Carnage: Hull Cracks, I want some repair input.

[WaveDemon]

hey guys, I cracked the side of my ski in a couple of places. I'm pretty sure it happened because I had a bad hood seal (hood was loose). I knew it wasn't good and I didn't fix it. my bad. :banghead:


I want peoples input on how to fix it. I have an understanding of what needs to be done but want some tips.

[Matt_E]

I would grind out the crack (from both sides), drill a hole at the end of the crack. Then glass over the inside with multiple layers that start small and get bigger.
Then make the outside look purdy with epoxy & thickener.
That's how I fixed a gnarly crack in my Superjet.

Thanks Phill.

[WaveDemon]

start small, how small? would you add any cat hair (if you're talking about epoxy resin) to the thickened epoxy?

[Moondance]

start small, how small? would you add any cat hair to the thickened epoxy?i don't have a cat, but i do have plenty of dog hair i'll ship to you:biggrin:

[Matt_E]

I guess you could. I only did epoxy & cabosil (though I have later switched to flour) for the outside.

As for starting small....I would say enough to cover the crack plus at one inch on each side.

[Phill]

I would grind out the crack (from both sides), drill a hole at the end of the crack. Then glass over the inside with multiple layers that start small and get bigger.
Then make the outside look purdy with epoxy & thickener.
That's how I fixed a gnarly crack in my Superjet.

Thanks Phill.



Anytime!:biggrin: :biggrin:

[michael950]

Infraction for Phill, one user account / member....

No Post for YOU...


Ahhh JK... got yah!

[Phill]

^^^^WTF.......are you drunk already!!!

[Matt_E]

I concur...drunk.

[michael950]

Hi, my name is Bryan and I am... wait... I am not Bryan... I am IN Bryan... Bryan, TX. (Bryan/College Station)

I died there, they burried me where they flowers used to grow and it almost drove me crazy... crazy.. I used to be crazy... they buried me...

[michael950]

I concur...drunk.

FoR ME TO POOP ON!!!


Sorry for the thread jsck.

[Ollie Rastabean]

You do good work demon. Glad to see you have graduated from motors to hulls.

You are an animal. What can I say.....

[WaveDemon]

I pulled the stickers and hood seal off and the crack in the corner looks much worse.


BTW my ABC still hurts...

[SuperJETT]

I use a 1/8" spiral bit in the Dremel to grind out cracks, it leaves a nice rounded edge at the ends to prevent stress concentration there, and 1/8" is a good size to fill with resin mixed with filler.

Grind the crack out, fill it with thickened resin then lay glass on the back side while that is still wet so it all bonds well. 15 ounce biaxial non-woven would be my choice for fiberglass.

[jetskier79]

duct it

[WaveDemon]

I use a 1/8" spiral bit in the Dremel to grind out cracks, it leaves a nice rounded edge at the ends to prevent stress concentration there, and 1/8" is a good size to fill with resin mixed with filler.

Grind the crack out, fill it with thickened resin then lay glass on the back side while that is still wet so it all bonds well. 15 ounce biaxial non-woven would be my choice for fiberglass.
would you do that with only one layer? would you use polyester resin?

[Matt_E]

Do not use polyester resin. Personally, I would do at least 3 layers.

[beachjunkey]

Epoxy resin. I'm no pro but I'd think up to three layers of biax on the inside (maybe 4", then 5-6", then 6-7"). Start small on the outside (ie, 1"x2" then 5"x4" of mat) and sand it, fill it, and glaze it smooth. Be sure to glass under the lip too - don't just fill the ridge. You might want to saw a straight line down that crack to give you a nice even crack to grind out. Been there, done that (actually, derm done that but same thing...)

[Idok]

so is this the place to put all the "carnage done by yamasaki pics?"

[Idok]

dont be a hater! i was just trying to motivate you! :biggrin:

seriously though, your boat's got some minor issues.. try changing your magic spark plugs to real spark plugs, for starters. :sneaky:

actually, took her to the pond yesterday...threw on my TLR jetted to what waterfreak and SFL rec'd and she RIPPED>..




now, that boat ripped in the beginning with a 44 too....but not like it felt yesterday....

too bad I had that carb with me the whole time :banghead:

[SuperJETT]

would you do that with only one layer? would you use polyester resin?

I'd say 3 layers of 15 ounce would do it, and never use polyester resin, only epoxy on our hulls.

[WaveDemon]

just ordered bi-axle, epoxy resin, and a new hood seal. I'll probably start a thread on the repair and you guys can let me know how bad I mess it up.

[WaveDemon]

so is this the place to put all the "carnage done by yamasaki pics?"Sorry to burst your bubble doc but I can actually break my own ********. :poke:

[Idok]

dam straight you can brother. :headbang:






yeah but, WHERE do I put the carnage caused by yamasaki pix!?!?!? :crutches: :biggrin: :biggrin: :biggrin:

[Ollie Rastabean]

Under your new post.

Carnage:caused by Yamasaki.

Pics of his busted ass motors and elec boxes that are held together with bubblegum, duct tape and prayers do not count.

Word!

-O

[Idok]

Under your new post.

Carnage:caused by Yamasaki.

Pics of his busted ass motors and elec boxes that are held together with bubblegum, duct tape and prayers do not count.

Word!

-O

noted! pix up tomorrow! :sneaky:

[butti]

so is this the place to put all the "carnage done by yamasaki pics?"



i didnt know it was possible to photograph a bruised ego??:moon:

[TB]

i don't have a cat, but i do have plenty of dog hair i'll ship to you:biggrin:



of course you do moon..shave that furry little thing up :cool2:


:sneaky: am i the only one here that thought dirty after reading this?????:sneaky:

[WaveDemon]

thanks for the help guys.

I bought a rotozip cutting bit and cut out the cracks with my drill. ground out the inside edges, and sanded/roughted up the cracked area + the whole lip on that side. I placed a couple of 2"x4" 17 oz biax with epoxy resin slightly thickend then a 4x4 patch then a 4"xlength of whole left side lip. I let it dry for half a day and brought it inside and thickend up some epoxy resin to about the thickness of peanut buter and filled in the outside of the cracks. tomorrow I'll get out my cut off wheel and trim up the excess fiberglass sticking out past the lip.

I'd take pix but someone broke into the house and stole our camera last week. :scared:

[beachjunkey]

I'd take pix but someone broke into the house and stole our camera last week. :scared:

What kind of ghetto do you live in?? :dunno:

[WaveDemon]

I don't know, I just moved here.

We just bought a dog today to keep those fools out!

[waterfreak]

yep, those TLR 48's are money. I still remember when todd started making them down here. everyone else soon followed.:bs2:

Actually, I remember when Scott Randall (SRE) was making them for the Russians (and for Rick Roy) way back; and when he dissapeared , they asked todd to DUPLICATE them . Also, I was working at R&R jet tech when Todd brought the carb to Ron the machinist to duplicate!