5.12
Section 5
Fuel System and Governor
Troubleshooting - LPG Systems
If engine troubles are experienced that appear to be
caused by the carburetor, check the following areas
before adjusting the carburetor.
• Make sure the air cleaner element is clean and all
air cleaner components are fastened securely.
This is especially critical on propane-fueled
engines.
• Check for a loose or kinked vacuum line, causing
regulator not to open.
• Check to make sure the fuel valve on the LPG
tank is fully opened.
• Check gauge on LPG tank to make sure there is
sufficient fuel present.
If, after checking the items listed above, adjust or
service the carburetor as follows.
Adjust Carburetor
1. With the engine stopped, reset the main fuel
setting by closing the adjusting screw until it
bottoms then turn it 2 1/4 to 2 1/2 turns open
(see Figure 5-16).*
Figure 5-16. LPG Main Fuel Setting.*
*NOTE: Engines equipped with Kohler Emission
Sentry™ controls have a fixed main jet
carburetor.
Figure 5-17. Main Components of Kohler Emission Sentry™ System.
Vacuum Line
Main Fuel Set
2 1/4 to 2-1/2
Turns Open
Adjustable Type Only
Fuel Inlet from
Regulators
3 Way Catalytic
Muffler (Not Shown)
Oxygen Sensor
LPG Carburetor
Shown with
Self-Relieving
Choke
Coupling
Adjustable
Load Screw
Electronic
Control Unit
DC Stepper Motor
Fuel Metering
Valve Body
To Unit
Wiring Harness
(12 Volt Source)
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