Soft Spot on Deck & Possible Wet Foam

chishol7

Cadet
Joined
Feb 11, 2012
Messages
11
Hi guys, I am hoping to get some advice regarding a possible restoration on a 1994 Pro-Line 231 WA w/5.7 Merc Bravo 1. The boat has always been trailered and stored indoors with less than 700 hours on the engine. I have two primary concerns; the boat seems heavy to me and the deck has a soft spot next to the engine hatch.

I am worried that the boat is heavy based on the fact that the thru-hulls for the deck drains are just below the water level when nobody is aboard and carrying full fuel. I have talked with numerous people regarding this situation and have received conflicting answers, some say that the I/O version of this boat always sat that way and others have told me that it is definitely wet foam. FWIW the boat achieves the factory specs for WOT and time to plane. I will be weighing the boat as soon as I get a chance but thinking ahead I am just trying to get an idea for how a restoration goes on a walkaround. Also, from what I have been told, the stringer system in this boat is 8?-12? wide. I have done a lot of reading about re-doing stringers that are essentially plywood but have not seen anything that is really wide like this so I am curious if anyone has any advice regarding this type of system?

I also have to deal with a soft spot in the deck on the port side next to the engine hatch and am wondering what the best way to take care of it is? Never had a problem until a large friend (350+) stepped down on it last summer, you could hear the cracking noise when he got in. This particular spot is suspended above the motor mounts, there is nothing underneath. There is about a foot of deck running fore and aft that is suspended between the engine (unsupported on the engine side) and stringers. Also, I can see that the soft spot is on a seam in the plywood decking. The rest of the deck feels solid, I literally jumped up and down (I am 275) all over it without feeling any type of give. So my question is, if the scale shows no significant extra weight is there a professional looking way of doing a spot repair on the deck?
I apologize for the long winded introductory post, just trying to prevent a 20 page job if possible. Any advice or comments are greatly appreciated. Thanks,
Jeremy
 

tpenfield

Moderator
Staff member
Joined
Jul 18, 2011
Messages
18,448
Re: Soft Spot on Deck & Possible Wet Foam

That is a solid fiberglass floor on that boat (right?). Usually there is plywood backing supporting the glass. So, my guess would be that it is deteriorating. It would be best to start looking below and poking around to see what's up. Take and post some pics if you can.
 

chishol7

Cadet
Joined
Feb 11, 2012
Messages
11
Re: Soft Spot on Deck & Possible Wet Foam

That is a solid fiberglass floor on that boat (right?). Usually there is plywood backing supporting the glass. So, my guess would be that it is deteriorating. It would be best to start looking below and poking around to see what's up. Take and post some pics if you can.

The deck is essentially just plywood. The wood was all taken out for the 95 model year but mine is plywood deck with wood somewhere in those wide stringers... Whatever the top is, it is very thin. I am on a business trip this week (how else does a guy who is married with children have time to worry about his boat?) so I will post pics when I get back next week.
 

chishol7

Cadet
Joined
Feb 11, 2012
Messages
11
Re: Soft Spot on Deck & Possible Wet Foam

I had a chance to look closer at the boat last week as well as get a weight. The great news is that the boat weighs exactly what it is supposed to so a full resto is not required.

I still have to figure out how to fix the deck. After a closer look I realized that I was wrong, the deck consists of a 1/2" layer of fiberglass with a wood subfloor underneath. The wood subfloor does not extend into the engine cavity so there is a 27" x 10" area of 1/2" glass suspended over the engine mounts. A few people have suggested that I fix this the way that sagging floor joists in an old house would be fixed. . . build some support from the bottom that will prevent sag. While that would hide the symptom, it would not fix the problem. So how does one go about fixing something like this? TIA
 
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