How do I winterize the red hose?

[ZZ13]

I thought I'd get an early start on collecting my winterization plan. My boat is slipped 24-7 in the DC area. Water around the boat never freezes. I have bravoIII feeding the engine mounted seawater pump via the red inlet hose. My boat has previously always been winterized by the marina using the bucket method. But I plan to do it myself this winter using the 3-pt drain to drain it and filling through the hoses attached to the t-stat housing. That will take care of everything except the red supply hose that runs from the transom to the pump. How the heck do I get the water out of it and filled with antifreeze when my boat is sitting in the water 24-7? Or do I not worry about it since its effectively below the water level and should be close to the water temperature at all times.

 

[Bt Doctur]

you cant ,unless you raise the boat and outdrive out of the water.
If you had a seacock, you could close the valve and drain the hose, but that a chance you take. If the seascock freezes and cracks, your going down

 

[ZZ13]

you cant ,unless you raise the boat and outdrive out of the water.
If you had a seacock, you could close the valve and drain the hose, but that a chance you take. If the seascock freezes and cracks, your going down

No seacock. The path from the drive inlet to the water pump is always open and full of water. Could I put muffs on the drive with the hose connection capped off to effectively seal the inlet to the drive (I can easily get muffs on when the drive is in the water)? Then disconnect the red hose at the pump and drain it (lower it or suck it out with shop vac), then raise it and fill it with anitfreeze. That's about the only technique I can think of without hauling the boat.