The other thing to try, is pulling the earthing pin out of the carby, to disconnect the cutout switch.
These crude switches are notably trouble-prone, so it's best to eliminate that as a cause.
Cheers,
Gadge
"ODK Mods can explain it to you, but they can't understand it for you..."
"Crazy can be medicated, ignorance can be educated - but there is no cure for stupid..."
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