Honda WT20X Owner's Manual page 36

4. Install the O-ring on the pump cover, taking care not to damage the O-ring.
5. Install the pump cover on the pump casing, and tighten the knobs handtight.
Then, set the wrench to the knobs and finish tightening the knob securely.
NOTE:
After tightening the pump cover knob, check the pump cover and pump
casing to ensure that there is no water leakage.
6. Install the pump drain plug in the pump cover.
WRENCH
O-RING
PUMP COVER
DRAIN PLUG
KNOB
33