Enrichment System; Electric Enrichener Valve - Mercury 40 Service Manual

Enrichment System

Electric Enrichener Valve

The enrichener system provides the engine with an
extra fuel charge for ease of cold engine starting. The
system consists of an electrically operated enrichen-
er valve which is connected by a hose to the intake
manifold.
Fuel is pressure fed to the valve from the float bowl
of the top carburetor via a hose. When the ignition
key is turned to the "on" position and pushed in (and
held in) current is sent to the valve causing it to open,
which allows fuel to pass thru. The fuel passes thru
a hose and is supplied to the engine via fitting located
in the intake manifold of the middle carburetor. When
the key (or choke button) is released, the valve will re-
turn to the closed position. The valve can be operated
manually by pressing and holding the button located
at the bottom of the valve.
ENRICHENER VALVE FUEL FLOW DIAGRAM
b
c
a
a - Carburetor
b - Enrichment Valve
c - Intake Manifold
3B-18 - FUEL SYSTEM 90-852572R1 JANUARY 1998