86 TRX350 Fuel Tank Borescope - Page 2 - Honda ATV Forum
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post #11 of 31 (permalink) Old 11-03-2018, 07:52 AM
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I bring mine to the radiator shop , he soaks it in the tank over night , cut a small access hole in the bottom of the tank to better get it flushed out , he welds up the hole , and coats it with some thin red stuff , it is $90 for that job , well worth it ---it is $40+ for the Kreeme stuff and I have seen it come off
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post #12 of 31 (permalink) Old 11-03-2018, 07:56 AM Thread Starter
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I had an old beer line cleaning brush I laid aside for reaming the fuel pipes now can’t find it grrrr

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post #13 of 31 (permalink) Old 11-03-2018, 08:02 AM
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Plastic tanks like on my 450's are better in one way , they don't rust but worst in another as the threaded nuts molded into the plastic spin and ruin the tank ------- I think when they went to burning corn in the fuel , it caused a lot of problems ---now they are burning chicken pee in the diesel
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post #14 of 31 (permalink) Old 11-04-2018, 07:12 AM Thread Starter
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Usually I clear the fuel lines before I acid wash the tank but couldn’t find my old 3/16 inch beer line brush. Unfortunately the reserve line had a very tight clog in it–couldn’t clear it.

Every time I ran a pipe cleaner into it I came up dirty with rust particles. tried a piece of copper wire–everything I had in the shop. No good. took a break and fixed a DWV plumbing leak and remembered my line cleaner–a long piece of flexible cable.

I took an old binding choke cable; cut it off to the length I thot needed. Poured cutting oil into the pipe. Mounted it to my drill. Took it slow as to not bind the cable–after 3 minutes of slow boring, got thru the clog!

So there’s another tank tool for you old TRX350 Outlaws; don’t press too hard or you’ll go thru the screens!
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post #15 of 31 (permalink) Old 11-04-2018, 09:20 PM Thread Starter
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Ok I ran a second acid wash with 2 gallons of vinegar and all the BBs, but for half the time (1 hour). I recycled the first batch of material, mixing in new.

I think the greater volume resulted in longer contact time with the acid and more physical contact with the BBs on interior surfaces.

This tank looks great on the inside; when I get ready to use it will rinse out any calcium hydroxide residue with a little fuel
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post #16 of 31 (permalink) Old 11-06-2018, 01:29 PM
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I got a gallon of cleaning vinegar (6%) and a box of 6000 copperhead BBs: put in the rusty tank.
Taped the petcock holes and filler opening with aluminum tape; bubble wrapped tank and taped up in a cardboard box. Stuffed fed end out in my cement mixer in an off-axis orientation so the BBs would roll from front to back of the tank. let it ride for and hour and switched to end out for another hour.
Drained tank and removed BBs with a long handled magnet.
Mixed a gallon solution with 5 tbls of spa pH calcium hydroxide powder. Rinsed tank with that solution and poured out.
Dried tank with hair drier.
No flash rust.
I need to get some long pipe cleaners to ream out the fuel pipes. I would like to do it one more time but I’m pretty happy with the results
I'll have to try that calcium hydroxide out. I have a couple of 300 tanks and a couple of 350D tanks that need a good cleaning!
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post #17 of 31 (permalink) Old 12-03-2018, 09:45 AM
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Sooo, yesterday I finally got some wrench time in and discovered that a previously clean 300 tank is now full of rust. A friend of mine bought a new tank that was clean when he got it, but if I had to guess the seller had just done a vinegar bath so now it's full of light scale again. I have vinegar on hand. Is this the stuff I need to use after the vinegar, and if so, do I add 1 teaspoon per gallon or do I need to mix it stronger?

https://www.homesciencetools.com/pro...iABEgJsN_D_BwE
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post #18 of 31 (permalink) Old 12-03-2018, 10:47 AM Thread Starter
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Hi Jeep
Yeah that material should work I would use 2-6 tablespoons (3 teaspoon/tablespoon) per gal. the reason I make it extra strong is that some of the limewater will be neutralized by residual acid (vinegar) left in the tank. Slightly stronger solution in this case is better than slightly weaker.

Have a hair dryer ready. After the vinegar rinse I empty the tank through the drain or petcock hole. try to get all the BBs out with a magnet. Rinse with that high pH solution, empty, then start drying. Roll that tank occasionally to get remaining BBs and water moving.

If you use a heat gun beware that you don’t get it so hot you blister the paint

When mixing acids and bases always add the pure mix to water, rather than adding water to the pure mix. The chemistry rule is “Always Add Acid” TO water.

Here’s my tank now
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post #19 of 31 (permalink) Old 12-13-2018, 08:45 AM
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Hi Jeep
Yeah that material should work I would use 2-6 tablespoons (3 teaspoon/tablespoon) per gal. the reason I make it extra strong is that some of the limewater will be neutralized by residual acid (vinegar) left in the tank. Slightly stronger solution in this case is better than slightly weaker.

Have a hair dryer ready. After the vinegar rinse I empty the tank through the drain or petcock hole. try to get all the BBs out with a magnet. Rinse with that high pH solution, empty, then start drying. Roll that tank occasionally to get remaining BBs and water moving.

If you use a heat gun beware that you don’t get it so hot you blister the paint

When mixing acids and bases always add the pure mix to water, rather than adding water to the pure mix. The chemistry rule is “Always Add Acid” TO water.

Here’s my tank now
Looks like the inside of the tank is clean now. Gotta dump the vinegar, and then based on what you said here I should flush the tank a big, then fill it with clean water and add the calcium hydroxide, slosh it around a bit? Should I let it sit at all with that solution in it, or just slosh it around for 30-45 seconds and then dump it and hit it with the hairdryer?

Just wondering how long it will take the solution to neutralize the vinegar....
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post #20 of 31 (permalink) Old 12-13-2018, 11:49 AM Thread Starter
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Quote:
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Quote:
Originally Posted by Goober View Post
Hi Jeep
Yeah that material should work I would use 2-6 tablespoons (3 teaspoon/tablespoon) per gal. the reason I make it extra strong is that some of the limewater will be neutralized by residual acid (vinegar) left in the tank. Slightly stronger solution in this case is better than slightly weaker.

Have a hair dryer ready. After the vinegar rinse I empty the tank through the drain or petcock hole. try to get all the BBs out with a magnet. Rinse with that high pH solution, empty, then start drying. Roll that tank occasionally to get remaining BBs and water moving.

If you use a heat gun beware that you don’t get it so hot you blister the paint

When mixing acids and bases always add the pure mix to water, rather than adding water to the pure mix. The chemistry rule is “Always Add Acid” TO water.

Here’s my tank now
Looks like the inside of the tank is clean now. Gotta dump the vinegar, and then based on what you said here I should flush the tank a big, then fill it with clean water and add the calcium hydroxide, slosh it around a bit? Should I let it sit at all with that solution in it, or just slosh it around for 30-45 seconds and then dump it and hit it with the hairdryer?

Just wondering how long it will take the solution to neutralize the vinegar....
Yup no need for a water rinse just vinegar, remove BBs, high pH solution and slosh it for a minute then dump out and dry
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