Hi Gusman,
Here is what I do:
- Fill the PWC with gas and add marine Stabil
- Run the PWC for a short time (minute or two) to allow the stabilized gas mixture to circulate through the system
- Remove the battery and place it on a trickle charger for the winter
- Thoroughly clean and wax the hull
- Put the PWC in storage (storage unit) with the seat and storage compartment open to allow any residual water to evaporate
- Put dryer sheets and mouse pellets in the storage area to prevent any winter mouse damage
Some people will additionally "fog" the engine. I have found that it has not really been necessary (IMHO).