This is where I installed my raw water and washdown/livewell thru hulls ( aft is washdown ).
The ParMax 4 pump installed later is mounted to the transom and easily accessable. The quick-attach hose attachment is mounted on the 'aft wall', further from the stern cleat then someone else's picture to avoid any tangles with coiled hose I use. I also mounted an exterior, water-proof on/off switch for the washdown power.
A few years later, I added a Shurflo 800 livewell pump directly to the thru hull livewell valve and that also feeds raw water to the ParMax4 washdown. All works great ! The power to that is run to the helm.
Also, I like where my blower is - see top left in pix. It's out of the way.
Note: I converted my Tsunmai from a twin I/O to a single, so I purposely left extra room when I closed up the floor.
I smiled when I saw your pix 'cause I been there done that
. Just remember the beer !
