boat hull has a big dip in it over 1 " help please

[slogen]

i am restoring a 14 foot thundercraft, near the back it has a huge dip its over an inch the person i got it from did a bad repair job how do i repair it

 

[Bondo]

Re: boat hull has a big pip in it over 1 " help please

Re: boat hull has a big pip in it over 1 " help please

Ayuh,... Welcome Aboard,... Got any Pictures,.. Post 'em in 480x640...

 

[slogen]

Re: boat hull has a big pip in it over 1 " help please

Re: boat hull has a big pip in it over 1 " help please

i mean to say DIP not Pip
I attached the pictures

 

[Bondo]

Re: boat hull has a big pip in it over 1 " help please

Re: boat hull has a big pip in it over 1 " help please

Ayuh,... you've got a Real problem,...
Can you post a picture of the inside of the hull in that area,..??
When I get home tonite, I'll post more, hopefully, you'll have more pics...

It's fixable, but I'd like to see the other side 1st...

 

[Bondo]

Re: boat hull has a big pip in it over 1 " help please

Re: boat hull has a big pip in it over 1 " help please

Ayuh,... This is better,... My own keyboard...

That dip was probably caused by an ill fitting trailer over time...
There's basically 2 ways to Fix it,...

Push down from inside the hull,+ stiffen your supports...
Or,...
Fill the whole low area with fairing putty on the outside...

The 1st way is Better...

 

[slogen]

Re: boat hull has a big pip in it over 1 " help please

Re: boat hull has a big pip in it over 1 " help please

Ayuh,... This is better,... My own keyboard...

That dip was probably caused by an ill fitting trailer over time...
There's basically 2 ways to Fix it,...

Push down from inside the hull,+ stiffen your supports...
Or,...
Fill the whole low area with fairing putty on the outside...

The 1st way is Better...

yes i a gree the first way would be better but he had already atempted to build it up so if i jacked it up all the new glass would crack i tried pushing it up be fore there is zero flex in it. i think this guy crashed the boat bad there was an arm of a muskoka chair sticking up threw the back of the hull. if both sides arnt perfectly straight will the boat not drive straight?

 

[Bondo]

Re: boat hull has a big pip in it over 1 " help please

Re: boat hull has a big pip in it over 1 " help please

if both sides arnt perfectly straight will the boat not drive straight?

Ayuh,... Generally speakin',...
The last 4' of the bottom hull surface is the Most important place that things gotta/ otta be as straight, true,+ sharp as Possible....

In other words,... There's really no tellin' how it'll handle the way it Is,....
Other than it's gonna be nose down with that hook...

 

[Mark42]

Re: boat hull has a big dip in it over 1 " help please

You said he tried to fill it. I would drill a couple of holes, about 3/8 or 1/2" to see how thick the hull repairs are. Then you can grind away the new layers, cut along the edges of the hull to free the bottom from the chine and flatten the hull with ply on the inside. Then re-attach the cut areas and work it from there.

 

[redfury]

Re: boat hull has a big dip in it over 1 " help please

I was thinking along the same lines....grind the inner hull thin and then straighten it with whatever you need to get it straight. If that means screwing it into 2x6's and then glassing over the top of the screws and then cutting the screws out and then filling the screw holes with epoxy/fairing....much better way to fix it than to fill the bottom and make it straight that way...

You could always chainsaw the back of the boat off and lengthen it by 5 feet and make a 19 footer out of it....not like that's never been done before

 

[Bondo]

Re: boat hull has a big dip in it over 1 " help please

You could always chainsaw the back of the boat off and lengthen it by 5 feet and make a 19 footer out of it....not like that's never been done before

Ayuh,....

I'd still like to see the inside.....

 

[jonesg]

Re: boat hull has a big dip in it over 1 " help please

That can easily be re-formed .
Put a heat lamp underneath, wait until you can feel the heat through the glass, then put a heatgun on the outside, get it blistering hot so the paint is reacting. Than place a form against it from underneat and apply pressure as it cools. Check with your level as it cools, should be able to do it in one shot.

Grind and glass the inside surface if possible to reinforce it and convert your trailer to a bunk trailer.

 

[Mark42]

Re: boat hull has a big dip in it over 1 " help please

That can easily be re-formed .
Put a heat lamp underneath, wait until you can feel the heat through the glass, then put a heatgun on the outside, get it blistering hot so the paint is reacting. Than place a form against it from underneat and apply pressure as it cools. Check with your level as it cools, should be able to do it in one shot.

Grind and glass the inside surface if possible to reinforce it and convert your trailer to a bunk trailer.

I've done something similar to fiberglass fenders and hoods that were pulled from the mold too soon and warped. Heat and bend back to shape as it cools. But that was fresh 'glass, I didn't know it could be done to old 'glass too.

 

[Yacht Dr.]

Re: boat hull has a big dip in it over 1 " help please

I've done something similar to fiberglass fenders and hoods that were pulled from the mold too soon and warped. Heat and bend back to shape as it cools. But that was fresh 'glass, I didn't know it could be done to old 'glass too.

IMO you cant do that.. the crosslinking in the resin is done..

Im also with Bondo that inside should be seen.

however there is a possibility that its just a "pre-release" in the mold and it is what it is ( if there is no fiberglass damage then it was mis-shaped in the mold ). If thats the case then just use it and move on. filling that kinda gap with filler is unwise. Should be built up with glass .

YD.

 

[jonesg]

Re: boat hull has a big dip in it over 1 " help please

I've done something similar to fiberglass fenders and hoods that were pulled from the mold too soon and warped. Heat and bend back to shape as it cools. But that was fresh 'glass, I didn't know it could be done to old 'glass too.

Done it loads of times. We're not talking about the titanic here.

 

[slogen]

Re: boat hull has a big dip in it over 1 " help please

That can easily be re-formed .
Put a heat lamp underneath, wait until you can feel the heat through the glass, then put a heatgun on the outside, get it blistering hot so the paint is reacting. Than place a form against it from underneat and apply pressure as it cools. Check with your level as it cools, should be able to do it in one shot.

Grind and glass the inside surface if possible to reinforce it and convert your trailer to a bunk trailer.

IT WORKED!!!!! i put a heat lamp under it and put a heat gun on the topped then i put a bottle jack under it and pushed it up its colling down now then im going to load it up on both sides with glass. it wuz out one inch now its out a bout one eight out thank you guys for all the advice it was greatly apreaciated ill be sure to keep you guys posted with pictures thanks SLOGEN....

 

[ondarvr]

Re: boat hull has a big dip in it over 1 " help please

Push it the last little bit to get that 1/8" out and then put a stringer or something similar on the inside to keep it the correct shape. Also check the trailer to see if that's what caused the problem, adjust it if it is.

 

[slogen]

Re: boat hull has a big dip in it over 1 " help please

Push it the last little bit to get that 1/8" out and then put a stringer or something similar on the inside to keep it the correct shape. Also check the trailer to see if that's what caused the problem, adjust it if it is.

im going to rebuild the trailer completly its all bent outta wack

 

[jonesg]

Re: boat hull has a big dip in it over 1 " help please

Push it the last little bit to get that 1/8" out and then put a stringer or something similar on the inside to keep it the correct shape. Also check the trailer to see if that's what caused the problem, adjust it if it is.

Ditto , it'll never move again.