I have a 2000 donzi 28zx with twin 350 mags, and the person that winterized it didn't get all the plugs in from winterization! I keep taking on water and I'm sure I'm missing some plugs. Does anyone have a diagram as to where they are and or how many there are per engine? I did order a cone kit to hook up water but want to get it fixed before if possible.
Thanks!

why not run it on the hose and look to see where the waters coming from.

Maybe that's what he is referring to as a cone kit ? I dunno.

MPI with the one point drain?? All hoses attached?

Start at 20:35 shows the locations of the 4 plugs - name the 2 B*tchy ones behind the cool fuel.. (The vid doesn't show the plugs on either side of the block as engine in vid doesn't have One Point)....(have also seen a cooler split for hard to trace water leaking into bilge)

another basic 5 plug style drain plug location vid (pre one point drain)

There are differences by year but my 2001 350s have:

1 per side of engine block
1 at fuel cooler
1 at water pump elbow
1 at each exhaust manifold bottom
so, 6 each engine for mine...

but yea, run it on a hose and see what leaks lol