Multiquip GAC-9.7HZ manual troubleshooting ENGINE, Engine Troubleshooting, Symptom, Possible Cause

troubleshooting (ENGINE)

Table 6. Engine Troubleshooting

Symptom	Possible Cause	Solution
	Spark plug bridging?	Check gap, insulation or replace spark plug.
Difficult to start. Fuel is	Carbon deposit on spark plug?	Clean or replace spark plug.
available but no SPARK	Short circuit due to deficient spark plug	Check spark plug insulation. Replace if
at spark plug.	insulation?	worn.
	Improper spark plug gap?	Set to proper gap.
	ON/OFF switch is shorted?	Check switch wiring. Replace switch.
Difficult to start. Fuel is	Ignition coil defective?	Replace ignition coil.
available and SPARK	Improper spark gap, points dirty?	Set correct spark gap and clean points.
is present at the spark
	Condenser insulation worn or short	Replace condenser.
plug.
	circuiting?
	Spark plug wire broken or short circuiting?	Replace defective spark plug wiring.
Difficult to start. Fuel	Wrong fuel type?	Flush fuel system and replace with correct
is available, SPARK is		type of fuel.
present at the spark
	Water or dust in fuel system?	Flush fuel system.
plug and compression
	Air cleaner dirty?	Clean or replace air cleaner.
is normal.
	Suction/exhaust valve stuck or protruded?	Reseat valves.
Difficult to start. Fuel
	Piston ring and/or cylinder worn?	Replace piston rings or piston.
is available, SPARK is
	Cylinder head and/or spark plug not
present at the spark		Torque cylinder head bolts and spark plug.
	tightened properly?
plug and compression
is low.	Head gasket and/or spark plug gasket	Replace head and spark plug gaskets.
	damaged?
	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.
No fuel present at		Replace if necessary.
carburetor.	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.	Air cleaner dirty?	Clean or replace air cleaner.
Compression is proper	Improper level in carburetor?	Check float adjustment. Rebuild carburetor.
and does not misfire.
	Defective spark plug?	Clean or replace spark plug.

page 30 — GAC9.7HZ 60 hz gENERATOR• operation and parts manual — rev. #2 (03/31/10)