A pre-engaged starter motor- paul-ryan.info Note the leadconnections Solenoid Activating lever Shaft Pinion Field coil Armature Commutator Brushes
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A pre-engaged type of starter motor incorporates a solenoid. When the started switch is turned on, the solenoid activates a lever which first moves the pinion along the shaft to engage with the flywheel ring gear and only then operates the switch that starts the motor turning.

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Checking and replacing the starter motor

If testing the starter circuit (See Checking the starter circuit) indicates a fault in the starte...