Has there been any effort to determine if the engine itself turns freely? If not, we're arranging deck chairs on the Titanic for the best view of the iceberg! Even a freshly rebuilt starter in 100% condition isn't going to help until the engine is able to turn. Getting less than one turn of the crankshaft even with 12 volts applied doesn't sound too promising. Two pages of good advice isn't going to substitute for a couple of hours of hands-on work!
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!