Troubleshoot

1. Check probe power. Look for flashing LED in water. Inspect AA batteries and battery pack. Check polarity of four AA batteries. Battery pack connector must be adhered inside.

2. GAIN set too low.Increase GAIN on display. Default is 15. Press SET button and arrows to adjust. Increase GAIN for above normal cable blow back or deep water.

3. Probe not sending data.LED may still blink. To confirm try a different probe, or your probe on another boat. Probe can’t be repaired and must be replaced. Request Service

4. Transducer position.Check transducer for movement in mount. Should be parallel with surface at the bottom of the hull. Inspect cable for damage. New installations refer to placement guide.

5. Probe not in water.Test probe 5-feet below transducer while boat is docked or at rest in water. Don’t test inside bucket of water.

6. Probe upside down. Attach to downrigger cable so paddle wheel is down.

Temperature sensor failure. Sensor is damaged or malfunctioning. Sensor can’t be repaired and the probe must be replaced. Request Service.

1. Sonar interference. Turn fish finder off to verify. Set fish finder to 200 kHz rather than 50 kHz or 83 kHz.

2. Probe opposite transducer. Run probe and transducer on same side of boat.

3. GAIN set too low. Increase GAIN on display. Default is 15. Press SET button and arrows to adjust. Increase GAIN for above normal cable blow back or deep water.

4. Turbulent water. Caused by rough waves or improper transducer placement on transom. New transducer installations refer to placement guide.

1. Cracks in probe body. Result of not loosening the probe cap to relieve pressure caused by battery corrosion. Non-warranty and can’t be repaired, probe must be replaced.

2. Cracked cap. Result of overtightening or not loosening after fishing day. Replacement caps available purchase here.

3. Water in battery compartment. Inspect probe body and cap for cracks. Check condition of O-rings on probe and in cap. Clean or replace battery pack as needed.

Display values over adjusted. Return to factory default settings and compare to probe 5-feet underwater when trolling. Small variation is normal. Probe speed is mechanical and 100% repeatable.

Transducer location affects mechanical paddle wheel. Fish Hawk surface speed shows faster when trolling. Can be calibrated, but most anglers rely on GPS for surface speed. Fish Hawk not accurate above 10 MPH.

1. In-line fuse blown. Check 1-amp fuse near end of power cord.

2. No button response. Replace membrane switch. Request Service.

3. Backlight flashes. Replace membrane switch. Request Service.

4. GAIN scrolls without pressing arrow. Replace membrane switch. Request Service.

Electrical interference from 1990 - 2002 Mercury motor. Turn motor off to verify. Replace spark plugs with suppressor spark plugs Spark Plug Chart.

In BY DEPTH mode . Change mode to BY TEMP for 5-foot intervals instructions. Instructions.