Installing an External Transducer

Your trolling motor may come with a Mega Side and Down Imaging (MSI), Mega Down Imaging (MDI), Dual Spectrum CHIRP (DSC), or a Universal Sonar 2 (US2) transducer built into the lower unit. The built-in transducer may interfere with mounting an external transducer, depending on the size of the external transducer. Also, having 2 transducers that close to each other, may cause interference.
*Note: When installing an external transducer on an Ulterra, Riptide Ulterra or Riptide Instinct QUEST, you need to be careful that the transducer cable does not get pinched when the motor is stowed and deployed.
Click here for the Transducer Mounting Kit MKR-15, fits transducers of all major manufacturers and fits Minn Kota lower unit motor sizes: 3-1/4", 3-5/8", 4", and 4-1/2".

Jump to:

• Mounting the External Transducer on Non-Auto Stow/Deploy Motor
• Mounting the External Transducer on an Auto Stow/Deploy Motor
• Mounting the External Transducer on a Legacy Terrova with Lift Assist
• Mounting the External Transducer on an Ultrex
• Mounting the External Transducer on a Cable-Steer Motor

Mounting an External Transducer on a Non-Auto Stow/Deploy Motor

1. Mount the External Transducer according to directions provided with the transducer.
2. Leave enough slack in the Transducer Cable between the Lower Unit and Control Head to allow the motor to properly stow and deploy.
3. Use two tie wrap cables to secure the Transducer Cable to the Shaft just below the Control Head and just above the Lower Unit.
4. Run the Transducer Cable through the Coil Cord to the power supply.
   

Mounting an External Transducer on an Auto Stow/Deploy Motor

1. Mount the External Transducer according to directions provided with the transducer.
2. Leave enough slack in the Transducer Cable between the Lower Unit and Control Head to allow the motor to properly stow and deploy.
3. Use two tie wrap cables to secure the Transducer Cable to the Shaft just above the Lower Unit and just below the Control Head.
4. Run the Transducer Cable through the Coil Cord to the power supply.
   

Mounting an External Transducer on a Legacy Terrova with Lift Assist

1. Mount the External Transducer according to the directions provided with the transducer.
2. Leave enough slack in the Transducer Cable between the Lower Unit and the Control Head to allow the motor to properly stow and deploy.
3. Use 2 tie wrap cables to secure the Transducer Cable just above the Lift Assist Collar on the Lower Unit and just below the Control Head.

4. Run the Transducer Cable through the Coil Cord to the Fishfinder and/or power supply.
   

    

Mounting an External Transducer on an Ultrex

1. Mount the External Transducer according to directions provided with the transducer.
2. Leave enough slack in the Transducer Cable between the Lower Unit and Control Head to allow the motor to properly stow and deploy.
3. Use two tie wrap cables to secure the Transducer Cable to the Shaft just above the Lower Unit and just below the Control Head.
4. Run the Transducer Cable through the Coil Cord to the power supply.
   

Mounting an External Transducer on a Cable-Steer Motor

1.  
   1. Mount the external transducer according to directions provided with the transducer.
   2. Leave enough slack in the transducer cable between the Lower Unit and Control Head to allow the motor to properly stow and deploy.
   3. Use two Tie Wrap Cables to secure the transducer cable to the Shaft just above the Lower Unit and just below the Control Head.
   4. Run the transducer cable along the Pedal Control Sleeve Assembly toward the Foot Pedal.
      

Riptide Saltwater Lower Unit Dimensions

4.5" Diameter Riptide QUEST 90/115 Lower Unit Dimensions

Models Included:

• Riptide Instinct QUEST
• Riptide Terrova QUEST

4.5" Diameter 112 LB, 101LB Thrust Brushed 

Motor Models Included:

• EO 1 HP
• Fortrex non Built-In Transducer All Year and Shaft Lengths
• Riptide Fortrex All Years and Shaft Lengths
• Riptide Terrova BT 2023-Present Shaft Sizes (87") 
• Riptide ST 2007-2016 All Year and Shaft Lengths
• Riptide Transom All Years and Shaft Lengths
• Terrova Non-Bluetooth, Non-Built-In transducer 2007-2016 all shaft lengths

4.5" Diameter 112 LB, 101LB Thrust Brushed 

Motor Model Included:

• Riptide Ulterra BT 2017-2023 (45", 60", and 72"
• Riptide Ulterra Non-BT 2015-2016 (45", 60", and 72")
• Riptide Terrova BT 2017-2023 (54",60", and 72")

4" Diameter 80 Thrust Brushed Lower Unit Dimensions

• Riptide Terrova BT 2017-2023 All Shaft Lengths
• Riptide Ulterra BT 2017-2023 All Shaft Lengths
• Riptide Ulterra Non Bluetooth 2015-2016

3 5/8" Diameter 70 LB and 55Lb Thrust Lower Unit Dimensions

3 1/4 Demeter 45 LB and 30 Lb Thrust Lower Unit Dimensions

Freshwater Lower Unit Dimensions

4.5" 112 LB Thrust Dual Spectrum CHIRP (DSC) or Universal Sonar 2 (US2)

Includes:

Ulterra 112 BT 2017-2023

Terrova 112 BT 2017-2023

Ulterra Non-Bluetooth 2015-2016

4" 80 LB Thrust Dual Spectrum CHIRP (DSC) or Universal Sonar 2 (US2)

3 5/8" 70 LB and 55 LB Thrust Dual Spectrum CHIRP (DSC) or Universal Sonar 2 (US2)

3 1/4"  45 LB, 40 LB, and 30 LB Thrust Lower Unit Dimensions

QUEST Motors with Built in MEGA Imaging MDI, MSI, or Dual Spectrum CHIRP (DSC)

• Note: Due to the size of QUEST lower units with Built-In transducers it is not recommended to attempt to mount an external transducers to these motors. 

QUEST MEGA Down and MEGA Side Imaging Lower Unit Dimensions

Dual Spectrum CHIRP (DSC) Lower Unit Dimensions