Yamaha G21A Owner's/Operator's Manual page 36

UTILITY
MAINTENANCE
Inspection and cleaning:
3. Wash the foam pre-filter in soap
and water. Allow it to dry.
å Soap and water
∫ Foam element
4. Check the filter element. If dam-
Y-508
aged or dirty, replace it.
CAUTION
Do not wring out the foam pre-fil-
ter, this could cause it to tear.
5. To replace the elements, reverse
the above steps.
CAUTION
The pre-filter has a notch on one
side. It will only fit in the case one
way.
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