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View Full Version : Crack in Center ballast Tank.


Grantx15
08-13-2010, 02:33 PM
Has any one ever had a Centerbalast tank Crack on mastercraft?? if soo any ideas on how to patch it? fiberglass did not hold. its a hair line crack at the top seem

CantRepeat
08-13-2010, 03:01 PM
What is the tank made of?

get_sum
08-13-2010, 05:00 PM
I dunno, but I'd try silly puddy. I mean no one ever sees it anyways. I've seen that stuff hold a break together so well, that the next time it broke, it broke around the puddy.

Grantx15
08-18-2010, 03:02 PM
it is a poly tank, i tried to patch it with Fiber Glass Resin/ fiberglass sheets. about 3 layers thick. it held to the tank bu amazingly the water flows under the glass and out some how. so silly puddy im not so sure will do the trick but i could try it. i also was told to try water weld (JB weld_) but im not so sure that will stick polly either.

CantRepeat
08-22-2010, 10:27 AM
What about some of those non hardening two part epoxies?

I would think you would need to scuff it up a bit with a scotch bright pad before attempting fix it.

Thrall
08-22-2010, 11:20 AM
Warranty? Have you called MC dealer? They may have some way to do it without splitting the tub out of the boat.
Be more specific on how/why it cracked. I figured they'd be indestructible unless not winterized with a bunch of water left in.

mtajpa
08-22-2010, 11:30 AM
The site below is something I used to repair my rv tanks and has worked well. If you have a crack you will need to drill a hole at each end of the crack or it will continue to crack after the repar.

http://www.shoprvparts.com/product.do?no=12573F

Grantx15
02-23-2011, 03:18 PM
I just ordered that Plastic Tank & Radiator repair kit hopefully that works, i will try it out when the weather starts to warm up which is hopefully in a couple weeks.
- I did end up scuffing up the tank around the crack and trying Water weld (JB weld) that also did not work IT it held on the tank great and hardend like steel but some how the water cracked right through it with in two fills of that tank.
i dont understand how there could be that much water pressure inside the balast tank.

AS for how the tank cracked. i have no idea, im clueless. there was never water left in the tank. and there is never any weight on the tank. as for warrenty i dont believe i have one i bought the boat used. last year. and the boat is a 2007.
im thinking the tank was origionally deffective though. but i will try the Plastic tank repair kit. i hope it works

willyt
02-23-2011, 04:01 PM
IIRC there was a thread around here that stated the cracking pressure of the KGB tanks was actually below what the jabsco puppy pumps could provide. if it doesnt vent, tanks will go boom.

jrbishop4
02-23-2011, 11:04 PM
I have used the plastic tank repair on my rv holding tank too and it has been good for about 4 years now.

I have a buudy with a 07 X15 that had the same problem but his was under warrenty. It got sent back to the factory to fix becaue they had to split the boat in two to get it out. Good luck getting something to work because i would guess it's not cheap to have it replaced.

Grantx15
02-24-2011, 08:41 AM
Thanks,
yeah when the weather warms up im going to try my best to seal it with the plastic tank repair.
its in such a bad spot too, the crack is on a corner and on the edge of the top and side. so its right in the seem.. the only good thing is that its pretty ez to get too right through the Center Drain access opening.
If this Plastic Tank repair kit doesnt work.. im not sure what the next step will be... maybe ten rolls of Ducktape and ill just go to town on it. haha
i will keep you posted on how it works out. and ill tyr and get pics too
Thanks

Table Rocker
02-24-2011, 08:47 AM
My suggestion would be to reinforce the patch with something like a piece of screen to give your adhesives more strength. Spread your adhesive on, then the screen, then more adhesive. If you patch a wider area and reinforce, you will have better results.

Grantx15
02-24-2011, 11:02 PM
yeah when i get the plastic repair i will try that.
when i first tried to fix it i used fiber glass resin and fiberglass sheets. i made it about 4 inches wider than the actualy hairline crack. but the fiber glass did not hold to the poly tank and the water blew it off. but ill try that same idea but with the plastic repair kit.
thanks

Grantx15
05-09-2011, 09:49 PM
The site below is something I used to repair my rv tanks and has worked well. If you have a crack you will need to drill a hole at each end of the crack or it will continue to crack after the repar.

http://www.shoprvparts.com/product.do?no=12573F

This did the trick!! so far so good. the tank is not leaking.

CantRepeat
05-09-2011, 09:59 PM
This did the trick!! so far so good. the tank is not leaking.

That's awesome!! Glad it work out for you.

