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TROLLING MOTOR INSTALLATION AND OPERATION
The trolling motor is equipped with a MotorGuide HD+ universal sonar plug.
Adapters are available to connect other brands of sonar displays to the trolling
motor. Match the cable connector to the sonar port on the back of the sonar
display. Some sonar multi‑functional displays may require additional cables
provided by the sonar manufacturer. Power up the unit to ensure that the sonar
cable is connected securely.
Transducer adapter cables available from MotorGuide
Lowrance® 9‑Pin HD+ Sonar Adapter Cable
Lowrance® 7‑Pin HD+ Sonar Adapter Cable
Humminbird® 11‑Pin HD+ Sonar Adapter Cable
Humminbird® 7‑Pin HD+ Sonar Adapter Cable
Garmin® 8‑Pin HD+ Sonar Adapter Cable
Raymarine® HD+ Element Sonar Adapter Cable
Raymarine® HD+ Axiom Sonar Adapter Cable
MotorGuide 15' HD+ "Universal Sonar Extension Cable
Reducing Sonar Transducer Interference
Sonar transducers can be affected by interference, such as radio frequency
interference (RFI) and electromagnetic interference (EMI). This interference
can cause undesired operation of the sonar display. Refer to the following list to
reduce sonar interference sources.
1. Lower the sonar sensitivity, also known as gain. Refer to the documents
included with your sonar display.
a. Change the sensitivity to an automatic setting.
b. If the automatic setting does not reduce sonar interference, manually
change the sensitivity to 55–65% of the maximum setting.
2. Verify that the transducer cable is not routed near any power cables.
3. Ensure that the positive (+) and negative (–) power cables are installed
next to each other. This helps cancel any EMI.
4. Inspect the transducer cable for damage, nicks, or cuts. Replace the
transducer cable if it is damaged.
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70141
Harness—to nose cone sonar
27
Part Number
8M4004174
8M4004175
8M4004176
8M4004177
8M4004178
8M4004179
8M4004180
8M4004245
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