My guess is that the fuel level in the bowl is too high and therefore coming
out of the vents. 3/16" as I recall is about half of what it should be. If
my memory serves me correctly a .440" (11mm) diameter rod (drill bit) should
fit between the cover surface and the float control lever. My 3A is fitted
with a shield that prevents the fuel from fouling the paint when it comes out
of the vents. My friends 3A has fouled paint in his nicely detailed bay for
the same reason (no shield). So it looks like this happens in the best of
times with the control level properly adjusted.
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