I live in San Jose, Ca. It rarely gets below 32 here but we do get 1 or 2 days every year where it gets down below 32 but never below 28. I have a Glastron 2001 GS249 I/O board. What about just throwing a thermal blanket over the engine??? I really hate to go to all the trouble of removing 4 very hard to get to hoses and drain plugs if I don't have too.