What are the reasons for a weak starter?

[VonKiara]

The reasons for a weak starter: Insufficient charging of the battery, excessive resistance caused by poor wiring or connections, resulting in reduced current and slow rotation of the starter. Diagnostic methods for a weak starter: 1. Internal short circuits in the armature coil or field coil of the starter can also cause the starter to be weak; 2. Mechanical faults inside the starter can also affect the normal operation of the starter; 3. Under low-temperature conditions, the internal resistance of the battery increases, the terminal voltage decreases, and the engine friction resistance increases, which can also lead to symptoms of a weak and slow starter; 4. You can use a conductor to bridge the two terminals on the starter switch. If the starter speed increases significantly, it indicates poor contact of the starter switch contacts and increased resistance; if the starter speed does not change, you should check whether the battery is fully charged, whether the brush wear is excessive, and whether the brush spring is too weak.