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I am not a fan of new gas tanks because they balloon up.I was thinking of cutting out the bottom of this, cleaning out the rust, welding it back together, then epoxy coating the inside of the tank.Has anyone done this? The metal is pretty thin.
1940-1950 (?) Wilson Hornet
Reply:I guess you missed the tirade over the guy that cut the bottom out of his cycle tank to clean it... or you didn't and you want to watch the show... Can you weld thin metal? With enough practice, absolutely. Can you weld thin rusty metal? Yes, but with more practice. Can you weld thin rusty metal so that it will hold gas without leaking? I guess that depends on your skill level as well. Can you weld thin rusty metal that's been soaking in gasoline for 40 yrs? Dunno, but make sure you get it on film for us if you try...If you can do a reasonably good job of cleaning out the tank without cutting it open (should be lots of You tubes on the processes involved), this is the only product I would recommend for re-coating it.... https://por15.com/products/fuel-tank-sealerLast edited by whtbaron; 6 Days Ago at 10:17 PM.The harder you fall, the higher you bounce...250 amp Miller DialArc AC/DC StickF-225 amp Forney AC Stick230 amp Sears AC StickLincoln 180C MIGVictor Medalist 350 O/ACut 50 PlasmaLes
Reply:Thanks! Got it!1940-1950 (?) Wilson Hornet
Reply:I've had a plastic fuel tank in the back with my outboard for about 20 yrs... it stays inside when not in use, and yes, it will expand slightly in the sun if you don't leave the bleeder open, but I've never had any big problems with it.The harder you fall, the higher you bounce...250 amp Miller DialArc AC/DC StickF-225 amp Forney AC Stick230 amp Sears AC StickLincoln 180C MIGVictor Medalist 350 O/ACut 50 PlasmaLes
Reply:Don't cut it open. Get a bunch of nuts, bolts, nails, gravel, whatever and put those in the tank with a couple gallons of water and some dish soap. To agitate that, you can ratchet strap the tank to a wheel on a tractor or lawnmower and drive around. After that, wash the can out with a garden hose and leak test it. I recommend taking a pick or a screwdriver and inspecting any pitted areas. If you have any leaks or bad pitting, sand down that area and braze it. I use Lincoln Electric flux coated brazing rods. Probably best if you get small ones. 3/32"? If you don't have an oxy-fuel torch, you CAN braze steel gas tanks with a MAPP torch, it just takes longer to get everything hot enough for the braze to wet out. I've done this to multiple gas tanks for small engines with good success. Sent from my Lincoln Buzzbox using Tapatalk
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Originally Posted by 52 Ford
Don't cut it open. Get a bunch of nuts, bolts, nails, gravel, whatever and put those in the tank with a couple gallons of water and some dish soap. To agitate that, you can ratchet strap the tank to a wheel on a tractor or lawnmower and drive around. After that, wash the can out with a garden hose and leak test it. I recommend taking a pick or a screwdriver and inspecting any pitted areas. If you have any leaks or bad pitting, sand down that area and braze it. I use Lincoln Electric flux coated brazing rods. Probably best if you get small ones. 3/32"? If you don't have an oxy-fuel torch, you CAN braze steel gas tanks with a MAPP torch, it just takes longer to get everything hot enough for the braze to wet out. I've done this to multiple gas tanks for small engines with good success. Sent from my Lincoln Buzzbox using Tapatalk
Reply:OP, Just buy a plastic fuel tank and an aftermarket vented cap. There are plenty of the vented caps available. Even if you had to modify one of the caps with the stem and gauge, that is still easier and faster than fooling around trying to fix an old metal tank.Millermatic 252 MIGMiller Dynasty 200DX TIGMiller Spectrum 625 PlasmaAltas 12x36 Metal LatheBridgeport Milling Machinewww.psacustomcreations.com
Reply:I would just Red-Kote it. That's what I did after trying to fill fifty bajillion pinholes with bronze, and failing. I can't even imagine what a nightmare it would be to try to weld.
Reply:Thanks. I had not thought of the nuts and bots idea.
Originally Posted by 52 Ford
If you have any leaks or bad pitting, sand down that area and braze it.
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Originally Posted by Oldiron2
Another trick you can use if you think the bottom plate will be too corroded to braze, but the sides and top are pretty good, is to clean the outside of the bottom to bare metal, preferably by sandblasting, or coarse-grit sanding...
Reply:Take it to your local radiator guy. They fix leaky fuel tanks too. They clean them, braze up the leaks and coat the inside for a pretty reasonable price.
Reply:Buy a new tank.. This isnt worth it.www.urkafarms.com
Reply:
Originally Posted by Sberry
Buy a new tank.. This isnt worth it.
Reply:I would do any heating of gasoline fuel tank. This can be very exposes . Have read paper of lot welders trying to weld gas tanks. Most was very unlucky and a short list of lucky ones was in wheel chair for life. Like StandarDyne Red-Kote safer Dave
Originally Posted by ericsarratt
I am not a fan of new gas tanks because they balloon up.I was thinking of cutting out the bottom of this, cleaning out the rust, welding it back together, then epoxy coating the inside of the tank.Has anyone done this? The metal is pretty thin.
