[Putershark]

Yep,
I can usually cook up a few hair brained ideas (both Engineering and Non Engineering types) in short order! Ha-Ha... So I came up with another one for this frozen block from left over flushing water issue

Just take one of those "Salt Away" type mixer units http://www.saltawayproducts.com/MixerPage.htm and after using the "Salt Away" product (if you run in salt water) for the final flush for the season, just fill the container back up with some Coolant (Anti Freeze) and run the engine on that mix for about 10 min or so... The ratio of coolant to water "should" be enough (pending on model) to prevent any freeze up of any internal engine parts from standing water.

Dick just needs to do the same for his bilge pump, by shooting some of that mix into the pump area bilge high enough to turn the pump on also... I would just make sure you are using the type of Coolant that is "Pet Safe" unless of course you are looking to terminate a few stray cats in the "Hood" at the same time

Dave