Had a problem this weekend at the river. Boat runs fine above 1800rpms but after a cruise when I slow down below 1800rpms it loads up doesnt want to idle blows black smoke then would die and wont start until it sits for awhile(flooded). I pulled the sight plugs after it died fuel came out of front one, after I finally got it restarted I checked float levels seemed close but I adjusted it down a little anyway. ran the boat again when I slowed down did same thing would not idle, black smoke, etc. so i pulled sight plugs again front one had fuel coming out. Again after finally getting it restarted pulled sight plug and it was below hole.
Today i pulled that bowl off everything is clean inside needle &seat move freely.Carb is new only 3rd trip, ran perfect last two trips, fuel pressure is at 6.5psi carb is holley 850dp any thoughts on what it could be.