AC WD45 starter problem

Take the starter apart and clean in between the pole segments on the communitator. They get bridged with brush carbon and copper thus shorting out and never let the starter reach rpm or will stop the amature altogether. I use a sharp pointed stratch awl to clean them.

Next debur the pinon gear teeth tips as that stops the pinon from engauging the flywheel. As long as the pinon teeth are engauging about 1/2" then the worn gear tips won't be a problem. You'll be able too see past depth engaugement patteren on the pinon gear. Some starters have a adjustment for pinon tooth engaugement via a stop collar.

You might as well buy new brushs and bearings and then it'll be completly rebuilt.

When the 6v solenoid goes bad, reorder a 12v solenoid.

T_Bone