My only qualification to respond here is from having owned and managed my spas for nearly 30 years.
FWIW, as much as I've hoped for leaks, drips, and tell tale calcium build ups to vanish, they seldom, if ever disappeared. All I've ever achieved from deferring the inevitable was to end up paying more for the replacement part years later and having spent all that time wondering if and when the offending unit/part would fail and necessitate an unplanned, emergency repair. And then when they did fail, I had to scramble around to get the parts, at any cost.
With that said, an 11 year old pump with a leak and obvious water marks is a sign that it's time to replace it and start enjoying your tub instead of chasing your tail and laying awake at night thinking of other options to employ.
My only issues with replacing pumps was weighing the price versus how much I could upsize before compromising the integrity of the pipes and fittings.
Move on to a new pump and enjoy the fruits of your labor.
