Kohler SFGLD480 Operation & Maintenance Manual page 313

SYMPTOM
Engine oscillates
PRODUCT INFORMATION
IO-G-T-00-001e
GAS ENGINES TROUBLESHOOTING
PROBABLE CAUSE
Engines with electronic carburetion and
electrical throttle:
1. Spees PID Misadjusted
2. Low voltage in throttle actuator
3. Tool lean mixture
4. Program prolem
5. NOx sensor or lambda sensor failure
Engines with electronic carburetion and
electric throttle:
Speed PID misadjusted
1. Low voltage at throttle
2. Too lean mixture
3. Problem with program
Clogged air filters
Ignition fails
1. High voltage wires
2. Coils
3. Damaged spark plugs or inadequate gap
4. Defective ignition module
Low or fluctuating gas pressure
Dirty air cooler
Turbochargers in bad condition
INDEX
B
REMEDY
1. Adjust speed PID
2. Change batteries or charger
3. Adjust A/F ratio, opening the screw
4. Check program
5. Check sensor and wire
You need to have good knowledge of the
control system in order to solve program-
related issues
1. Adjust speed PID
2. Change batteries or charger
3. Readjust carburettor mixture valve
4. Check program
Change filters
1. Change faulty wires
2. Change defective coils
3. Regap or change spark plugs
Change ignition module
Change regulator and, if problem is due to
gas supply, contact your supplier
Clean cooler
Change turbochargers
6.1.10
DATE
Dep. 2
February 2016
O&M_2.002211.810_A_10_2016
10/10