Owner Service Assistance; Troubleshooting - Mercury Freshwater Manual

OWNER SERVICE ASSISTANCE

Troubleshooting

NOTE: For service information, contact any certified MotorGuide
service center. For a full listing of MotorGuide service centers, go to
www.motorguide.com or contact any Mercury Marine service office.
Symptom
Loss of power
Excessive noise,
vibration
Possible Cause
Weak 12 volt trolling
motor battery
Loose or corroded
battery connections
Propeller is loose,
damaged, or off‑balance
Wiring or electrical
connection faulty
Magnets cracked or
chipped
Water intrusion in the
lower unit
Motor shaft is bent
Propeller is loose,
damaged, or off‑balance
Damaged bearings or
bushings
Magnets interfering with
armature
Magnets cracked or
chipped
34
Resolution
Check 12 volt battery charge.
Recharge or replace battery as
required.
Inspect battery connections for
cleanliness and tightness.
Refer to Removing the
Propeller.
Wire gauge from the battery to
the trolling motor is insufficient.
6 gauge wire is recommended.
The motor will whine or grind.
Contact service center.
Contact service center.
Contact service center.
Refer to Removing the
Propeller.
Contact service center.
Turn off the power and
manually rotate the propeller.
If the propeller does not rotate
freely with a slight magnetic
drag, contact service center.
The motor will whine or grind.
Contact service center.
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