Starter motor questions - rebuild

[Jezza_hr]

allencr Wrote:Just put 12V to the other terminal(M in the diagram, that large terminal that goes into the starter motor) to see if it'll run. It also energizes the holding coil but it won't be strong enough to move the gear.

That's what I tried. As you say, it slides the gear out but it doesn't engage the motor. I'm guessing the connector ( B ) usually provides a stronger connection to the motor to turn it when it's not worn.

I did pull apart the motor again last night and the brushes appear to be fine. They all sit firmly with little to no wearing down. So, that galvanised connector (no matter how minor it looks) must be the culprit.