As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ENGINE WAS PUT TOGETHER WITH THE WRONG CAMSHAFT GEAR. THE ENGINE WOULD RUN BUT THE MAGNETO DROP WAS HIGH. ALSO IF YOU EXERCISED THE PROP AT ABOUT 1700 RPM THE ENGINE WOULD STALL OUT. THROTTLE RESPONSE AT LOWER RPMS WAS SLUGGISH AND WOULD MAKE THE ENGINE SPIT AND SPUTTER. HIGHER RPMS SEEMED NO PROBLEM.