I had a couple of requests to post some pictures of my winterizing setup, so here is what I use:
Overall view of what you need
1. 2-3 gallons of (non-toxic) RV antifreeze per engine
2. Bucket that will hold at least 3 gallons
3. Quick connect hose adapter
4. Old bilge pump or other type of water pump that will pressurize and pump water through your engine just like the hose would do if you were running it out of water. I just used an old 12 volt bilge pump I found in the garage, hooked up some long wire leads with battery clips on the end.
5. Length of hose to connect the bilge pump outlet to the flush port on the boat, maybe about 4ft or so. Clear hose is best so you can see what is being pumped in as you do this.
6. 12 volt battery, to hook up the bilge pump. I suppose you can use the boat battery or what ever source of power you need depending on what type of pump you use. I always have an extra 12 volt battery in the garage so usually just use that for ease.
7. Some type of threaded plumbing adapter to put on the end of the clear hose so that you can screw on the quick connect fitting and hook it up to the boat flush port. Again, this really depends on what type of pump and hose you are using, be creative.
8. A buddy to help if possible.
Just hook everything up, thread the quick connect into the back of the engine flush port, connect your clear hose to the bilge pump, get your battery ready to hook up and insert the bilge pump into the bucket and pour in 2-3 gallons of the RV antifreeze.
The rest is easy, start the boat (do one engine at a time just as you would if you were flushing the engine on the hose), then turn on your bilge pump to start pumping the pink stuff through the engine. You may need to hold the bilge pump down in the bucket which is where your helper buddy comes in. I keep pumping until i see pink running out of the jet pump and the exhaust hole. You want to make sure that you get it through the entire system especially if you have the supercharged intercooled engine. Plus you want to make sure that you get enough in the exhaust water boxes to prevent freezing. You may need to keep topping off the bucket of antifreeze while it is pumping through the engine to keep the bilge pump submerged.
When you are satisfied that enough anti-freeze has been pumped through the engine, simply turn your bilge pump off. Then I like to give the engine a couple good rev's to dispel as much liquid from the muffler boxes, and shut it off. It should not take more than about 1 min. to get the antifreeze through the engine. So in total your engine should not be running for more than 2 min., which is about the limit anyway to avoid damaging your boat.
After this is done, proceed with all the other winterization tasks and you will be done. I find this is much easier than pulling off hoses in the engine compartment and pouring antifreeze down tubes. Also, I like to use the non-toxic antifreeze because some of this will come out when you run the boat next spring and it's best to avoid polluting our boating waters.
I'll try to make a video and post when I do this myself in a couple weeks, if I have some help.... Feel free to reply with questions or anything and I'll do my best to help you all out.
--Deven