Grantx15
05-18-2011, 07:48 AM
Well... its back to the drawling board on this one. shes Pissing water again Straight through the RV tank epoxy.... it held for one fill. i took the boat out a second time filled it up... it held for about 5 seconds then shott a hole right through the patch....
there must me a crazy amount of pressure that is filling into this tank. why so much pressure? i dont understand its not just a small dizzel leak. when it leaks it comes out like a a supersoaker!

. that patch kit worked for one run. i may try and put twice as much on and cover it better.

CantRepeat
05-18-2011, 08:45 AM
Well... its back to the drawling board on this one. shes Pissing water again Straight through the RV tank epoxy.... it held for one fill. i took the boat out a second time filled it up... it held for about 5 seconds then shott a hole right through the patch....
there must me a crazy amount of pressure that is filling into this tank. why so much pressure? i dont understand its not just a small dizzel leak. when it leaks it comes out like a a supersoaker!

. that patch kit worked for one run. i may try and put twice as much on and cover it better.

Did you check the vent line to make sure it's not clogged some how?

Hrkdrivr
05-18-2011, 12:22 PM
You got me thinking on this one...how did you even know it was leaking? I don't know if I would have noticed??

Grantx15
05-18-2011, 11:04 PM
i thought that too, but the line must not be clogged Bc when the patch job did hold it over flowed out the side of the boat when filled like it should.. but i am able to tell it is leaking when it doesnt over flow out the side of the boat or it just dripps out. meaning that the water is comming out some where else. and when i opened up the circle opening in the center of the boat where you put your plug in. it was all filled with water from the ballast tank leakin.

Grantx15
05-31-2011, 08:02 AM
Alright so far so good,
i used a box knife and cut the crack open wider, not to much though. then i filled the crack with the plastic tank & radiator repair kit (two packages of this stuff) so far its holding strong. i filled it many times over the weekend. i think its good to go.

Grantx15
06-29-2011, 08:07 AM
FAIL!
once again the patch job didnt hold. since its impossible to replace the KGB with out splitting the boat. has any one every cut out the polly tanks and replaced them with fat sacks???
this is my next option.

Ortho
08-07-2011, 11:38 PM
Grantx15-
Did you find a solution to your problem. I've got 2006 X15 with the same problem. I have tried at least 10 different epoxies, tank patch, glue etc. Nothing will stick to this plastic!

Desert eagle
08-08-2011, 02:16 AM
I repaired a polly tank on a radiator reservoir for my RV this last winter and it is still holding up.
Get yourself a heat gun that will get hot enough to melt the polly, and weld the tank back together.

sand2snow22
08-08-2011, 02:31 AM
I repaired a polly tank on a radiator reservoir for my RV this last winter and it is still holding up.
Get yourself a heat gun that will get hot enough to melt the polly, and weld the tank back together.

Just make sure it is a ballast tank and not the gas tank :D

Jerseydave
08-08-2011, 09:12 AM
Grant try taking your boat to a radiator repair shop (Fingers radiator on route 130 maybe?) and see if they can repair it right in the boat. I'd hate to see you cut-out that tank but I guess that's a last resort.

c640947
04-19-2013, 02:46 PM
I would like to revive this thread as my 06 X2 is leaking in the exact same spot and I have tired a couple of different options to seal the crack with the same results as the original poster. Has anyone managed to fix a leaking KGB tank? Or have any suggestions that are different than what was already tried?

Andrew

JRW160
04-19-2013, 04:03 PM
I friend of mine had his 07 tank start leaking about 3 or 4 years ago. The dealership had his floor marked up to cut into it to repair the crack. At the last minute, they went another route. They had a guy come in and plastic weld it. I'm sure if you called around, you could find someone in your area who has the tools to weld polyethylene tanks. He just sold the boat a couple of weeks ago, and it was still holding strong.

Bungee55
07-22-2013, 08:02 AM
98063

98064

98065

98066

98067

98068

Hrkdrivr
07-22-2013, 09:32 AM
duplicate post

Hrkdrivr
07-22-2013, 09:34 AM
Bungee55, wow! Amazing piece of engineering, but, wow!

Who fabricated the piece? Did it work?

Bungee55
07-29-2013, 07:59 AM
Hrkdrivr, so far so good, I have been riding with factory and pro ballast again. I will give an update when I get more time on this fix.

Curtrwall
08-22-2013, 09:34 PM
Subscribed! My (new to me) 06' X-30 is great but after about the 3rd time surfing I notice I would bilge shortly after filling the KGB. I haven't had time to trouble shot the leak but it sounds like this is the culprit.

mastercraft1995
08-23-2013, 02:07 PM
http://www.homedepot.com/p/USeal-Band-6-in-Aluminum-Foil-Self-Adhesive-Repair-Tape-8872AF6/202086180#customer_reviews

Is what I have on my tanks and they don't leak.