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Owner’s Manual
ECV-4501
Air filter (Fig. 3-2)
The air filter (1) must be cleaned from dust and dirt in order to
avoid:
• Carburetor malfunctions.
• Starting problems.
• Engine power reduction.
• Unnecessary wear on the engine parts.
• Abnormal fuel consumption.
Clean the air filter daily or more often if working in exceptionally
dusty areas.
Cleaning the air filter
Remove the air filter cover and the filter (1). Rinse it in warm soap suds. Check that the filter is dry before
reassembly. An air filter that has been used for some time cannot be cleaned completely. Therefore, it must
regularly be replaced with a new one. A damaged filter must always be replaced.
Spark plug (Fig. 3-3)
The spark plug condition is influenced by:
• An incorrect carburetor setting.
• Wrong fuel mixture (too much oil in the gasoline)
• A dirty air filter.
• Hard running conditions (such as cold weather).
These factors cause deposits on the spark plug electrodes, which may
result in malfunction and starting difficulties. If the engine is low on
power, difficult to start or runs poorly at idling speed, always check the
spark plug first. If the spark plug is dirty, clean it and check the electrode
gap. Readjust if necessary. The correct gap is 0.6mm (.024”). The spark
plug should be replaced after about 100 operation hours or earlier if the
electrodes are badly eroded.
NOTE!
In some areas, local law requires using a resistor spark plug to suppress ignition
signals. If this machine was originally equipped with resistor spark plug, use same type
of spark plug for replacement.