As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE HAS BEEN HARD TO START FROM DATE OF INSTALL. DURING 500 HR MAGNETO INSPECTION BOTH DISTRIBUTOR GEARS WERE MISSING BRUSHES (CONTACTS) & SPRINGS. HAVE GONE THROUGH TROUBLESHOOTING BECAUSE OF THE STARTING ISSUE. IT IS OUR CONCLUSION THAT THE BRUSHES WERE NEVER INSTALLED DURING OVERHAUL OF MAGNETO.