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Author Topic: Plastic gas tank repair question  (Read 1683 times)

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Offline Jim_Rogers

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Plastic gas tank repair question
« on: May 05, 2018, 01:24:52 PM »
On my Woodmizer mill I have a red plastic gas tank.
One seam is starting to weep a big of gas.
I just checked the FAQ of flex seal and it says you can't use it on gas tanks.

does anyone know of a easy to use, easy to get, plastic gas tank repair product?

Jim Rogers
Whatever you do, have fun doing it!
Woodmizer 1994 LT30HDG24 with 6' Bed Extension

Offline Magicman

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Re: Plastic gas tank repair question
« Reply #1 on: May 05, 2018, 01:39:31 PM »
The Sun's UV rays are generally what kills plastic products.  This constant exposure causes the plasticizers to migrate to the surface and evaporate making the plastic brittle as well as loosing it's color.  I am not aware of a viable fix other than replace. 
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Offline Jim_Rogers

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Re: Plastic gas tank repair question
« Reply #2 on: May 05, 2018, 01:53:42 PM »
A long time ago, when I drove home from a road job, I forgot to secure my jug cover with the hold down straps. And it blew away. I drove up and down the highway looking for it but I couldn't find it.
I need to get another one, so my jugs are not in the sun.
Until then they are unless my tarp is over the mill for rain.

Jim Rogers
Whatever you do, have fun doing it!
Woodmizer 1994 LT30HDG24 with 6' Bed Extension

Offline Barebuttminer

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Re: Plastic gas tank repair question
« Reply #3 on: May 05, 2018, 02:32:05 PM »
On my Woodmizer mill I have a red plastic gas tank.
One seam is starting to weep a big of gas.
I just checked the FAQ of flex seal and it says you can't use it on gas tanks.

does anyone know of a easy to use, easy to get, plastic gas tank repair product?

Jim Rogers
Jim;
Iíve tried several fixes on plastic tanks most donít work as advertised. What I found that works the best is a product from Eclectic called Seal All, it is gas & oil resistant and can be used on plastic.  http://eclecticproducts.com/seal-all.html
The only permanent fix, that I have found and the least expensive, is to weld with a soldering iron using strips of plastic cut from an oil jug as filler.
BBM
Wood-Mizer LT15, John Deer 450C Dozer, Husqvarna 455 Rancher, Stihl 009

Offline Jim_Rogers

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Re: Plastic gas tank repair question
« Reply #4 on: May 05, 2018, 03:57:52 PM »
On my Woodmizer mill I have a red plastic gas tank.
One seam is starting to weep a big of gas.
I just checked the FAQ of flex seal and it says you can't use it on gas tanks.

does anyone know of a easy to use, easy to get, plastic gas tank repair product?

Jim Rogers
Jim;
Iíve tried several fixes on plastic tanks most donít work as advertised. What I found that works the best is a product from Eclectic called Seal All, it is gas & oil resistant and can be used on plastic.  http://eclecticproducts.com/seal-all.html
The only permanent fix, that I have found and the least expensive, is to weld with a soldering iron using strips of plastic cut from an oil jug as filler.
BBM
BBM, I'm going to try it and see how it works for me.
Jim Rogers
Whatever you do, have fun doing it!
Woodmizer 1994 LT30HDG24 with 6' Bed Extension

Offline bill m

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Re: Plastic gas tank repair question
« Reply #5 on: May 05, 2018, 05:05:52 PM »
I have a couple of gas tanks I have fixed with a soldering gun. Both have held up fine for about 8 years now.
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Offline goose63

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Re: Plastic gas tank repair question
« Reply #6 on: May 05, 2018, 08:18:40 PM »
With a soldering gun and some zip ties wou can weld plastick done it many times
goose
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Offline Southside logger

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Re: Plastic gas tank repair question
« Reply #7 on: May 05, 2018, 09:09:52 PM »
I tried in vain to fix mine last year when it had the same problem, yup I fixed the leak, then another one showed up, I ended up replacing it after spending a lot of time fixing it. 
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Offline Corley5

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Re: Plastic gas tank repair question
« Reply #8 on: May 05, 2018, 09:54:04 PM »
We used to fix old Ski Doo tanks with a soldering iron and the plastic six pack holder rings.  
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Offline Gary Davis

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Re: Plastic gas tank repair question
« Reply #9 on: May 06, 2018, 11:07:50 PM »
the uv light destroys the plastic just get a new one from wood mizer they are not that expensive I have had to replace my lube tank and gas tank  

Offline justallan1

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Re: Plastic gas tank repair question
« Reply #10 on: May 07, 2018, 12:33:16 AM »
I think I'd just get a new one, then I know I can walk out to the mill at any given time and not have to wonder when it's going to fail again.
If it were the coolant tank I might push my luck a bit more, knowing that I can just hook up any jug that I found for the day and worry about it later.

