Airmar P39 Owner's Manual & Installation Instructions

OWNER' S GUIDE
Transom-Mount with Release Bracket
Transducer or TRIDUCER
U. S. Patents: 5,606,253
WARNING: Always wear safety goggles and a dust
mask when installing to prevent personal injury.
WARNING: When the boat is placed in the water,
immediately check for leaks around the screws and
any other holes drilled in the hull.
CAUTION: Never pull, carry, or hold the transducer
by the cable as this may sever internal connections.
CAUTION: Never strike the transducer with anything
except the palm of the hand. Never strike the
paddlewheel.
CAUTION: Never use solvents. Cleaners, fuel, paint,
sealants, 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

• Not recommended for boats with large inboard engine(s).
• Good operation up to 44kn (50MPH)
• Vertically orients sound beam on hull with deadrise angle up to 30°
• Adjusts to transom angles from 2
• Bracket protects transducer from frontal impact only
Tools & Materials
Safety goggles
Dust mask
Pencil
Electric drill
Drill bits:
Bracket holes
Transom hole (optional) 18mm, 11/16", or 3/4"
Cable clamp holes
Masking tape
Angle finder
Grommets (some installations)
Marine sealant (suitable for below waterline)
Screwdrivers
Straight edge
Cable ties
Water-based anti-fouling paint (mandatory in salt water)
Multisensor
®
Model P39
° °
–22
4mm, #23, or 9/64"
3mm or 1/8"
& Installation INSTRUCTIONS
Record the information found on the cable tag for future reference.
Part No._________________Date___________Frequency________kHz

Mounting Location

CAUTION: Do not mount in an area of turbulence or bubbles:
near water intake or discharge openings; or 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 the best performance, the transducer must be in contact
with smooth water. To identify an area of "clean" water, observe
the water flow off the transom while the boat is underway.
• Allow headroom space above the bracket for it to release and
rotate the transducer upward (see Figure 1).
• Mounting on the starboard side of the hull where the propeller
blades are moving downward is preferred.
• Mount the transducer as close to the centerline (keel) of the
boat as possible to ensure the transducer remains in the water
when the boat is turning.
- Single drive boat—Mount at least 75mm (3") beyond the
swing radius of the propeller (see Figure 2).
- Twin drive boat—Mount the transducer between the drives.
Headroom
NO speed sensor
109mm (4-5/16")
Headroom with
speed sensor
130mm (5-1/8")
Figure 1. Stepped transom
headroom required
Copyright © 2003 Airmar Technology Corp.
P39
TRIDUCER ®
multisensor
NOTE: Starboard
side of hull where
propeller blades are
moving downward is
preferred.
headroom
Figure 2. Mounting location
on single drive boat
Copyright © 2003 - 2011 Airmar Technology Corp.
75 mm (3")
minimum
beyond
swing radius