Posted by Steve@Advance on May 12, 2016 at 20:34:52 from (107.203.134.67):
In Reply to: Bad Gas Talk posted by David G on May 12, 2016 at 19:50:17:
Interesting effect of copper!
Back in the late 70's I owned a 1946 model 27' Elco cabin cruiser. It had factory copper fuel tanks.
When I bought it, it had been sitting in wet storage, not run in about 8 to 10 years! It reeked of stale gasoline. The tanks had a bolt on cover. They were about half full of green liquid with about 2 inches of semi-solid goo in the bottom. I had to cut the floor to get them out, had them hot vatted, came back looking like new.
Put them back in, cleaned the fuel system, got it running. But could not get rid of the smell! Also could not make it run right, flooding, needle sticking, inconsistent idle mixture. Then it lost compression on a cylinder. Pulled the head, stuck exhaust valve. But what was strange, the combustion chamber, valve heads, top of pistons looked like they had been painted with gloss black enamel paint! Thick, sticky, nasty! Ended up pulling all the valves, cleaning the stems and guides, cleaned everything up, back together.
I pumped out the tanks, got rid of them, abandoned the copper fuel lines. Installed a single aluminum tank with an outboard fuel line. That was the end of the fuel problems!
So, something definitely was up with the copper tanks and lines! Always suspected the copper was reacting with the gasoline, this article backs my theory! BTW, this was long before ethanol was added, just good old leaded gas!
Another strange thing, this boat was built by the Electric Boat Company, Yacht Division. These were not rookie builders, they formerly built submarines for the military in WW2! How would they have made such a mistake? All I can conclude is copper was the best corrosion resistant material they had, maybe it originally had some type coating.
To keep this tractor related, I don't recall ever seeing a factory copper fuel line!
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