Huh...We have a big diesel generator at work with copper fuel lines. It's 1950's vintage though.

49 Chevy 3600
65 Chevy K10
66 International 1300 dually 4x4
46 Ford 1/2 ton
76 Tucker Sno-Cat 1642
96 Dodge 3500 Cummins dually flatbed x-cab 4x4
06 Jeep Wrangler LJ rock crawler
If you can't fix it with a hammer, it's an electrical problem