Manual bilge pump maintenance schedule

Jabsco 6590
5 screw cover
2 1/2" deep impeller
Emergency manual engaged bilge pump

I used to flood the ER bilge a little and engage the pump to let it do at least something than just sit.
Stopped that over 15 years ago when I started a bone dry bilge (pipe) dream.

Then I serviced the pump with new bearings, seal, impeller & belt. Packed it with many packs of pump pre-lube*.

Then it sat for few years.

Engaged the pump for a few seconds and then replaced the unused (some set) impeller a few years later and packed it with a bunch of pump pre-lube.

Then it sat for a few more years.

Engaged the pump for a few seconds and then replaced the unused (some set) impeller a few years ago and packed it with a bunch of pump pre-lube again. Maybe a new belt went on.

So, Now I'm crawling around the engine room fixing oil leaks (Detroits) and checking things.
Belt still looks great.
Do I mess with the un-used crashed pump??


*(Those lil packs of water soluble pre-lube that comes with most impeller kits but is never used, but kept any way).