Third Year for Me
I leave my 37 Legend in water year round in Northern VA. Rigged some valves with hoses that enable easy handling of engine antifreeze and just drain out and treat the plumbing water system--noone is likely to take many showers in dead of winter, so jerry canning the water for personal use during those months is easy enough. The engine, however, needs to be drained and refilled with antifreeze every trip. I have added a valve and hose on the engine side of the raw water intake seacock for engine and another on the outlet hose just before the engine cooling water is dumped into the exhaust elbow. To prepare for cold weather, I open the exhaust valve and aim the hose into the bilge with a bucket beside it. I close the raw water seacock and open the added valve and stick its intake hose into a jug of antifreeze. It helps to have a friend, but I can do this myself. Next I go up and start the engine set for about 2K RPM and quickly go below to watch the jugs. First old raw water will come out of the hose into the bilge, but as soon as I see any yellow at all, I quickly aim the hose into the bucket which gives me time to pull the stop knob without loosing any antifreeze. Then I close the valve at the intake and leave it set up like this until my next trip. When I return to sail, I open the raw water engine seacock and start the engine to suck in raw water and force out the antifreeze. I go below and watch the discharge, when the yellow stops flowing, I aim the hose into the bilge and go turn off the engine. Then I close the added discharge valve, pour the recovered antifreeze back into the original container, and cleanup a few drips here and there. Only takes about 3 minutes on either side of the trip (coming or going) whereas the old procedure took half hour or more. Additionally, no antifreeze makes its way into my beloved Chesapeake Bay! The antifreeze does slowly get diluted by the little bit of water you capture each time, but I'm still using the same jug of stuff I started with three years ago and the hydrometer still tests it good to 30 below. I sail every month of the year this way.