Harbor Freight Tools 69728 Troubleshooting cont, Problem, Possible Causes, Probable Solutions

Troubleshooting (cont.)

Problem		Possible Causes		Probable Solutions
	1.	Spark plug cap loose.	1.	Check wire connections.
	2.	Incorrect spark plug gap or	2.	Re-gap or replace spark plug.	Safety
		damaged spark plug.
	3.	Defective spark plug cap.	3.	Replace spark plug cap.
Engine misfires	4.	Old or low quality gasoline.	4.	Use only fresh 87+ octane unleaded gasoline.
				Do not use gasoline with more than
				10% ethanol (E15, E20, E85, etc.).
	5.	Incorrect compression.	5.	Diagnose and repair compression.
				(Use Engine will not start:
				Compression Related section.)
	1.	Low oil shutdown.	1.	Fill engine oil to proper level.
				Check engine oil before EVERY use.
	2.	Fuel tank empty or full of impure or low	2.	Fill fuel tank with fresh 87+ octane
		quality gasoline.		unleaded gasoline.
Engine stops				Do not use gasoline with more than
				10% ethanol (E15, E20, E85, etc.).
suddenly	3.	Defective fuel tank cap creating	3.	Test/replace fuel tank cap.	Setup
		vacuum, preventing proper fuel flow.
	4.	Faulty magneto.	4.	Have qualified technician service magneto.
	5.	Disconnected or improperly	5.	Secure spark plug cap.
		connected spark plug cap.
Engine stops when	1.	Dirty air filter.	1.	Clean or replace element.
	2.	Engine running cold.	2.	Allow engine to warm up prior
under heavy load
				to operating equipment.
	1.	Old or low quality gasoline.	1.	Fill fuel tank with fresh 87+ octane
				unleaded gasoline.
				Do not use gasoline with more than
Engine knocks				10% ethanol (E15, E20, E85, etc.).
	2.	Engine overloaded.	2.	Do not exceed equipment’s load rating.	Operation
	3.	Incorrect spark timing, deposit buildup,	3.	Have qualified technician diagnose
		worn engine, or other mechanical problems.		and service engine.
	1.	Impure or low quality gasoline.	1.	Fill fuel tank with fresh 87+ octane
				unleaded gasoline.
				Do not use gasoline with more than
				10% ethanol (E15, E20, E85, etc.).
Engine backfires	2.	Engine too cold.	2.	Use cold weather fuel and oil
				additives to prevent backfiring.
	3.	Intake valve stuck or overheated engine.	3.	Have qualified technician diagnose
				and service engine.
	4.	Incorrect timing.	4.	Check engine timing.
	1.	Product not plugged in properly.	1.	Turn off and unplug the product, then
Product doesn’t				plug it back in again and turn on.
	2.	Circuit Breaker tripped.	2.	Turn off and unplug product, Reset Circuit
have power					Maintenance
				Breaker. Plug in product and turn on.
	3.	Product needs service.	3.	Have product repaired.
	1.	Problem with appliance.	1.	Immediately unplug appliance. Have
				appliance repaired by a qualified
Product begins to				technician, or replace appliance.
operate abnormally	2.	Rated load capacity exceeded.	2.	Lower the number of items plugged into the
				generator to stay within the rated capacity,
				or use a more powerful generator.

Follow all safety precautions whenever diagnosing or servicing the equipment or engine.

Item 69728 / 69729	For Pump technical questions, please call 1-800-444-3353.	Page 19
	For Engine technical questions, please call 1-800-520-0882.