Fuel leak down after aitting

Sorry if this is a duplicate, but nothing I've seen so far has my mind at ease. This is probably simple for some of you-
Equipment - I have a mid 90s 351, carbureted. Runs like a champ. Fish Nautique, mechanical fuel pump. Not original to the boat. Engine is GT40 but converted to carb.
Problem- I have found that when I leave it more than a day or so without cranking her, she does not have fuel pickup. So, I throw a splash of gas in the carb, she hits and starts drawing. For the rest of the day, seems ok with all starting. I have also noticed that sometimes when restarting after a couple hours she seems "laggy" until I rev it a few times then she clears up.
Question? - what can I do to avoid having this situation? I've had a few ski boats with the same engine and they always cranked right up.
I appreciate any insight and tips

Yes sir, I hit the throttle 3 times. I did notice that I am not getting fuel in the carb when I look in there. ... But after that first shot, yes she has fuel a plenty.
... I should note that I don't sit on the starter for 15 to 20 seconds. I don't want to burn anything out by doing that. .. but I would think the bowls keep a bit of fuel in them that could start her moving even after sitting a few days.

I will, thank you!