Honda WT20X Owner's Manual page 35

5. Servicing the pump casing
After each use, clean the inside of the pump casing using the following
procedure:
1. Remove the pump drain plug from the
pump cover using the wrench to drain
the water inside.
2. Loosen the pump cover knobs using
the wrench.
3. Remove the pump cover and the volute case from the pump casing, and
remove any debris from pump casing and volute case.
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PUMP CASING
PUMP DRAIN PLUG
WRENCH
KNOBS
O-RING
PUMP COVER
WRENCH
KNOBS
VOLUTE CASE