25
SECTION 3
12 VOLT STARTER TROUBLE SHOOTING CHART
PROBLEM PROBABLE CAUSE FIX
Does not function Weak or dead battery Check charge and/or replace battery.
Corroded battery terminals Clean terminals and/or connections.
and/or electrical connections
Brushes sticking Free brushes. Replace worn brushes and
those that have come in contact with grease
and oil.
Dirty or oily commutator Clean and dress commutator.
Armature binding or bent Free armature and adjust end play or replace
starter.
Open or shorted armature Replace starter.
Shorted, open or grounded Replace starter.
field coil
Loose or faulty electrical Correct.
connections
Load on engine Disengage all drive apparatus and relieve all
belt and chain tension.
Electric starter cranks but no Disconnect ignition cutoff wire at the engine.
spark at spark plug. Crank engine. If spark at spark plug ignition
switch, interlock switch and safety switch is
inoperative. If no spark, check magneto. Check
wires for poor connection cuts or breaks.
Electric starter does not crank Remove wire from starter. Use a jumper battery
engine and cables and attach directly to starter. If
starter cranks engine the starter is okay; check
solenoid, starter switches, safety switches and
interlock switches. Check wires for poor
connections, cuts or breaks.
Low RPM Unit controls engaged Insure all unit controls are in neutral or
disengaged.
Worn bearings in cap assemblies Clean bearings or replace cap assemblies.
Bent armature Replace starter.
Binding armature Free up armature. Adjust armature end play.
Brushes not seated properly Correct.
Weak or annealed brush springs Replace springs.
Incorrect engine oil weight Insure the correct weight of oil is being used.
Dirty armature commutator Clean commutator.
Shorted or open armature Replace starter.
Loose or faulty electrical Correct.
connections in motor
Motor stalls under load Shorted or open armature Replace starter.
Shorted field coil Replace starter.
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