Starter motor not working
Possible causes: Insufficient battery power, poor circuit contact, malfunctioning electromagnetic switch, internal motor damage, etc.
Troubleshooting: Check battery voltage, circuit connections, electromagnetic switch coil resistance, and disassemble the motor if necessary.
Starter motor weak
Possible causes: Insufficient battery power, armature or field winding short circuit, commutator wear, seized bearings, etc.
Solutions: Replace the battery, repair or replace motor components.
Starter motor spinning freely
Possible causes: Drive gear and flywheel ring gear not engaged, one-way clutch slipping, etc.
Solutions: Check the drive mechanism, adjust or replace the one-way clutch.
Starter motor making unusual noise
Possible causes: Gear wear, bearing damage, electromagnetic switch malfunction, etc.
Solutions: Replace worn parts, repair the electromagnetic switch.