Section 3. 12 Volt Starter Trouble Shooting Chart - Tecumseh HH100 Handbook

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