As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED BURNED PLASTIC ODOR FROM ENGINE COMPARTMENT. MECHANIC INSPECTED ENGINE COMPARTMENT AND FOUND A BURNED AREA ON THE STARTER/GENERATOR CONNECTOR PLUG BACKSHELL. REPLACED THE STARTER AND THE HARNESS FROM THE STARTER/GENERATOR TO THE ENGINE DECK. GROUND RAN ACFT AND CHECKED ELECTRICAL SYSTEM. NO FURTHER DISCREPANCIES NOTED. ACFT RETURNED TO SERVICE.