Honda HARMONY HRB215PXA Owner's Manual page 71

STORAGE
3. With the mower in an upright position, start the engine outdoors,
and let it run until it reaches normal operating temperature to
evaporate any water remaining on the engine.
4. While the engine is running, operate the blade control lever 4 or 5
times to expel water from the blade control mechanism. Allow the
blade(s) to spin for several minutes to ensure that no water
remains.
5. Stop the engine and allow it to cool.
6. After the lawn mower is clean and dry, touch up any damaged
paint, and coat other areas that may rust with a light film of oil.
Lubricate the control cable cores with a silicone spray lubricant.