New Transducers SS505 User Manual

WARNING: A High-Performance Fairing must be 

installed following the installation instructions that 

accompany the fairing. A High-Performance Fairing 

requires an anti-rotation bolt to keep the fairing from 

turning while the boat is underway.
WARNING: Always wear safety goggles and a dust 

mask when installing.
WARNING: Immediately check for leaks when the 

boat is placed in the water. Do not leave the boat 

unchecked for more than three hours. Even a small 

leak may allow considerable water to accumulate.
CAUTION: CHIRP transducer—Always operate the 

transducer in water. Operating in air will allow the 

transducer to overheat resulting in failure.
CAUTION: Bronze transducer—Never mount in a 

metal hull, because electrolytic corrosion will occur.
CAUTION: Stainless steel housing in a metal hull 

requires using a Fairing Kit to isolate the stainless 

steel transducer from the metal hull. Failure to do so 

will cause electrolytic corrosion.
CAUTION: Never install a metal transducer on a 

vessel with a positive ground system.
CAUTION: Never pull, carry, or hold the transducer by 

the cable as this may sever internal connections.
CAUTION: Never strike the transducer.
CAUTION: Never use solvents. Cleaners, fuel, sealant, 

paint and other products may contain solvents that can 

damage plastic parts, especially the transducer’s face.
IMPORTANT: Read the instructions completely 

before proceeding with the installation. These 

instructions supersede any other instructions in your 

instrument manual if they differ.

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Thru-Hull, Depth with Stem

Models: B45, B258, B260, B265LH, B265LM, B271W

U.S. Patent No. 7,369,458. UK Patent No. 2 414 077. U.S. Patent Pending

• Bronze transducer recommended for fiberglass or wood hull only.

• Stainless steel transducer compatible with all hull materials.

Recommended for aluminum hulls to prevent electrolytic corrosion 
provided the stainless steel transducer is isolated from the metal hull.

The model name is printed on the cable tag.

Safety goggles
Dust mask
Electric drill
Drill bits and hole saws:

Pilot hole

3mm or 1/8"

B45, SS505

22mm or 7/8"

B258, B271W, SS258

30mm or 1-3/16"

B260, B265LH/LM, SS260, SS270W

33mm or 1-5/16"

Sandpaper
Mild household detergent or weak solvent (such as alcohol)
File (installation in a metal hull)
Angle finder (installation with a fairing)
Band saw (installation with a fairing)
Rasp or power tool (installation with a fairing)
Marine sealant (suitable for below waterline)
Slip-joint pliers
Grommet(s) (some installations)
Cable ties
Water-based anti-fouling paint (mandatory in salt water)
Installation in a cored fiberglass hull: (see page 4)

Drill bits and hole saws for hull interior:

B45, SS505

35mm or 1-3/8"

B258, B271W, SS258

40mm, 41mm, or 1-5/8"

B260, B265LH/LM, SS260, SS270W

42mm or 1-5/8"

Cylinder, wax, tape, and casting epoxy

Most vessels have some deadrise angle at the mounting location. If 
the transducer is mounted directly to the hull, the sound beam will 
be tilted to the side at the same angle as the deadrise. A fairing is 
strongly recommended if the deadrise angle exceeds 10

°. Made of 

a high-impact polymer with an integrated cutting guide, an Airmar 
fairing is safer and easier to cut with a band saw and shape with 
hand tools than custom fairings.
• Orients the sound beam straight down by mounting the 

transducer parallel to the water surface.

• Mounts the transducer deeper in the water for clean flow over 

the transducer’s face.

• Airmar High-Performance Fairing has a long streamlined 

shape, directing water around the transducer to minimize drag. 
Performance is excellent above 15kn (18MPH). (To order see 
“Replacement Parts” on page 4.)

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

Part No.________________Date___________Frequency_________kHz

B45

Standard

High-Performance

Fairing

Fairing