Kohler K9J Service Manual page 50

LOCK-OFF
ADJUSTMENT~
~~
I~
I ___ _
Figure 6-35. Models S and SO Secondary
Regulators.
NOTE: The lock off adjusting screw may be used
to adjust fuel flow while the engine is idling. Never
adjust at any speed above idle.
5. If the regulator being adjusted is a Model S or
SD, depress the primer button for an instant.
This will allow air to flow through the regulator.
LOCK-OFF
ADJUSTMENT
DIAPHRAGM SPRING
FUEL INLET
6. Check that air flow stops when the primer is
released.
7. If air flow does not stop completely, loosen the
adjustment screw lock nut and turn the adjust-
ment screw in until air flow stops, then one
more full turn.
8. Repeat steps 5 through 7 until air flow stops
every time.
9. Tighten adjustment screw lock nut.
Primary Regulator
The primary regulator provides initial control of the
fuel under pressure as it comes from the fuel sup-
ply tank. The inlet pressure for primary regulators
should never exceed 250 psi. The primary regula-
tor is adjusted for outlet pressure of approximately
6 ounces per square inch (11" W.C.). If the regu-
lator does not function properly, replace it or have
it serviced by an authorized gas equipment shop.
Never attempt to service a faulty primary regulator.
Upon demand for fuel, pressure drops on the out-
let side of the regulator diaphragm. The gas inlet
valve then begins to open, allowing fuel to pass
through the regulator to the secondary regulator.
As the need for more fuel increases, the fuel inlet
valve opens further, allowing more fuel to pass.
Refer to Figure 6-37.
Pressure may be adjusted by removing the bonnet
cap and turning the spring tension adjustment with
a large screwdriver. Turning clockwise increases
the pressure; turning counterclockwise decreases
it.
VENT
Figure 6-36. Model KN Secondary Regulator.
6.24