Posted by Steve@Advance on April 07, 2020 at 07:57:22 from (24.182.105.128):
In Reply to: AC Delco Ramey Starter posted by Farmer Broome on April 07, 2020 at 06:19:29:
Not real common but it happens.
When the solenoid pulls the plunger in, it pushes the button inside the solenoid, closing the contacts to power the motor.
There is a spiral on the motor shaft that helps push the drive into the flywheel. That spiral in turn pushes back on the plunger. If the geometry is off, the plunger pushes too far back and the force of the motor on the spiral splines holds the plunger too deep into the solenoid, holding the button in, causing the motor to continue to run even with the signal removed.
It is caused by the wrong plunger, the fork bent or sometimes in backward, wrong drive gear, the thrust washer at the end of the drive missing, or the housing worn away letting the drive move too far forward.
I would take it back to the rebuilder. They will have heard of this before, should know what to do.
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