Hello,
I had removed the starter motor into pices, the cranking speed was very low and the battery runs out after 4 to 5 cranks, this is a 100 AMP cold cranking battery, the bottom of the armature is damaged: the wires from the armature's coil at the bottom are exposed and the coating had come off, the copper had got slightly brittle too where the coating had come off (note this is at the bottom not where the commutator is, you can see this if you look under the armature " at the bottom " ) I hope you know where I'm describing to you

my question is this: Would you recommend having the armature rewraped ?, the field coil is new. My guess is this happened because there was this stupid mechanic and he had been connecting up to four batteries together! to get the car started because there was a staring problem WTF?????? obviously it was some other problem I dono may be IP timing or some fuel block or some other issue and I'm sure if that was sorted it would have started, what they do is they keep cranking and cranking with so many batteries until it finally starts sometimes.
I was not alive when this had been happening and my father just told me when I had pulled the motor out and my father is not much of a mechanic, but then the IP timing had been set and set again by me and it starts ok and no smoke unlike earlier, belting grey smoke, the problem is the cranking now, all help is appreciated oh and the solenoid is good too