Vacuum Line
Figure 14. Schematic Showing Components of NG System.
Leakage Check/Testing
Every 500 hours or annually. With LPG tank valve
fully opened, engine not running, turn key switch ON.
Check all LPG system connections and lines for leaks
using soapy water. Any leakage must be corrected
before restarting engine. Have service performed
by an authorized Kohler Engine Service Dealer or
qualifi ed LPG personnel only.
Troubleshooting - Fuel Related
If engine problems are experienced that appear to be
fuel system related, check the following areas before
seeking service assistance.
• Make sure the LPG tank is properly fi lled (never
to more than 80 percent of total capacity). An air
space must be present in the tank to allow fuel to
expand.
• Make sure the air cleaner element is clean and all
air cleaner components are fastened securely.
• Check for loose, kinked, or cracked vacuum lines
causing regulator not to open.
Possible Cause
Problem
No Fuel
Will Not Start
Hard Starting
Stops Suddenly
Lacks Power
Operates Erratically
Knocks or Pings
Skips or Misfi res
Backfi res
Overheats
High Fuel Consumption
14
Carburetor
Fuel Delivery
Line
Dry Gas Regulator
Restricted
Improper
Dirt In
Fuel
Fuel Line
Fuel Filter
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To Natural
Gas Source
Lock-Off/Filter
(12 Volt DC)
• Check to make sure the fuel valve on LPG tank is
fully open.
• Check gauge on LPG tank to make sure pressure
is suffi cient to open the regulator.
If aft er checking the items listed above, the engine is
hard to start, runs roughly, or stalls at low idle speed,
qualifi ed fuel system servicing may be necessary.
Contact your nearest authorized Kohler Engine
Service Dealer for further assistance.
Troubleshooting
When troubles occur, be sure to check the simple
causes which at fi rst may seem too obvious to be
considered. For example, a starting problem could be
caused by an empty fuel tank. Some common causes
of engine troubles are listed in the following table.
Do not att empt to service or replace major engine
components, or any items that require special timing
or adjustment procedures. Have your Kohler Engine
Service Dealer do this work.
Dirty/
Dirty
Lock-off
Flywheel
Incorrect
Screen
Oil Level
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Faulty
Engine
Dirty Air
Spark
Overloaded
Cleaner
Plug
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Dirty/
Restricted
Regulator
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