Old rusty tank questions

[tibor]

Both of my tanks for the old Neptunes are pretty rusty. I tried the vinegar, then baking soda thing, it really did not do much. I am thinking about sealing them.

I removed the tank drain tubes and first of all, I cannot figure out what size / thread they are. It is almost 7/16, it is almost 10mm but not quite.

Both had these little copper filter things on top. One has so much rust on the inside, I tried to clean it and basically broke it. So I took it off … or at least I thought I did, then I noticed that there is a lip on the inside, so I must have only removed the copper “fabric” and the however it is stuck in the tube part must be still attached. How do I get that out of there, drill it out? I add a picture of the two tubes.

Also, these copper things seem pretty useless, how do people add any sort of fuel filter to these old (1940s) motors?

Thanks for the answers in advance!

[David Bartlett]

The thread is most likely a 1/8 pipe thread(tapered), so don’t try to put something other than a pipe plug in there. The brass screen was soldered into the end of that fitting, so you could heat it to remove or drill out. You can get the screen to replace it from McMaster Carr or others. It is 100 mesh screen, and you can fabricate your own filter.

David Bartlett
Pine Tree Boating Club Chapter

"I don't fully understand everything I know!"

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tibor

[crosbyman]

as to rust .. there are some videos on utube  on how to use  electrolysis to remove it …. maybe that could work for you .    after…you then seal the tank with a sealant product like RED KOTE  or POR 15

POR-15 Fuel Tank Sealer – 8 oz – Stops Rust, Corrosion, & Leaks | Seals Pinholes & Seams | Non-porous, Flexible Film | Resistant To All Fuels, Alcohols, & Additives : Amazon.ca: Automotive

Joining AOMCI has priviledges 🙂

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tibor

[tibor]

David, thank you for the pipe thread “idea”. I played “NPT” lego at the local hardware store today for quite a while and found the fittings I needed. The tanks are now plugged and they are full of Evaporust.

One of the motors has this beautiful copper / bronze piping for fuel line. It looks like it’s 1/8, where can one get that and how does one bend that without kinking it?

As I am searching is it the same as the refrigeration tubing?

 

[Tubs]

You can speed up the Evaporust if you can warm it up some. If it has gotten warm where you are, setting the tanks out in the sun will help.

A "Boathouse Repair" is one that done without having tools or the skills to do it properly.

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Sam M.

[tibor]

I am in New Hampshire and it has been freezing. Heat is still on and it’s the Memorial Day weekend 🙁

But at least the sun seems to be out today.

[crosbyman]

Same here in Montreal  currently 48.2F   coldest low since the 1950’s  🙁    Tuesday should hit 77 F  🙂     nuts….

Joining AOMCI has priviledges 🙂

[David Bartlett]

A good plumbing supply house may have the copper tube. If not you can also order that from McMaster Carr company. They have everything!

David Bartlett
Pine Tree Boating Club Chapter

"I don't fully understand everything I know!"

[tibor]

Evaporust is crazy good, it basically got rid of all or almost all the rust from the tanks in 24 hours. I cannot believe it worked this good.

Thanks for the recommendation!

[seakaye12]

tibor wrote:

Evaporust is crazy good, it basically got rid of all or almost all the rust from the tanks in 24 hours. I cannot believe it worked this good.

Thanks for the recommendation!

It’s expensive though.  A gallon of that stuff costs more than most of my motors did LOL….

[Author]

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