3.1
3
Section 3
Troubleshooting
Troubleshooting Guide
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 general common causes of engine troubles are
listed below. Use these to locate the causing factors.
Refer to the specifi c 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 disconnected.
6. Kill switch in OFF position.
7. Faulty spark plug.
8. Faulty ignition module.
9. Low oil level.
10. Flywheel key sheared.
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 thro le 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. Intake system leak.
8. Low oil level.
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 thro le controls.
6. Faulty spark plug.
7. Low compression.
8. Weak spark.
9. Engine overheated-cooling/air circulation
restricted.
10. Quality of fuel.
11. Flywheel key sheared.
12. Intake system leak.
Engine Will Not Crank
1. PTO drive is engaged.
2. Ba ery (if equipped) is discharged.
3. Faulty electric starter or solenoid (electric start).
4. Pawls not engaging in drive cup (retractable
start).
5. Seized internal engine components.
Engine Runs But Misses
1. Dirt or water in the fuel system.
2. Spark plug lead loose.
3. Poor quality of fuel.
4. Faulty spark plug.
5. Loose wires or connections that intermi ently
ground the ignition kill circuit.
6. Engine overheated.
7. Faulty ignition module or incorrect air gap.
8. Carburetor adjusted incorrectly.
Engine Will Not Idle
1. Dirt or water in the fuel system.
2. Stale fuel and/or gum in carburetor.
3. Faulty spark plug.
4. Fuel supply inadequate.
5. Idle fuel adjusting needle improperly set.
6. Idle speed adjusting screw improperly set.
7. Low compression.
8. Restricted fuel tank cap vent.
9. Engine overheated-cooling system/air circulation
problem.
To Next Page
Loading...
Need help?
General