JB Weld

[CH(upstate,NY)]

Is it gasoline proof? Tanked my genny carb Friday, blew it out and reassembled it. Genny ran a little rough until I shut the fuel off than ran smooth until it ran out. Took the carb apart and found one of the ears that the pin that holds the float broke. Put a little JB to hold the pin and let it sit in case I needed it tonight.

So it it gas proof? If not, any recommendations?
 

[JB weld]

I think it could work but leave it for 24 hours to dry.
 

[504]

You really never know, if you got it clean and let it sit for 24 it may work fine. There is a product made to use in gas too.
 

[Dean]

Gasoline tolerant epoxies are available. I've used such to repair worn float pin bores in Ford/Holley carburetors.

Dean
 

[JMS./MN]

I used JB weld and fiberglas stripping to patch a Ford p/u tank over 5 years ago- corroded around the mounting straps. Warmed the JB tubes in hot water- mixed easier. Was a second tank, so let it dry a couple weeks. Still holds now.
 

[redtom]

won't last. Bought a tractor once, ran good for a while then flooded. Took carb apart, seller had glued the brass float to the arm with JB, gas "melted" the JB.
 

[Ultradog MN]

If I was the dictator of all the world the first thing I would do is outlaw JB Weld.
Then I would outlaw women voting.
I used JB on a carb bowl once and it did not last more than a week or so and it sluffed off.
I have also cleaned and soldered more than one fuel tank that someone used JB on.
I find little use for the stuff.
 

[t.r.k.]

3 years ago the tank in my '69 1 ton started leaking. Pretty big deal since its in the back of the cab. So I replaced the tank.

On the bottom of the old tank was an old JB-weld patch. I bought the truck in '93 so it was on there then. . . 18 or 19 years. But I wonder if it was really the ethanol in the gas that loosened it up.

Your post reminds me of the Auto Mechanics shop back in the 80's. I broke a float lug off on a carb. in a volkswagen rabbit. My teacher told me to take it and show it to the instructor in the welding shop.
The old guy-probably 60+ years old- builds up the area with something he called 'sil-fos' or some such, cuts it back to shape with a Dremel Tool and drills a new hole for the float pin.

It worked fine.
 

[G1355]

I had luck but I let my tank sit empty for a week a year later it still holds
 

[M-MAN]

The old slow drying jb weld is gas proof when cured properly. Had an old mac chainsaw with a fuel tank busted half into that I put back together with it. Ran that saw several more years & it never let go. Try to use it like glue & it won't work.
 

[Jason S.]

In general regular JB Weld will hold for a while but it usually turns loose, but go get a pack of JB Marine Epoxy it is much more resistant to fuel.
 

[JRSutton]

I had a carb float crack off once - tried jbwelding it back in place as it was my only real choice before rain got on the hay that was down.

Lasted a few months, but eventually got all rubbery and fell apart.

Somebody said it has to cure properly to work - and they may be right. I certainly didn't let my bandaid job cure properly - had to get it back up and running quickly.
 

[Jim in LA]

My Dad patched the gas tank on our 8n with JB weld. He used a piece of pillow case saturated with JB weld that had been thinned with paint thinner and it is still holding. I think we used about four tubes. The patch was about 6x8 inches. We first tried using gas tank epoxy but the patch just fell off after curing. A neighbor told him to use the JB weld and paint thinner and it worked. I used JB weld to seal a cracked brass emulsion tube (i think that's the right term) on my Harley carburetor years ago and it held up until last year when I disassembled the carburetor, I discovered the JB weld had started to soften. One of these days I will get around to patching it again so I can go riding.
 

[Mark6005]

Only used it once 18-20 years ago on a couple leaks on my 8n radiator. Still have the 8n and no leaks. Hope I didn"t jinx it
 

[dave2]

I think so....... Prolly the main problem with the stuff (that gives it the bad name) is the users that needed a "quick fix" and done the preperation "quick" also.....