I just got a 16" Magnum mod 151 . The guy I got it from said he replaced the floor about 4 years ago. I found out he ment the plywood over the deck. It was warped and loos so I took it out and . stepped thru the deck.There is a lot of rotted wood floating in the water under the deck, which I just drained. I havent cut into the deck yet to see how bad it is. Guess my ? is .. Is it even worth cutting in there it looks really bad. From about 1/4 of the way from the back to just behind the walk thru ,and nearly all the way to the sides is soft. Well I will be looking at it more this week and will post pix if I can ...