Vid....
I can't watch the vid from work but it seems your reading way much more into this that there truly is. It's not like a care or something. I know, in Connecticut, you want to make sure you protect the motor but, our engines are a TLCS (total loss cooling sysytem). When your ready to set it up and you've flushed for the last time, let it run for a few seconds after you shut off your back flush water. About 90% of that water will be blown out.
If you think about damage from freezing, you can look at it the way an ice cube freezes in an ice try. The water trapped in our skis is in small puddles. Not inside a cavity that might crack from expansion as the ice freezes.
I think I saw in your avatar, you had a 96, so it's either a 717 or 787. If you look on the engine where the water is supplied by the jet pump, pinch that hose. Then, at your flush connection, pour in about a quarter gallon of antifreeze, then un-pinch the hose...........your protected.
If possible, you can also take a shop light and put it in the engine compartment. This will keep the humidity from building, getting into your linkages and electrical system. It would also provide a degree of heat to keep the engine compartment above freezing. The only one real thing you have to make sure you do before using a light buld, .......make sure you do not put it near a fuel source, like near the gas tank. A light buld can heat up the fuel and cause it to create fuel vapors. If the light buld broke, then it could catch fire. I put my light in the back of the ski, over the shaft pointing toward the PTO.............
I wish I could see your vid but believe me, there is so many ways to do this, it's unbelievable. The geographical location plays a huge roll as to how much winterizing you actually have to have..............:cheers:
