Always visually inspect the motor mounts before removing them from the end plates. an inspection in-place may give some indication to the cause of an operational problem or failure. The motor mount in the photograph displays the effects of over-oiling. though B&G motor mounts are made of neoprene, an oil resistant compound, constant oil soaking will eventually product material damage. this mount has been damages and has begun to sag as a result. Always replace both motor mounts when either one shows signs of sagging. never replace one mount at a time. single replacements will only result in misalignment of pump and motor shafts.