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Thru-Hull Mount: 

Retractable with Valve

TRIDUCER

®

 Multisensor

Models: 

DST800, DST810

Patent http://www.airmar.com/patent.html

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

Part No._________________Date___________Frequency________kHz

CAST

 App

 for DST810

Download the Airmar CAST App to evaluate your 
boat’s performance by viewing and analyzing 
DST810 sensor data. With the CAST App you can 
perform depth, speed, temperature, and attitude 
calibrations.
Install the CAST App on your iOS or Android device with 
Bluetooth

®

 connectivity. Then view available NMEA data over a 

wireless or network connection. Within the Cast App, you can link 
to and download the CAST App User Guide.

Downloading the CAST App

1. Go to the App Store or Google Play Store.
2. Search on the word Airmar.
3. Download the free CAST App

Important

Read the instructions completely before proceeding with the 
installation. These instructions supersede any other instructions in 
your instrument manual if they differ.

Applications

• Best performance on hull deadrise angle through 7°. 

Accommodates up to a 22° deadrise angle.

Plastic

 housing recommended for fiberglass or metal hull only. 

Never install a plastic housing in a wood hull, since swelling of 

the wood can possibly fracture the plastic

.

Bronze

 housing recommended for fiberglass or wood hull.

Never mount a bronze housing in a metal hull because 

electrolytic corrosion will occur.

Stainless steel

 housing compatible with all hull materials.

Recommended for a metal hull to prevent electrolytic corrosion 

provided the stainless steel housing is isolated from the metal 

hull.

Pretest

Connect the sensor to the instrument and spin the paddlewheel. 
Check for a speed reading and the approximate air temperature. If 
there are no readings or they are inaccurate, check all the 
connections and repeat the test. If there are still no readings or 
they are inaccurate, return the product to the place of purchase.

plastic

low-profile
P617V housing

Follow the precautions below for optimal 

product performance and to reduce the risk of 

property damage, personal injury, and/or death.

WARNING

: Always wear safety glasses, a dust mask, and 

ear protection when installing.

WARNING

The valve is not a watertight seal!

 Always 

install the insert or blanking plug. Be sure it is fully inserted 

into the housing and the cap nut is screwed on completely 

for a watertight seal.

WARNING

: All the O-rings must be intact and well lubricated 

to make a watertight seal. Do not dry fit the insert in the 

housing. Attempting to install the insert without lubricating all 

O-rings will damage them, possibly preventing full insertion 

and a watertight seal.

WARNING

: The 

YELLOW

 O-ring must be in place near the 

top of the insert to make a watertight seal.

WARNING

: To retrofit the insert in a housing 

without

 a 

valve, the insert must have a 

BLACK

 O-ring near the top to 

make a watertight seal.

WARNING

:

 

Always attach the safety wire to prevent the insert 

or blanking plug from backing out in the unlikely event that the 

cap nut fails or is screwed on incorrectly.

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.

WARNING

Stainless steel housing in a metal hull

—Be 

sure the washer contacts the hull. Do not tighten the hull nut 

with the washer against the isolation bushing, as the 

housing will not be firmly installed.

CAUTION

: Never pull, carry, or hold the sensor by its cable. 

This may sever internal connections.

CAUTION

: The arrow on the top of the insert must point 

forward toward the bow to align with the water flow.

CAUTION

Plastic housing

—Never use a fairing with a 

plastic housing; the protruding sensor would be vulnerable 

to damage from impact.

CAUTION

Metal housing

—Never install a metal housing in 

a vessel with a positive ground system.

CAUTION

Stainless steel housing in a metal hull

—A 

stainless steel housing must be isolated from a metal hull to 

prevent electrolytic corrosion. Use the isolation bushing 

supplied.

CAUTION

: Never use solvents. Cleaner, fuel, sealant, paint, 

and other products may contain solvents that can damage 

plastic parts, especially the transducer’s face.

CAUTION

: Never power sand or pressure wash the sensor. 

It may weaken the structure or damage the internal 

components.

Smart

™ 

Sensor

Dust and water ingress rating: IP68

OWNER’S GUIDE      &       INSTALLATION INSTRUCTIONS

Summary of Contents for DST810

Page 1: ...and or death WARNING Always wear safety glasses a dust mask and ear protection when installing WARNING The valve is not a watertight seal Always install the insert or blanking plug Be sure it is fully inserted into the housing and the cap nut is screwed on completely for a watertight seal WARNING All the O rings must be intact and well lubricated to make a watertight seal Do not dry fit the insert...

Page 2: ...ructed by the keel or propeller shaft s Choose a location away from interference caused by power and radiation sources such as the propeller s and shaft s other machinery other echosounders and other cables The lower the noise level the higher the echosounder gain setting that can be used Choose a location with a minimum deadrise angle so the transducer beam will be aimed at the bottom Choose an a...

Page 3: ...de of the hull to ensure smooth water flow under the sensor 5 All the O rings must be intact and well lubricated to make a watertight seal After the marine sealant cures inspect the O rings on the insert replace if necessary and lubricate them with the silicone lubricant supplied Figure 5 Be sure the YELLOW O ring is in place near the top Also lubricate the bore of the housing above the valve 6 Th...

Page 4: ...er of fiberglass cloth with a suitable resin and lay it inside the hole to seal and strengthen the core Add layers until the hole is the correct diameter Alternatively a hollow or solid cylinder of the correct diameter can be coated with wax and taped in place Fill the gap between the cylinder and hull with casting epoxy After the epoxy has set remove the cylinder 6 Sand and clean the area around ...

Page 5: ...ush with the outside wall of the insert 4 All the O rings must be intact and well lubricated to make a watertight seal Install the yellow O ring near the top of the insert Install a small O ring near the paddlewheel 5 Being sure the O rings are intact and well lubricated to make a watertight seal place the remaining two small O rings near the bottom of the blanking plug Replacement Sensor Parts Th...

Page 6: ...6 Copyright 2005 2021 Airmar Technology Corporation 35 Meadowbrook Drive Milford New Hampshire 03055 4613 USA www airmar com ...

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