Re: Winterising an inboard for cold outside temps
I tried that kit last year, and I was not sure if all the water was displaced so I would up draining it and filling with antifreeze anyway. On the 3.0 it is pretty easy, there is basically one drain on the block (port side aft) one on the manifold (underside of it, near block drain), and if you have power steering, there is a 7/16th plug you have to remove on the cooler. I also disconnect the hose that goes from the outdrive to the thermo housing, and the water pump hose (big one) and drain both of them. After you pull out the drain plugs, stick a nail or stiff wire into them to make sure it drains, a fair amount of water should come out. Now on the outdrive (should be all the way down for winter storage) 3 plugs that have to be removed, on on the port side and 2 on the starbord side.You will have to raise the drive to remove the ones on the starbord side. After it drains and you replace the plugs, you can fill the engine with antifreeze through the big hose that goes from the thermo housing to the water pump. After filling, you can crank the engine like 1/2 turn (DO not start it) to make sure the antifreeze gets into all areas esp the impeller housing in the outdrive. I recommend you get the OMC shop manual it shows you where all the plugs are and makes it easy to understand esp if you have never done it before. Not a job where you want to take a chance!!<br />The other thing I have heard about the kits that allow you to pull the AF in from the tank is that if your impeller is not in good shape it may not pull it in, or the engine may overheat while you are doing this.