OPERATION
16 Operation TP-6901 3/16a
Fuel Pressure Regulator
Figure4-2
The fuel pressure regulator modulates the pressure of
the LPG/NG vapor to the air-fuel mixer.
The fuel pressure regulator is not adjustable. However,
a selector at the base of the regulator is rotated when
switching from NG to LPG and back. See “NG to LPG
Conversion” on page 20 for instructions.
Fuel Control Valve
z
Figure4-3
The fuel control valve is an ECM-controlled vacuum
switch that adjusts the fuel pressure delivered from the
fuel pressure regulator to the air-fuel mixer.
Air-Fuel Mixer
Figure4-4
The air-fuel mixer is mounted in the air stream ahead of
the throttle. It is a nonadjustable metering device that
combines LPG/NG vapor with intake air for
combustion.
fThrottle Body
Avoid the possibility of component damage. The
air-fuel mixer is an emission control device.
Components inside the mixer are specifically
calibrated to meet the engine’s emission
requirements and should never be disassembled
or rebuilt. If the mixer fails to function correctly,
contact your KOHLER authorized distributor or
dealer.
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