Husqvarna 968999239 Operator's Manual

43TROUBLESHOOTINGSymptom Cause ActionThe engine will not start• User error Fuel valve closed. Open the fuel valve.Choke valve open. Close the choke with cold engine.Engine switch in OFF position. Turn engine switch to ON.• Fuel system Fuel tank empty. Fill with fuel.Machine stored without Clean tank, sludge reservoir andobserving proper procedure empty carburetor.from chapter “Storage/Winter Fill the tank with fresh fuel.storage”.Contamination, water or ice in Clean tank, sludge reservoir,fuel system fuel lines and carburetor.Fill the tank with fresh fuel.Carburetor problems. Contact an authorized serviceworkshop.• Spark plug Wrong spark plug type. Replace the spark plug.Buildup on electrodes. Check electrode gap and clean orShort circuit. replace spark plug.Gasoline or oil on the spark plug. Clean the spark plug. Air theengine out. Start with full throttle.• No spark after Faulty engine switch, cable Contact an authorized servicechecking spark plug or ignition. workshop.• Low compression Serious interior engine Contact an authorized servicedamage or faulty valves. workshop.Engine is gutless or runs unevenly• Air filter Clogged air filter. Clean or replace the air filter.• Fuel system Machine stored without observ- Clean tank, sludge reservoir anding proper procedure from empty carburetor.chapter “Storage/Winter storage”. Fill the tank with proper fuel.(Blue exhaust) Tank filled with 2-cycle mixed oil. Fill the tank with proper fuel.(Voluminous blue-white Tank filled with diesel. Clean tank, sludge reservoirexhaust) and empty carburetor.Fill the tank with proper fuel.(Black exhaust) Choke left on. Open choke valve.Clogged air filter. Clean or replace the air filter.Carburetor problems Contact an authorized serviceworkshop.• Ignition system Wrong spark plug type. Replace the spark plug.Buildup on electrodes. Check electrode gap and clean orShort circuit. replace spark plug.Faulty ignition unit. Contact an authorized serviceworkshop.• Low compression Serious interior engine damage Contact an authorized service(possible blue or faulty valve. workshop.exhaust)