Since this started after the annual inspection, and checking/setting the magneto timing is done at annual, I would start looking there… you didn’t specify which model/year P32R you have. Some models are equipped with a bendix single drive dual magneto. (Mine is) When timing this mag, there’s no way other than removing the mag and adjusting the internal mag timing to get left and right to fire at exactly the same time, like you would in a dual magneto setup. So if the internal timing is split, the mechanic has to set it to the first set of points to open at 20 degrees btdc. The second breaker has to open within 3 degrees of the first. (Piper Lance Service Manual 8-30 i-m). If the mechanic used any other technique, it could cause the hard start issues you’re having. If the split is more than 3 degrees, the magneto has to be internally timed. Good luck! …and yes, I’m an A&P, and retired I.A.
