Selling the boat and found a buyer who is eager for me to run the boat in the driveway on the muffs. He's actually getting a loan and they intend to give him a check and expect title in hand immediately...so it will be difficult to put him off. Problem is, we're supposed to get a cold spell with lows in the 20's at night for about four days coming up. If I run it for him, can I just drain the water from the block and manifold, etc. and be ok at these temps or would there still be a risk to damaging the engine? I gotta believe this will be our last real cold spell. Any thoughts are appreciated.