Reply:Maybe to clean the tank you could put some pea gravel in it and tumble it in a cement mixer with some cushions around it to preserve the exterior finish. For safety fill it with argon before you seal it up for tumbling and remove anything that might get damaged and plug the holes.---Meltedmetal
Reply:Not being full holes changes it a little. Coating becomes a good optionwww.urkafarms.com
Reply:Any thoughts on soaking it with vinegar and neutralizing before sandblasting or tumbling? I'm wondering how deep the pits are though, blasting and tumbling might open up a bunch of new pinholes. Pretty sure if you add up all the materials( not even thinking about labor) you'll be half way to the new plastic tank anyway.The harder you fall, the higher you bounce...250 amp Miller DialArc AC/DC StickF-225 amp Forney AC Stick230 amp Sears AC StickLincoln 180C MIGVictor Medalist 350 O/ACut 50 PlasmaLes
Reply:Metal tanks are a lot longer-lasting than plastic, not least because UV doesn't transform metal tanks into plastic chaff. Fuel also degrades a lot faster in plastic tanks, again because light goes through them. If you go with the Red-Kote, follow the instructions to the letter. Basically, when I did mine, I put a bunch of chains, nails, gravel, sand, etc., into the tank with hot soapy water and shook it around for about 20 minutes. Then rinse rinse rinse rinse rinse with water. Then put in some acetone, shake it around, then shake it out (the residual water dissolves in the acetone, helping to "dry out" the tank faster.) Then add more acetone and do it again. Then more acetone and do it again. Then let it dry in the sun for a couple of days. Then use the Red-Kote.I would not use vinegar or acid, since that can get into the pits and voids in the metal and continue to corrode it long after the job is done. You want to remove the rust scale, but a little bit of surface rust inside the tank is not a big deal -- if anything, it gives the Red-Kote some "tooth" to adhere better. When I did mine, I thinned the Red-Kote a little bit. A couple of thin coats is better than too-thick of a coat, because if the coating of Red-Kote is too thick, it will never fully cure and may contaminate your fuel. It's good stuff and seals pinholes well. No trouble since I did mine several years ago.
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Originally Posted by ericsarratt
Actually all the metal of the can is good. It is the rust that I am trying to get rid of on the inside/What got me onto the bottom cutting idea was the epoxy technical specs. They say clean bare metal before coating. And, I don't have a sandblaster to clean the inside.I do hear everyone on not cutting the bottom.I'm now leaning in the direction of setting this project aside and buying a plastic tank for now. And then I'll work on it again when I have a sandblaster.
Reply:At 20$ 8 Oz, the repair, it's something I could do and would if I had to but I consider cost and work anymore. Left over industrial Imron poured in the bottom worked well and even cost less at the time.www.urkafarms.com
Reply:"Can you weld thin rusty metal?"I'll disagree to the point most thin rusty metal is oxidized all the way through. It can't be welded if rust passes all the way through. I've spent hundreds of hours trying to learn the extent of rust to weld rusty metal. Typically when I burn it back far enough to have adequate thickness left to weld I have a big hole. Rust can NOT be welded.An optimist is usually wrong, and when the unexpected happens is unprepared. A pessimist is usually right, when wrong, is delighted, and well prepared.
Reply:Copying and pasting from another thread... I MEANT to post here. I HAVE brazed with a MAP-Pro torch and 3/32" flux coated bronze rods. I'm fairly certain I was running propane instead of MAP-Pro, too. This torch: https://www.acehardware.com/de...&ut...ganic-shoppingThese rods: https://www.lowes.com/pd/Linco...ing...?user=shoppingFuel tank was for a Wheel Horse with an H60 Tecumseh. The tank was rusted all the way through. I did a similar repair (but with oxy-propane) on the fuel tank on a GX240 that was very rusty. Had a lot of pin holes in it. That was years ago... still works fine. Sent from my Lincoln Buzzbox using TapatalkLast edited by 52 Ford; 5 Days Ago at 09:35 PM.
Reply:If you want to cut the tank, fill it full of water and use a wafer disk. OR, purge it with constant argon or nitrogen before and while you cut it. Gasoline vapors are the danger to worry about..
Reply:Is the rust seem to be in or near the bottom only ? Dump a gallon or two of white vinegar in the tank just above the rust. Let it sit for a few days, and dump out. Repeat if needed.I soak old rusted horseshoes and metal in vinegar all the time, it works great ! For disposal, dump on weeds and it kills them.
Reply:I'd find a steel or alloy tank or make one if you're going to that much trouble. Carbon steel is used because it's cheap. The good plastic tanks are made like race car fuel cells (or you can use a race car fuel cell).Last edited by farmall; 4 Days Ago at 07:33 PM. |
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发表于 2022-9-16 15:52:12