Fuelcock - Suzuki GS850G Service Manual

FUEL COCK
This fuel cock is provided three position, ON
RESand PRI.
When the engine is not running and the lever i s in
the
ON
or RES position, the fuel valve is kept in
the closed position by applying pressure utilizing
a spring so
that no fuel will flow to the carburetors.
When the engine
is
engaged, a negative pressure is
generated in the diaphragm chamber "C" through
the vacuum (negative pressure)
pipe
which is
connected to the carburetors, and builds up a
negative pressure which
i s
stronger than
the
spring
pressure so that the disphragm
is forced
to open
the fuel valve and thus allow the fuel to flow to the
carburetors.
"'ON"
@
Fuel valve
@
O-ring
@
Diaphragm
Spring
@
One
way
valve
@
Vaccurn Fuel flow
I
I
"RES"
When the lever is set to PR I position, the protrusion
located on the lever end pushes back the fuel
valve mechanically against the spring force and it
allows fuel to flow
t o
the carburetors directly,
whether the engine
is
running
or
not through the
RES side fuel fiitre and fuel valve clearanoe,