TROUBLESHOOTING

 

 

 

 

 

 

TABLE 7. ENGINE TROUBLESHOOTING

 

 

 

 

 

 

 

SYMPTON

POSSIBLE CAUSE

SOLUTION

 

 

 

 

 

 

 

 

Spark plug bridging?

Check gap, insulation or

 

 

 

replace spark plug.

 

 

 

 

 

 

 

 

 

 

 

Difficult to start, "fuel is available, but no

Carbon deposit on spark plug?

Clean or replace spark plug.

 

 

SPARK at spark plug".

Short circuit due to deficient spark plug

Check spark plug insulation,

 

 

 

 

 

 

insulation?

replace if worn.

 

 

 

 

 

 

 

 

Improper spark plug gap?

Set to proper gap.

 

 

 

 

 

 

 

 

ON/OFF switch is shorted?

Check switch wiring, replace

 

 

 

switch.

 

 

 

 

 

 

 

 

 

 

 

 

Ignition coil defective?

Replace ignition coil.

 

 

 

 

 

 

 

Difficult to start, "fuel is available, and

Improper spark gap, points dirtry?

Set correct spark gap 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.

 

 

 

 

 

 

 

 

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 spark plug

 

 

 

damaged?

gaskets.

 

 

 

 

 

 

 

 

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.

 

 

 

 

 

 

No fuel present at 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.

 

 

 

 

 

 

MVC77 PLATE COMPACTOR — OPERATION AND PARTS MANUAL — REV. #4 (1/14/11) — PAGE 23

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Multiquip ONE-WAY PLATE COMPACTOR manual Engine Troubleshooting