What was found
DURING PRELIMINARY RUNUP AT ANNUAL INSP, TECH NOTED ENGINE DIFFICULT TO START, & ROUGH ON LT MAG WHEN COLD. ATTEMPTS TO CHECK TIMING ON LT MAG WITH A MAG SYNCHRONIZER UNSUCCESSFUL. POINTS WERE ERRATIC DURING CLOSING & OPENING. REMOVAL OF CAP DISCLOSED SIGNIFICANT DEBRIS. DISASSEMBLY OF MAG DISCLOSED ROTOR GEAR HAD CONTACTED THE DISTRIBUTOR BLOCK, GRINDING ROTOR GEAR & DISTRIBUTOR GEAR / BLOCK. ROTOR GEAR HAD ALSO WORN A .0625 DEEP GROOVE IN THE CONDENSER. IT APPEARED THE CONTACT BETWEEN THE ROTOR GEAR & CONDENSER WAS ONLY THING PREVENTING ROTOR GEAR FROM DISENGAGING ROTOR SHAFT, & TOTALLY FAILING MAG. THERE WAS EVIDENCE THE ROTOR GEAR HAD NEVER BEEN FULLY SEATED ON THE ROTOR SHAFT.