California Dreamin wrote:It could be one of many things....poor feed wire/spade terminal on the solenoid, the wire often internally corrodes.
Bad earth/pos lead wires....earth on the gearbox nose is prone.
or perhaps the copper braided wire that goes between the solenoid and starter body has corroded to dust (VERY COMMON)
Maybe a burnt out section on the armature or worn out brushes.
Solenoid contacts
Martin
X2

mine was the wire to the solenoid..fu barred.
same symptoms