Multiquip manual HS81A CUT-OFF SAW Troubleshooting Engine

HS81A CUT-OFF SAW — TROUBLESHOOTING (ENGINE)

TABLE 4. TROUBLESHOOTING (ENGINE)

SYMPTOM	POSSIBLE CAUSE	SOLUTION
	Spark plug bridging?	Check gap, insulation or
		replace spark plug.
	Carbon deposit on spark plug?	Clean or replace spark plug.
Difficult to start, "fuel is available, but no
	Short circuit due to deficient spark plug	Check spark plug insulation,
SPARK at spark plug".	insulation?	replace if worn.
	Improper spark plug gap?	Set to proper gap.
	Ignition coil defective?	Replace ignition coil.
	ON/OFF switch is shorted?	Check switch wiring, replace
		switch.
	Improper spark gap, points dirty?	Set correct spark gap and
Difficult to start, "fuel is available, and		clean points.
SPARK is present at the spark plug".	Condenser insulation worn or short	Replace condenser.
	circuiting?
	Spark plug wire broken or short circuiting?	Replace defective spark plug
		wiring.
	Wrong fuel type?	Flush fuel system, and replace
		with correct type of fuel.
Difficult to start, "fuel is available, spark	Water or dust in fuel system?	Flush fuel system.
is present and compression is normal".
	Air cleaner dirty?	Clean or replace air cleaner.
	Choke Open?	Close Choke.
	Suction/exhaust valve stuck or protruded?	Re-seat valves.
	Piston ring and/or cylinder worn?	Replace piston rings and/or
		piston.
Difficult to start, "fuel is available, spark
is present and compression is low".	Cylinder head and/or spark plug not	Torque cylinder head bolts and
	tightened properly?	spark plug.
	Head gasket and/or spark plug gasket	Replace head and/or spark plug
	damaged?	gaskets.
	Fuel not available in fuel tank (tank empy)?	Fill with correct type of fuel.
	Fuel filter clogged?	Replace fuel filter.
No fuel present at the carburetor.
	Fuel tank cap breather hole clogged?	Clean or replace fuel tank cap.
	Air in fuel line?	Bleed fuel line.

HS81A CUT-OFF SAW — OPERATION & PARTS MANUAL — REV. #2 (07/26/10) — PAGE 27