Try moving the ground cable to one of the bolts that holds the starter to the engine. I have seen "rebuilt" starter parts that were painted so well that the circuit couldn't complete itself between the brush holders and the housing. The mating parts of the starter need to be unpainted during assembly. THEN make them pretty with several coats of paint.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!