When I winterize mine '94 Ski Nautique with the 351 Ford. When I drain the block and the manifolds I spray a hose into the drain holes and let the water drain out. I keep repeating until the water comes out clear. I put the plugs back in, then draw the RV antifreeze out of a bucket while fogging the engine. Since the boat is stored in a semi heated garage which is dry I store it with the gas tank at 1/8th of a tank, but I add enough sta-bil to store 30 gallons. I run that through the engine after changing the oil and letting the boat idle for 10 minutes before draining the block and manifolds. I take the tension out of the belts, and remove the battery and charge it once per month. Going to overhaul my steering system. There is some side to side play in the rudder(not bad yet), and some rotational play(not bad yet). New tilt, maybe a new steering head, cable, going to inspect the clamp block, and the rudder port. I am hoping the rudder shaft is not worn. If it is I will replace it with a tunable rudder. The current cable is okay, but will have to replace it if I replace the steering head since it requires a newer cable design.