[throwback]

I have a 76 hull with the original gm 250 stright six. I pull the plug out of the engine and drain the block. The engine has an osco manifold pull the plug and drain it. check to outdrive for water in lower unit. I occasionally use the boat in the winter on lake ontario and never have had a problem.Make sure the io is in the down position for storage. Use marval mystry oil thru carb to shut it down. Never give the engine much special care it is bullet proof