Honda WD20X Owner's Manual page 12

5. Air cleaner
Remove the wing nut, washer and air cleaner cover.
Check the air cleaner element to be sure it is clean and in good condition.
Clean or replace the element if necessary (p. 18 1.
AIR CLEANER COVER
AIR CLEANER ELEMENT
6. Priming
water
The pump chamber should be completely filled before operating.
[NOTICE 1
Do not operate the pump without priming water or the pump will
overheat. Operating the pump dry will destroy the pump seal. If the unit
has been operated dry, stop the engine immediately and allow the pump
to cool before adding priming water.
PRIMING WATER
FILLER CAP
10