I have had a Yamaha c90 since 1999 and always fogged the engine, changed the lower unit oil, trickle charged the battery, added stabil etc. In addition the impeller and steering cable have been replaced professionally. What if instead of winterizing as described above, I would start the boat up all winter long. Long Island winters are normally nothing like upstate NY and outside of maybe a two week period of below freezing and some snow, would be able to hop under the cover (removing it partially for ventilation) and run the engine with a hose and muffs. Any drawbacks to this ? I may be selling the boat in the spring and thought this might be an option.