My pet peeve are the guys that do a water pump job and totally ignore the carbon seal at the top of the drive shaft. If it is not in good condition, water can enter the crankcase and over a period of time cause wear and damage to the bearings. Then it tosses a rod through the case and somebody blames it on the oil. At the very least, always replace the 303355 gasket and 303347 o -ring.
Also,, it seems like broken shock absorbers in the lower unit seem to be showing up all over the place. My personal theory is that the heavy spring inside is breaking due to metal fatigue after being under stress for some 60 years.
