Kohler KG2204 Service page 48

To check the outlet pressure, connect a
manometer to the outlet port of the fuel pressure
regulator. See Figure 3-3.

NG = 1–3 inches of water pressure

LPG = 1–4 inches of water vacuum
Verify air intake system is intact. If the generator
has hoses, couplers or tubing, make sure all
connections are secure and there are no cracks.
Check the air filter for restrictions.
Checks
Fuel System Check
Visual and Physical Checks
Figure 3-4 Fuel System Basic Troubleshooting
48 Fuel System Troubleshooting
Action
 Locate the correct symptom table.
 Check the items indicated under that symptom.
 Operate the engine under the conditions the symptom occurs. Verify HEGO switching
between lean and rich (cycling of voltage).
Note: Normal HEGO switching indicates the fuel system is in closed loop and operating
correctly at that time.
 Take a data snapshot using Spectrum under the condition that the symptom occurs to
review at a later time.
 Check that the ECM ground connection is clean, tight, and in its proper location.
 Check the vacuum hoses for splits, kinks and proper connections.
 Check thoroughly for any type of leak or restriction.
 Check for air leaks at all the mounting areas of the intake manifold sealing surfaces.
 Check for proper installation and leakage around the regulator, mixer and throttle body.
 Check the ignition leads for the following conditions:
o Cracking
o Hardening
o Proper routing
o Carbon tracking
 Check the wiring for the following items: proper connections, pinches, or cuts.
1
1. Inlet port
2. Outlet port
Figure 3-3 Fuel Pressure Regulator
2
TP-6903 5/16a