Husqvarna 420 GN Operator's Manual

Also see for 420 GN: Illustrated parts list

Contents

17TroubleshootingProblem Cause CorrectionEngine is running, but no ACoutput is available.1. One of the circuit breakers is open.2. Fault in generator.3. Poor connection or defective cord set.4. Connected device is bad.1. Reset circuit breaker.2. Contact authorized service facility.3. Check and repair.4. Connect another device that is in goodcondition.Engine runs good at no-load but“bogs down” when loads areconnected.1. Short circuit in a connected load.2. Engine speed is too slow.3. Generator is overloaded.4. Shorted generator circuit.1. Disconnect shorted electrical load.2. Contact authorized service facility.3. See Don’t Overload Generator inOperation section.4. Contact authorized service facility.Engine will not start; or startsand runs rough.1. Rocker switch set to “Off”.2. Fuel Valve is in “Off” position.3. Dirty air cleaner.4. Out of fuel.5. Stale fuel.6. Spark plug wire not connected to sparkplug.7. Bad spark plug.8. Water in fuel.9. Flooded.10. Excessively rich fuel mixture.11. Intake valve stuck open or closed.12. Engine has lost compression.1. Set switch to “On”.2. Turn fuel valve to “Open” position.3. Clean or replace air cleaner.4. Fill fuel tank.5. Drain fuel tank and carburetor; fill withfresh fuel.6. Connect wire to spark plug.7. Replace spark plug.8. Drain fuel tank and carburetor; fill withfresh fuel.9. Wait 5 minutes and re-crank engine.10. Contact authorized service facility.11. Contact authorized service facility.12. Contact authorized service facility.Engine shuts down whenrunning.Out of fuel. Fill fuel tank.Engine lacks power.1. Load is too high.2. Dirty air filter.1. See Don’t Overload Generator inOperation section.2. Replace air filter.Engine “hunts” or falters. Carburetor is running too rich or too lean. Contact authorized service facility.