I replaced the console in my boat that had livewell with one that doesn't so now I have an aerator that can't be used. My thought was I might could re-plumb it and add a hose bib to convert it to a raw water wash down. Do they produce enough pressure and flow? It takes about 5 mins to fill the 16 gal livewell (just guessing I've never timed it) so 3-5 gpm and most wash downs have less flow. Could it work?

It won't be great, not enough pressure. But, you can use the same thru-hull, add a jabsco wash down pump, plumb it out and be golden.

Use to have one on my fan boat for bowfishing after the deck got slimmy hose it down and pump it out........

You could do above with a real wash down pump which has higher pressure with lower GPH. You could pick up a larger bait well pump, like a 1100 GPH or 750 GPH, they do not create the pressure of a wash down pump but would give a decent amount of flow if the hose was not too long

If I can't do it with the pump I have I'll just get the real deal. I thought maybe I might could make due for awhile with what I have, but I guess I'll get a wash down pump.