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OWNER' S GUIDE & INSTALLATION INSTRUCTIONS
Removable In-Hull Depth Transducer
Models: M256, M260
IMPORTANT:
Please
completely before proceeding with the installation.
These instructions supersede any other instructions in
your instrument manual if they differ.
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.
Applications
• Recommended for high speed boats
• Fiberglass hulls only
• Accommodates a deadrise angle up to 30°
Tools and Materials
Allen wrench:
3/16"
Rope
Detergent or weak solvent (such as alcohol)
Safety goggles (some installations)
Dust mask (some installations)
Disk sander (some installations)
Thin sealable plastic bag (optional)
Twist-tie
Water-based lubricant (such as K-Y
Carpenter's level
Pencil
Saw
Scissors
Adhesive (such as Boatlife
®
or fiberglass resin
Mineral oil (available at pharmacies)
Wrench
Assembling the Transducer
1. Thread the cable through the cable hole in the gasket and the
cable hole in the plate (see Figure 1).
2. Rest the gasket and plate on the transducer and align the
mounting holes. Fasten the three 1/4-20 x 1/2" screws and split
lock washers in place. Tighten with a 3/16" allen wrench.
3. Insert the two fill/vent plugs.
4. Thread the cable under the handle as seen in the drawing
above.
read
these
instructions
®
jelly) (optional)
Lifeseal
®
or 3M
™
#4200)
M260
Record the information found on the cable tag for future reference.
Part No._________________Date___________Frequency________kHz
Mounting Location
Fiberglass Hull
Since the hull absorbs acoustic energy, transmitting through the
hull reduces the transducer's performance. Fiberglass hulls are
often cored in places for added strength or to reduce weight.
These cored areas contain balsa wood or structural foam which
are poor sound conductors. Do not locate the transducer over
coring.
Caution : Find an area of the boat where the fiberglass is solid (no
air bubbles are trapped in the fiberglass resin) and where no
coring, flotation material, or dead air space is sandwiched
between the inside skin and outer skin of the hull.
Figure 1. Assembling the transducer
fill/vent plug (2)
screw (3)
1/4-20 x 1/2"
split lock washer (3)
plate
gasket
cable
transducer
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Related Manuals for Airmar M256
Summary of Contents for Airmar M256
- Page 1 OWNER’ S GUIDE & INSTALLATION INSTRUCTIONS Removable In-Hull Depth Transducer Models: M256, M260 IMPORTANT: Please read these instructions completely before proceeding with the installation. These instructions supersede any other instructions in your instrument manual if they differ. M260 CAUTION: NEVER USE SOLVENTS Cleaners, fuel, paint, sealants, and other products may Record the information found on the cable tag for future reference.
- Page 2 Test the Selected Mounting Location pressure waves Establishing a Performance Baseline The results of this test are used as a basis of comparison to determine the best in-hull location for the transducer. 1/3 aft 1. Take the boat to the maximum depth in which you will be 150-300mm (Load Waterline Length) operating the echosounder.
- Page 3 Caution : Do not mark or cut the shortest side of the tank. Warning : Always wear safety goggles and a dust mask. 2. M256— With a carpenter’s level held against an angled side of the tank, draw a level line even with the point of the “V”. Repeat 1.
- Page 4 The information needed to cable jacket when passing it through the bulkhead(s) and other order a replacement Airmar transducer is printed on the cable tag. parts of the boat. To reduce electrical interference, separate the Do not remove this tag. When ordering, specify the part number, transducer cable from other electrical wiring and the engine(s).
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