As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT TRIED TO START ENGINE (MAX RPM 13% N1) AND TOT CLIMBED MUCH HIGHER THAN NORMAL. ABORTED START AND TRIED TO START ENGINE AGAIN, ENGINE WOULD NOT SPIN. SHUT #1 ENGINE DOWN. ENGAGED #2 STARTER AGAIN AND ONLY LOUD ARCING NOISE HEARD. REPLACED STARTER GENERATOR AND RETURNED AIRCRAFT TO SERVICE.