WEN POWER 56173 Owner's Manual page 23

Problem Cause
Engine stops Dirty air filter
when under
Engine running cold.
heavy load
Engine knocks Old or low quality gasoline.
Engine overloaded.
Incorrect spark timing, deposit
buildup, worn engine, or other
mechanical problems.
Engine backfire Impure or low quality gasoline.
s
Engine too cold.
Intake valve stuck or
overheated engine.
Incorrect timing.
Follow all safety precautions whenever diagnosing or servicing the equipment
or engine.
Solution
Clean or replace element.
Allow engine to warm up prior to
operating equipment.
Fill fuel tank with fresh 87+ octane
unleaded gasoline.
Do not exceed equipment's load rating.
Have qualified technician diagnose and
service engine.
Fill fuel tank with fresh 87+ octane
unleaded gasoline.
Use cold weather fuel and oil additives to
prevent backfiring.
Have qualified technician diagnose and
service engine.
Check engine timing.
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