What a good idea! The Ericson Safety pump clamps onto your propeller shaft, inside your boat and pumps all the time the shaft is turning.
Being made of aluminum it can run dry continuously, unlike most other pumps, while also extracting engine fumes.
If you start taking in water, then it automatically pumps it out, so long as the engine is running and in gear.
The pump is easy to fit to shafts ranging from 1″ up to 61/4″ in diameter.

The model for most sailing yachts is the 2-05 which fits shaft sizes from 1″ to 2″.
The pump is maintenance-free, needing no lubrication or spare impellers.