector to ease cable routing. If the cable must be cut and spliced, use Airmar’s splash-proof Junction Box No. 33-035 and follow the instructions provided. Removing the waterproof connector or cutting the cable, except when using a water-tight junction box, will void the sensor warranty.

1.If a hole must be drilled through the transom, choose a location well above the waterline (see Figure 7). Check for obstructions such as trim tabs, pumps, or wiring inside the hull. Mark the location with a pencil. Drill the hole using the appropriate size bit to accommodate the connector.

Fiberglass hull—Minimize surface cracking by running the drill in reverse until the gelcoat is penetrated.

2.Route the cable over or through the transom.

3.On the outside of the hull, secure the cable against the transom using the cable clamps. Position one cable clamp 30cm (12") above the bracket. Mark the mounting hole with a pencil.

4.Position the second cable clamp halfway between the first clamp and the cable hole. Mark this mounting hole.

5.If a hole has been drilled through the transom, open the large slot in the transom cable cover. Position the cover over the cable where it enters the hull. Mark the two mounting holes.

6.At each of the marked locations, use a 3mm or 1/8" bit to drill a hole 10mm (3/8") deep. To prevent drilling too deeply, wrap masking tape around the bit 10mm (3/8") from the point.

7.Apply marine sealant to the threads of the #6 x 1/2" self-tapping screw to prevent water from seeping into the transom. Position the two cable clamps over the cable and fasten them in place.

8.If you have drilled a hole through the transom, apply marine sealant to the space around the cable where it passes through the transom. Push the cable cover over the cable and screw it in place.

9.Route the cable to the instrument being careful not to tear the cable jacket when passing it through the bulkhead(s) and other parts of the boat. Use grommets to prevent chafing. To reduce electrical interference, separate the transducer cable from other electrical wiring and the engine(s). Coil any excess cable and secure it in place with cable ties to prevent damage.

10.Refer to your echosounder owner’s manual to connect the transducer to the instrument.

Checking for Leaks

WARNING: Do not leave the boat in the water unchecked for several days. When the boat is placed in the water, immediately check for leaks around the screws and any other holes drilled in the hull. Note that very small leaks may not be readily observed.

cable cover

cable clamp

30cm (12")

Figure 7. Cable routing

Copyright © 2009 Airmar Technology Corp.

Maintenance

Anti-fouling Paint

CAUTION: Do not paint the exposed temperature button. Doing so will slow the sensor’s response time.

Aquatic growth can accumulate rapidly on the transducer’s surface reducing performance within weeks. Surfaces exposed to salt water that do not interlock must be coated with anti-fouling paint. Use water-basedanti-fouling paint only. Never use ketone- based paint, since ketones can attack many types of plastic possibly damaging the transducer. Repaint every 6 months or at the beginning of each boating season.

Cleaning

CAUTION: Do not use a lubricant on the bracket; grit will stick to it increasing friction and wear.

Clean the sensor with a Scotch-Brite® scour pad and mild household detergent taking care to avoid making scratches. If the fouling is severe, lightly wet sand with fine grade wet/dry paper.

Parts

The information needed to order a replacement transducer is printed on the cable tag. Do not remove this tag. When ordering, specify the part number, date, and frequency in kHz. For convenient reference, record this information on the top of page one.

Lost, broken, or warn parts should be replaced immediately.

Bracket Assembly

33-749-01

Obtain parts from your instrument manufacturer or marine dealer.

Gemeco

Tel:

843.210.7000

(USA)

Fax:

843.210.7170

 

email: sales@gemeco.com

Airmar EMEA

Tel:

+33.(0)2.23.52.06.48

(Europe, Middle East, Africa)

Fax:

+33.(0)2.23.52.06.49

email: sales@airmar-emea.com

AIRMAR®35 Meadowbrook Drive, Milford, New Hampshire 03055-4613, USA

TECHNOLOGY CORPORATION

www.airmar.com

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Copyright © 2009 Airmar Technology Corp. All rights reserved.

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Furuno 525TID-TMD installation instructions Checking for Leaks, Maintenance