EarthQuake CS4518 - Manual (Page 27)

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3. oil tank
With a wire hook, take out the oil filter through the filler port
and clean in gasoline. When putting the filter back into the tank,
make sure that it comes to the front right corner. Also clean out dirt in
the tank.
(2) Oil filter
4. Spark plug
Clean the electrodes with a wire brush and reset the gap to
0.65mm as necessary.
Spark plug type:：Champion CJ7Y or equivalent
5. Sprocket
Check for cracks and for excessive wear interfering with the chain
drive. If the wearing is found obviously, replace it with a new one.
Never fit a new chain on a worn sprocket, or a worn chain on a new
sprocket. Always replace cutting system components at the same
time (i.e. bar, chain and sprocket).
(1) Needle bearing
(2) Sprocket
(3) Clutch drum
(4) Washer
(5) Clutch block
6. Front and Rear dampers
Replace if part is peeled or crack is observed on the
rubber part.
Maintenance