What's under my spongy deck ?!!

73 Dolphin

Petty Officer 1st Class
Joined
Oct 8, 2008
Messages
306
So i went and bought a 1973 Dolphin Bow rider. The price was right as it has a running 125 Force and a twin Axel aluminum ez-loader trailer in great shape with good tires and no rot. And as i new nothing about boats - it was perfect! The guy who sold it to me kept saying " it is what it is" which should have put me off,but......

This isn't one of those little bow riders they make these days that you can lean you elbow on deck when it's on the trailer. This one has a deep hull. It's about four feet at the deepest from bottom to top of the hull.

The transom has been re-done, but there is a spring board effect in the middle of the deck. Literally dead center.Spongy is the word that gets used alot in the forum.

The question is, if I pull up the deck, what am i likely to find? ( other than rotten stringers and a sinking feeling? )A few people have told be that there is unlikely to be foam down there ( given the age) Seems like there would be.

Also if it is rotten and needs replacing, can it be done on the trailer or by removing the deck does it take some rigidity away that might cause a problem while fixing it on the trailer?

The deck is fiberglassed over ply and original.

The rest of the deck seems solid. no soft spots around the edges. When i tap the stringers at the rear near the bilge it's a good solid sound.

The bench seats are old kitchen cabinets (fiberglassed)that were screwed through the deck - the screws have come loose and over time it looks like water got in there and lifted the glass from the ply.

Thanks in advance.
 

oops!

Supreme Mariner
Joined
Oct 18, 2007
Messages
12,932
Re: What's under my spongy deck ?!!

So i went and bought a 1973 Dolphin Bow rider. The price was right as it has a running 125 Force and a twin Axel aluminum ez-loader trailer in great shape with good tires and no rot. And as i new nothing about boats - it was perfect! The guy who sold it to me kept saying " it is what it is" which should have put me off,but......

This isn't one of those little bow riders they make these days that you can lean you elbow on deck when it's on the trailer. This one has a deep hull. It's about four feet at the deepest from bottom to top of the hull.

The transom has been re-done, but there is a spring board effect in the middle of the deck. Literally dead center.Spongy is the word that gets used alot in the forum.

The question is, if I pull up the deck, what am i likely to find? ( other than rotten stringers and a sinking feeling? )A few people have told be that there is unlikely to be foam down there ( given the age) Seems like there would be.

it depends on the builder of the boat and what rules they had in 73 ....but yes...you are likely to find wet foam of some sort

Also if it is rotten and needs replacing, can it be done on the trailer or by removing the deck does it take some rigidity away that might cause a problem while fixing it on the trailer?

depends on the trailer...and how well it is supported on the trailer...bit in most cases...yes

The deck is fiberglassed over ply and original.

The rest of the deck seems solid. no soft spots around the edges. When i tap the stringers at the rear near the bilge it's a good solid sound.

The bench seats are old kitchen cabinets (fiberglassed)that were screwed through the deck - the screws have come loose and over time it looks like water got in there and lifted the glass from the ply.

Thanks in advance.

you may have gotten lucky....but search core sample......and take a look...

it doesnt matter what you have under there....it can be fixed for little money...under a grand....and it will be done forever....it just takes time.

look at the thread called pics of work so far...it is also a tri hull.....read jason j's skanky beast in the compleated projects restoration section.

weve all been there.....we can walk you right thru it.......
this forum is fantastic, and the people here really know there stuff and are willing to help you...

cheers
oops
 

oops!

Supreme Mariner
Joined
Oct 18, 2007
Messages
12,932
Re: What's under my spongy deck ?!!

btw....welcome to i boats :)
 

jcsercsa

Captain
Joined
May 21, 2007
Messages
3,401
Re: What's under my spongy deck ?!!

HI 73 Dolphin . Welcome !! your in the right place , we will walk you threw this , I just mine back in the water here last month !! Man what a felling when you get her back in the water !! so any help you heed just post here and we will help all we can !! so for now read read read !! lol John
 

73 Dolphin

Petty Officer 1st Class
Joined
Oct 8, 2008
Messages
306
Re: What's under my spongy deck ?!!

Thanks - nice clear pictures - looks great now.
 

73 Dolphin

Petty Officer 1st Class
Joined
Oct 8, 2008
Messages
306
Re: What's under my spongy deck ?!!

Yes i was!

Now the question you've all been waiting for. If the stringers are mush - can I take her out just for a little bit? !! LOL.

Upon closer inspection the fiberglass over the stringers near the bilge has cracked. I managed to dig in with a screwdriver and pull a bit of wood off. It wasn't like potting soil,but definitely dark, damp and softer than it should be.
I had to work to pry it off (about the size on a fat grain of rice).It didn't splinter. A gouge if anything.

Also it's the bilge area and probably some water sat there for a while.

This is the plan - and please let me know if this is a good idea.

The deck is made of sections of ply covered with fiberglass. i want to remove ONE section. In your experience is it best to take up the front mid or rear section to get a good idea of whats going on?

This way if all looks good I can replace and re-glass.

I'll include some links to some pictures.
And , no - the kitchen cabinets were not my idea!!![URL="http://s489.photobucket.com/albums/rr256/73_Dolphin/?action=view&current=100_0202.jpg"][URL="http://s489.photobucket.com/albums/rr256/73_Dolphin/?action=view&current=100_0186.jpg"]http://s489.photobucket.com/albums/rr256/73_Dolphin/?action=view&current=100_0204.jpg[/URL][/URL]
 

jcsercsa

Captain
Joined
May 21, 2007
Messages
3,401
Re: What's under my spongy deck ?!!

OHHH man I would have bought that boat just for the cabinets !!!! hahahha

If the hull on the transom is with out cracks , you could probley run her for a bit , if that all the bigger spot on the beck is you should be ok !!!!!!

On thanking out parts of the deck and redoing them , I really dont think that will work , if there is rot on the floor there is rot in the stringers !!! Its really not that hard to do we all will walk you threw it !! you have to decide to do it thow !!! John
 
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