There are usually short pieces of flexible hose in the fuel line,
often buried behind the engine, I think they are there to
allow for engine movement, they perish with age and continuous
flexing and are a common source of fuel leakage/seepage.
It's not unknown for them to cause starting problems since
the fuel pump starts sucking air, and, at the relatively low
cranking revs, not enough fuel to replace that which has
drained away. If the engine starts it's higher speed then pulls
an adequate fuel supply.
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