Troubleshooting

Problem

Cause

Correction

 

1.

One of the circuit breakers is open.

1.

Reset circuit breaker.

Engine is running, but no AC

2.

Fault in generator.

2.

Contact authorized service facility.

3.

Poor connection or defective cord set.

3.

Check and repair.

output is available.

4.

Connected device is bad.

4.

Connect another device that is in good

 

 

 

 

 

condition.

 

 

 

 

 

 

1.

Short circuit in a connected load.

1.

Disconnect shorted electrical load.

Engine runs good at no-load but

2.

Engine speed is too slow.

2.

Contact authorized service facility.

“bogs down” when loads are

3.

Generator is overloaded.

3.

See Don’t Overload Generator in

connected.

 

 

 

Operation section.

 

4.

Shorted generator circuit.

4.

Contact authorized service facility.

 

 

 

 

 

 

1.

Rocker switch set to “Off”.

1.

Set switch to “On”.

 

2.

Fuel Valve is in “Off” position.

2.

Turn fuel valve to “Open” position.

 

3.

Dirty air cleaner.

3.

Clean or replace air cleaner.

 

4.

Out of fuel.

4.

Fill fuel tank.

 

5.

Stale fuel.

5.

Drain fuel tank and carburetor; fill with

 

 

 

 

fresh fuel.

Engine will not start; or starts

6.

Spark plug wire not connected to spark

6.

Connect wire to spark plug.

 

plug.

 

 

and runs rough.

 

 

 

7.

Bad spark plug.

7.

Replace spark plug.

 

 

8.

Water in fuel.

8.

Drain fuel tank and carburetor; fill with

 

 

 

 

fresh fuel.

 

9.

Flooded.

9.

Wait 5 minutes and re-crank engine.

 

10.

Excessively rich fuel mixture.

10.

Contact authorized service facility.

 

11.

Intake valve stuck open or closed.

11.

Contact authorized service facility.

 

12.

Engine has lost compression.

12.

Contact authorized service facility.

 

 

 

Engine shuts down when

Out of fuel.

Fill fuel tank.

running.

 

 

 

 

 

 

 

 

 

 

1.

Load is too high.

1.

See Don’t Overload Generator in

Engine lacks power.

 

 

 

Operation section.

 

2.

Dirty air filter.

2.

Replace air filter.

 

 

 

Engine “hunts” or falters.

Carburetor is running too rich or too lean.

Contact authorized service facility.

 

 

 

 

 

17

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Husqvarna 420 GN manual Troubleshooting

420 GN specifications

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