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7.2 Engine stops during operation - no sparks
Problem
Cause
Engine suddenly
The switch is accidentally set to off.
stops.
The plug cap is not attached.
The switch cable or high-voltage cable is
worn.
Internal fault in the coil.
The engine has burned out.
The air flow filter is blocked.
Engine speed gradu-
There is no fuel.
ally decreases and
There is a blockage in the carburetor.
the engine stops.
There is water in the fuel.
Engine speed sud-
There is no fuel.
denly increases, and
There is a blockage in the carburetor.
then the engine stops.
7.3 Engine stops during operation
Remove the spark plug from the cylinder. Hold the
cylinder and pull the starter to see if there are sparks
between the spark plug electrodes.
Problem
Cause
Engine suddenly
The engine runs lean.
stops.
Dirt causes blockage in the air flow. This de-
creases the temperature of the engine.
Dirt on the cylinder fin causes blockage.
Low quality fuel is used.
There is carbon in the combustion chamber
(run-on occurs).
The edge of the spark plug is red hot.
Switch.
The switch is defective.
The cable is broken.
There is an internal fault in the ignition mod-
ule.
1453 - 001 - 02.04.2020
There are no sparks at the spark plug
Solution
Set the switch to the left position.
Attach the plug cap fully.
Replace.
Replace.
Disassemble and repair.
Clean.
Fill with fuel.
Clean.
Empty the fuel tank, clean the inner surface
of the tank and then fill with good quality fuel.
Fill with fuel.
Clean.
Solution
Adjust, repair or replace the carburetor.
Clean.
Clean.
Replace with good quality fuel.
Clean.
Champion RCJ 6Y/NGK BPMR 7A: Adjust to
0.5 mm.
Replace.
Replace.
Replace.
Troubleshooting - 71
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