Webb WER21HW Operator's Manual And Parts List page 14

Spark Plug
Once the engine has cooled, remove the spark plug and clean the plug with a wire brush. Using a feeler
gauge, set the gap to 0.75 mm (0.030"). Refit the spark plug taking care not to overtighten it.
Air Filter
Unclip the air filter cover and remove the paper filter element. Close the air filter cover to avoid objects
falling into the air intake, while you clean or replace the paper filter element.
PAPER ELEMENT
AIR CLEANER COVER
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