Kohler Command CV730 User Manual download pdf (Page 24)

3.1

Section 3

Troubleshooting

Section 3

Troubleshooting

Troubleshooting Guide

When troubles occur, be sure to check the simple

causes which, at first, may seem too obvious to be

considered. For example, a starting problem could be

caused by an empty fuel tank.

Some general common causes of engine troubles are

listed below. Use these to locate the causing factors.

Refer to the specific section(s) within this service

manual for more detailed information.

Engine Cranks But Will Not Start

1. Empty fuel tank.

2. Fuel shut-off valve closed.

3. Poor fuel, dirt or water in the fuel system.

4. Clogged fuel line.

5. Spark plug lead(s) disconnected.

6. Key switch or kill switch in “off” position.

7. Faulty spark plugs.

8. Faulty ignition module(s).

9. SMART-SPARK

™

malfunction (applicable

models).

10. Carburetor solenoid malfunction.

11. Diode in wiring harness failed in open circuit

mode.

12. Vacuum fuel pump malfunction, or oil in vacuum

hose.

13. Vacuum hose to fuel pump leaking/cracked.

14. Battery connected backwards.

15. Safety interlock system engaged.

Engine Starts But Does Not Keep Running

1. Restricted fuel tank cap vent.

2. Poor fuel, dirt or water in the fuel system.

3. Faulty or misadjusted choke or throttle controls.

4. Loose wires or connections that short the kill

terminal of ignition module to ground.

5. Faulty cylinder head gasket.

6. Faulty carburetor.

7. Vacuum fuel pump malfunction, or oil in vacuum

hose.

8. Leaking/cracked vacuum hose to fuel pump.

9. Intake system leak.

10. Diode in wiring harness failed in open circuit

mode.

Engine Starts Hard

1. PTO drive is engaged.

2. Dirt or water in the fuel system.

3. Clogged fuel line.

4. Loose or faulty wires or connections.

5. Faulty or misadjusted choke or throttle controls.

6. Faulty spark plugs.

7. Low compression.

8. Faulty ACR mechanism (equipped models).

9. Weak spark.

10. Fuel pump malfunction causing lack of fuel.

11. Engine overheated-cooling/air circulation

restricted.

12. Quality of fuel.

13. Flywheel key sheared.

14. Intake system leak.

Engine Will Not Crank

1. PTO drive is engaged.

2. Battery is discharged.

3. Safety interlock switch is engaged.

4. Loose or faulty wires or connections.

5. Faulty key switch or ignition switch.

6. Faulty electric starter or solenoid.

7. Seized internal engine components.

Engine Runs But Misses

1. Dirt or water in the fuel system.

2. Spark plug lead disconnected.

3. Poor quality of fuel.

4. Faulty spark plug(s).

5. Loose wires or connections that intermittently

ground the ignition kill circuit.

6. Engine overheated.

7. Faulty ignition module or incorrect air gap.

8. Carburetor adjusted incorrectly.

9. SMART-SPARK

™

malfunction (applicable

models).

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Kohler Command CV730 User Manual Page 24

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