I designed this a couple years ago I think and it's just been a dandy little pump for light cruisers and destroyers. A 380 motor fits perfectly atop (I E6000 the motor on instead of bolts) and the impeller press fits on the shaft.
Hope you all can make use of it. It kept my Tromp afloat with heavy side mount damage at 2022 nationals until a Yamato propwashed her.
Recommended motor for 12v users: https://www.ebay.com/itm/1433189756...0Gf2c6VQ5W&var=&widget_ver=artemis&media=COPY