Online Crusarius

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Re: Plastic gas tank repair question
« Reply #11 on: May 07, 2018, 12:39:58 PM »
After having many offroad miles on my jeep and having to do many trail fixes just to get home I learned a few things. 

The most important one is radiator stew. normal black pepper will seal a radiator long enough to get you home and then some depending on the hole. Even when the fan takes a bite out of the radiator.

The second most important one is gas tank temporary seal. Take a normal bar of hand soap and rub it over the leaking area. Don't ask me how it works or why but it will stop the leak. This is a temporary fix as it does wash off in the rain :) has to be bar soap.

I had a friend of mine that poked a hole in his fuel tank while working under his jeep. He called me asking what to do. I told him grab a bar of soap and rub it on the leak. It sealed it for about a month till he could replace the tank. It was raining during that month so my friend did a couple reapplications but it never leaked.

One disadvantage to the soap trick is now anything that may have bonded to the tank before definitely will not bond anymore. But overall it works as a trail fix.
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Offline KirkD

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Re: Plastic gas tank repair question
« Reply #12 on: May 07, 2018, 04:06:58 PM »
I think I'd just get a new one, then I know I can walk out to the mill at any given time and not have to wonder when it's going to fail again.
If it were the coolant tank I might push my luck a bit more, knowing that I can just hook up any jug that I found for the day and worry about it later.
I am with you since it is gas don't fix it unless it is temporary. If that is what you want to do clean it good rough it up with sand paper and put JB Weld on it.
On my 89 LT40 I bought a 2.5 gallon outboard motor tank and it fits perfect in the tank mount and straps down like it should. I put a marine quick coupler on the tank so all I have to do is pop it off and take it inside when I am not using the saw.
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Offline 78NHTFY

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Re: Plastic gas tank repair question
« Reply #13 on: May 07, 2018, 05:41:08 PM »
UV killed both my water and gas tanks on my LT40.  Thought the Woodmizer replacements would still not be UV protected (and expensive) so bought red plastic gas tanks (5 gal) at a box store. A little drilling and attaching and good to go.  If I remember, you have to drill the hole in the gas tank close to the fill hole in order to get your fingers inside it to hold and turn the nut on the gas line fitting.  Took a bit but I managed.  When working, I keep the cap on the gas fill a turn loose to allow for vent/gas flow.  For me it was issue of Time is Money: aside from trip to the store, took me an hour for each tank.  Good luck with whatever you choose to do, but think safety...  All the best, Rob.
If you have time, you winÖ.

Offline Jim_Rogers

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Re: Plastic gas tank repair question
« Reply #14 on: May 17, 2018, 04:30:43 PM »
At the end of the day, yesterday, my gas tank was almost empty.
So I opened up my package of "Seal-All"
and put on a mechanic glove.
I spread some on the leaking seam and a corner hole that I tried to repair before.
I let it sit over night to dry.
Here is a shot of it this morning before gas was added:



 



 

Then I added gas.
I'll inspect it closely tomorrow morning and let you know if it is wet.
Jim Rogers.
PS. the rubber mechanic glove wasn't the best protection to my finger. Or it ripped.
Whatever you do, have fun doing it!
Woodmizer 1994 LT30HDG24 with 6' Bed Extension

Offline petefrom bearswamp

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Re: Plastic gas tank repair question
« Reply #15 on: May 18, 2018, 08:44:21 AM »
Repaired a 6 gal gas can 10 yrs ago using the soldering iron method, still using it.
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Offline Percy

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Re: Plastic gas tank repair question
« Reply #16 on: May 18, 2018, 09:30:44 AM »
I'll second the Seal All idea. What I have done in the past is sand the tank around the leak. Put seal all on, then a small piece of cloth, then more seal all. Like you are laying up fiberglass. Make sure cloth gets soaked with seall all. Did a fuel tank on a pickup this way while it still had fuel in it... Its not a forever fix but will last about a year....
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Offline mike_belben

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Re: Plastic gas tank repair question
« Reply #17 on: May 18, 2018, 01:29:09 PM »
When my gas cans leak its because the stupid epa filler necks have busted.  At which time i use em for target practice to show the kids what a load of birdshot will do to their brother or sister if they fool around with dads shotgun. 
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Offline Jim_Rogers

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Re: Plastic gas tank repair question
« Reply #18 on: May 18, 2018, 02:07:43 PM »
I said I'd let you know how I made out with the jug overnight.
As of this morning the area that used to be wet from gas is dry to the touch.
I think I got it but I don't know how long it will last, we shall see.



 

Jim Rogers
Whatever you do, have fun doing it!
Woodmizer 1994 LT30HDG24 with 6' Bed Extension

Offline LeeB

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Re: Plastic gas tank repair question
« Reply #19 on: May 19, 2018, 03:06:11 AM »
Just curious what the cost of a new tank is versus what you have spent for patching? Looks like a replacement tank for my mill is about $55 for a diesel tank. Have no idea what it is for a gasoline engine.
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