4.10
CARBURETION
provided in the head of the jet needle. The chart at right shows
the variation of fuel flow based on the height of the “E" ring.
NEEDLE JET
The needle jet works in conjunction with the jet needle to
regulate fuel flow rate. An air bleed opening in the side of the
needle jet brings in air measured by the air jet. This air
initiates the mixing and atomizing process inside the needle
jet. Mixing is augmented by a projection at the needle jet
outlet, called the primary choke. The letter number code
stamped on the jet indicates jet inside diameter.
THROTTLE OPENING VS FUEL FLOW
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