Original User Manual FX-4MS131_rev03
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5 Install the filter cover and screw the screw back in clockwise.
Spark plug maintenance
To ensure regular operation of the engine, the ignition distance of 0.6 - 0.7
must be maintained and free of carbon deposits.
1 Carefully remove the spark plug connector. Do not pull on the cable but directly on the plug.
2 Use the spark plug wrench supplied to unscrew the spark plug.
3 Visually check the spark plug for damage or electrode burn-off.
Remove the carbon deposits.
4 Check the gap with a feeler gauge and bend the electrode to the correct
distance of 0.6 to 0.7mm
5 Check the spark plug washer and screw the spark plug in the first 2-3
threads manually first.
6 Mount the ignition cap back on the spark plug
WARNING
The spark plug must be screwed down tightly; otherwise, the engine runs hot and is damaged.
Maintenance during storage of the machine
If the engine is not to be used for a more extended period, the following maintenance must be carried
out:
1 Open the fuel filler cap and drain the fuel completely. Operate the primary pump until the gasoline is
completely removed from the fuel lines.
2 Open the oil cap and completely drain the lubricating oil as described
3 Adjust the crankshaft to top dead centre (by pulling the starter) to ensure that the air does not cause
corrosion
4 Wipe off all oil stains and clean the cooling fins. Place the device in a clean, dry, and well-ventilated
place.
Spark plug window
Spark plug
Spark
plug
connector
cleaning of coal deposits
Removing the spark
plug
0.6~0.7mm
