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Old 03-08-2010, 07:19 PM   #1
bigtrailie OP
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Clarke oversize tank repair

I got ripped off on Flea-bay. When the fuel tank arrived I was more concerned about how it would fit on the KTM 520 exc than with the general condition of the tank itself.

Once I removed the filler cap, I noticed the grey RTV sealant around the base of the filler neck. I filled the tank with water and my fears were confirmed -- the "patch" is not watertight. After removing the sealant, I can now see a crack (void) that goes about half way around the circumference of the filler neck.

Has anyone found a fix for patching up these plastic tanks? I'm guessing that RTV sealant is not the way to go. Anyone out there with successful epoxy experience???
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Old 03-08-2010, 07:37 PM   #2
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plastic welding is probably a better solution...
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Old 03-08-2010, 10:12 PM   #3
ColoradoKen
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+1 re. plastic welding

If it's fixable ... welding is absolutely the way go. That class of plastic typically doesn't "glue" easily/well (or at all ??) and the location at the filler neck doesn't help matters.

Hope you can repair it without too much expense. Don't know what to expect re. cost to plastic weld it ?
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Old 03-09-2010, 02:25 AM   #4
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Yep, plastic weld. A good auto paint store might be helpful... they generally sell the equipment, or at least the various filler rods. If that doesn't work there might be another way, but it won't look pretty. RTV will not withstand constant contact with fuel, but this stuff will.

Aircraft fuel tank sealer by DeSoto... the 1/2 is the working time (1/2 hour).
PRC 1422B 1/2

Or ProSeal...

http://www.aircraftspruce.com/catalo...prosealant.php

edit... Another thought - you might contact the RV dealers, RVs have plastic water & waste tanks that are always gettin hit, they might advise on a reliable repair shop

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Old 03-09-2010, 06:27 AM   #5
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I have a place on my clarke tank that I used jb weld to seal. its been on there for 4 years now. I used some 50 grit sandpaper to roughen it up to help it stick. its a cheap repair and if it doesn't work you can always try something else.
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Old 03-09-2010, 07:26 AM   #6
scooteraug02
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Have you seen this thread:

Repairing cracked or punctured PLASTIC fuel tanks


Contact Ebay for a resolution. Paypal has protection and Ebay has tools to resolve the issue. Most good ebayers disclose defects.


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Old 03-09-2010, 07:43 AM   #7
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Quote:
Originally Posted by Motomedic
plastic welding is probably a better solution...
definitely the best option here. that type plastic can be welded without filler rod if all the pieces are still there and it sounds like yours are,just cracked.

ps
you can use a heat gun and a regular soldering irion in most cases to do this.
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Old 07-16-2012, 02:02 PM   #8
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Do you have to take the gas out?
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Old 08-16-2012, 05:26 PM   #9
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Old 08-17-2012, 01:40 PM   #10
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Originally Posted by junglemototours View Post
Do you have to take the gas out?
Yes. I would take the gas out. A heat gun or soldering iron work at temperatures of 400F and up. Some of the hot air welders we have at work will generate heat >1000F. If nothing else, this will cause the gas to vaporize and increase the pressure at the weld point. Drain the gas and leave the cap off while welding.
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Old 08-17-2012, 03:08 PM   #11
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I had a leak in my skid loaders fuel tank about 10 years ago. It is plastic also. I went to an auto parts store and they had a plastic fuel tank repair kit. I used it and it has not leaked since. I will say the leaks were from the bolts rubbing on the tank so the holes were not real large but it worked like a charm. Personally I would open a dispute with ebay to get the guy to give back your money if it were me. You will probably have to pay to have the tank shipped back to him though.
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Old 08-17-2012, 03:20 PM   #12
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Wake up guys. This thread is from March, 2010.
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Old 08-17-2012, 04:15 PM   #13
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What year is it now?
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Old 08-17-2012, 07:57 PM   #14
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Originally Posted by mcma111 View Post
Wake up guys. This thread is from March, 2010.
Yeah, but the guy with a branch in his tank is from 2012. That is more recent....
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Old 08-21-2012, 11:00 AM   #15
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Originally Posted by Lesharoturbo View Post
Yeah, but the guy with a branch in his tank is from 2012. That is more recent....
It was a joke....taking the gas out, not the trail plug.

Enduroshack and Clarke both stepped up and gave me a new tank, all good. Now if I can just quit putting holes in my bikes.
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