25 year old crack

[cpdad93]

About 25 years ago,the original owner of my R

aysoncraft hit a rock at Lake San Antonio. They did a quick repair (resin over crack, new oil pan, new strut and shaft) to get it back i the water for the weekend. well, it is finally coming apart and since the boat is going under the knife anyway, it needs fixed. Any input is appreciated. First thought, grind off the excess resin down to the spider crack, v-groove and feather out the crack area, glass in the v-grooves, then about three layers of glass on that. Peculiar as the cracks seem to not be showing on the bottom side.

 

[Shrub Lurker]

I have used this on cracks both mine and on others: many boat builders use one strip of this to "tab" their hulls with their decks. Strong shiat !

 

[lenmann]

The area that is cracked and immediately surrounding it needs to be ground away at a 12:1 ratio based on hull thickness from both until the crack are no longer visible and laminated back up to the original thickness using the resin and cloth of your choice. The 1708 biaxial noted above is a great choice.

 

[lenmann]

 

[cpdad93]

It looks like the resin they added on top of the crack is what is delaminating as they never properly repaired it. Should I grind down a large area with the long board or individually work my may down at each crack?

 

[cofooter]

Do what Lenmann said and dish out the whole cracked area using a 40G disk on an angle grinder and re-lay it up as the pictures shows. Grinding out and repairing each crack wont give is close to the needed strength and it is going to come back. If the crack goes all the way through the keel dish it out halfway, repair and do the same to the outside, This is a critical area for strength.

 

[LazyLavey]

Somebody say crack?

 

[Kachina26]

I was hoping for something more along the lines of...

 

[cpdad93]

Somebody say crack? View attachment 761754

is that Clayton Bigsby?

 

[LazyLavey]

is that Clayton Bigsby?

Tyrone Biggums

Clayton.....the black KKK guy

 

[coolchange]

That crack appears to be in the flow coat.
On top of the plywood. Not structural. Hard to tell from the pictures.

 

[cofooter]

That crack appears to be in the flow coat.
On top of the plywood. Not structural. Hard to tell from the pictures.

Hard to tell, was assuming it was the keel where the underwater gear bolts through where is is solid glass.