The most serious was a leak in the
fuel return line from the pressure regulator to my header tank which is
a low pressure line. In any case, the fuel was bubbling out between
the stainless steel braid about 2 1/2" above the fitting and dropping
straight down to the cowl (if had been on). Line had been on the
engine for 340 running hours and not in a high heat area.
Should have used clear lines. They you can see and fell when they go
bad :)