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PAGE 28 — GAC-6HZ 60 HZ GENERATOR• OPERATION AND PARTS MANUAL — REV. #1 (03/31/10)
TROUBLESHOOTING (ENGINE)
Table 6. Engine Troubleshooting
Symptom Possible Cause Solution
Difficult to start. Fuel is
available but no SPARK
at spark plug.
Spark plug bridging? Check gap, insulation or replace spark plug.
Carbon deposit on spark plug? Clean or replace spark plug.
Short circuit due to deficient spark plug
insulation?
Check spark plug insulation. Replace if
worn.
Improper spark plug gap? Set to proper gap.
Difficult to start. Fuel is
available and SPARK
is present at the spark
plug.
ON/OFF switch is shorted? Check switch wiring. Replace switch.
Ignition coil defective? Replace ignition coil.
Improper spark gap, points dirty? Set correct spark gap and clean points.
Condenser insulation worn or short
circuiting?
Replace condenser.
Spark plug wire broken or short circuiting? Replace defective spark plug wiring.
Difficult to start. Fuel
is available, SPARK is
present at the spark
plug and compression
is normal.
Wrong fuel type?
Flush fuel system and replace with correct
type of fuel.
Water or dust in fuel system? Flush fuel system.
Air cleaner dirty? Clean or replace air cleaner.
Difficult to start. Fuel
is available, SPARK is
present at the spark
plug and compression
is low.
Suction/exhaust valve stuck or protruded? Reseat valves.
Piston ring and/or cylinder worn? Replace piston rings or piston.
Cylinder head and/or spark plug not
tightened properly?
Torque cylinder head bolts and spark plug.
Head gasket and/or spark plug gasket
damaged?
Replace head and spark plug gaskets.
No fuel present at
carburetor.
Fuel not available in fuel tank? Fill with correct type of fuel.
Fuel cock does not open properly?
Apply lubricant to loosen fuel cock lever.
Replace if necessary.
Fuel filter clogged? Replace fuel filter.
Fuel tank cap breather hole clogged? Clean or replace fuel tank cap.
Air in fuel line? Bleed fuel line
Weak in power.
Compression is proper
and does not misfire.
Air cleaner dirty? Clean or replace air cleaner.
Improper level in carburetor? Check float adjustment. Rebuild carburetor.
Defective spark plug? Clean or replace spark plug.