Honda FF 300 Owner's Manual page 38

Air cleaner service
A dirty air cleaner will restrict air flow to the carburetor. To prevent
carburetor malfunction, service the air cleaner regularly. Service more
frequently when operating the engine in extremely dusty areas.
Never run the engine without the air cleaner. Rapid engine wear will
result.
1. Push the latch tabs and pull the air cleaner cover out of the air
cleaner case, then disengage the lower hooks from the air cleaner
case and remove the air cleaner cover.
AIR CLEANER CASE
2. Remove the element. Carefully check the element for holes or tears
and replace it if damaged.
AIR CLEANER COVER
ELEMENT
LATCH TAB
LOWER HOOK
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