If this i s not possible, you may need to provide extra support for the cover, especially if you are in an area with heavy snows. Two-inch PVC pipe is easy to work with and makes good supports. Its round shape keeps it from damaging your boat cover. Shrink wrapping is also excellent in areas subject to snows. If your boat is stored on a trailer, you may want to block the trailer frame to take pressure off the tires and springs.
Fuel needs to be drained or stabilized and cooling system needs to be drained.
Check with your dealer for procedures specific to your motor. By following these steps and your dealer's recommendations, your boat will be in tip-top condition after its hibernation and you'll be able to concentrate solely on your skiing in the spring. Remember, failure to follow manufacturer's maintenance recommendations may affect warrantee coverage, so always check with your dealer when you have a question. I was looking through the Canadian Waterski Page's FAQs during lunch and looked through the winterization section. I was still worried about any residual water so when it really got cold, I put a 100 watt shop light under the engine.