TROUBLESHOOTING

Symptom

Engine will not start

User error

Fuel system

Spark plug

No spark after checking spark plug

Low compression

Engine is under-powered or runs unevenly

Air filter

Fuel system

Blue or voluminous blue-white exhaust

Black exhaust

Ignition system

Low compression

Cause

Fuel valve closed. Choke valve open

Engine switch in OFF position Fuel tank empty

Machine stored without observing proper procedure from chapter “Storage/Winter storage”

Contamination, water or ice in fuel system.

Carburetor problems.

Wrong spark plug type.

Build-up on electrodes. Short circuit.

Gasoline or oil on the spark plug.

Faulty engine switch, cable or ignition.

Serious interior engine damage or faulty valves.

Clogged air filter

Machine stored without observing proper procedure from chapter “Storage/Winter storage”

Contaminated or incorrect fuel

Choke left on

Clogged air filter

Carburetor problems

Wrong spark plug type

Build-up on electrodes. Short circuit.

Faulty ignition unit.

Serious interior engine damage or faulty valves.

Action

Open the fuel valve.

Close the choke with cold engine. Turn the engine switch to ON Fill with fuel

Clean tank, sludge reservoir and empty carburetor. Fill the tank with fresh fuel.

Clean tank, sludge reservoir and empty carburetor. Fill the tank with fresh fuel.

Contact an authorized service workshop.

Replace the spark plug.

Check electrode gap and clean or replace spark plug.

Clean the spark plug. Air the engine out. Start with full throttle.

Contact an authorized service workshop.

Contact an authorized service workshop.

Clean or replace the air filter

Clean tank, sludge reservoir and empty carburetor. Fill the tank with fresh fuel.

Clean tank, sludge reservoir and empty carburetor. Fill the tank with proper fuel.

Open choke valve

Clean or replace the air filter

Contact an authorized service workshop.

Replace the spark plug

Check electrode gap and clean or replace spark plug.

Contact an authorized service workshop.

Contact an authorized service workshop.

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Husqvarna 966067001 manual Troubleshooting, Symptom Engine will not start, Engine is under-powered or runs unevenly, Cause

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