Re: Winterizing
Assuming your 165HP is a 4 cylinder, 224 cid (3.7 litre) fresh/raw water cooled engine with a fresh water (internal) cooling system, and raw water being used to cool the fresh water through the heat exchanger.<br /><br />The fresh water system should always have some antifreeze in it (don't know the exact details, something about the pH and only fresh water not being all that good to the engine), or, if there's no possibility of freezing, a similar addition. <br /><br />I'll tell you my scenario for a Finnish winter (quite cold
<br /><br />Fresh water system has 50/50 water/antifreeze mixture. You can use drain plugs to purge this, but I just took off some hoses, reconnected them, filled with water (with special cleaner fluid), ran until hot, drain again, run until hot, few times until the drained water is completely clear, then fill with water and antifreeze. That's it for that part
<br /><br />As for saltwater, it gets pumped up by the impeller in the outdrive, travels through a hose to the front of the heat exchanger (port side of engine), travels through the heat exchanger, goes up to the exhaust elbow to cool the exhaust, then out the exhaust ports.<br /><br />Disconnect the seaweater intake hose from the heat exchanger. Hold it up, put a funnel on the end, and poor in fresh water until it comes out the outdrive. Then, poor in a pre-mixed mixture of fresh water and antifreeze, until you can see the antifreeze (usually blue of green) coming out of the outdrive. Now that part of the system is winterized.<br /><br />Then, put a different hose on the heat exchanger input (where the sea weater intake hose used to go), make sure the end reaches higher than the exhaust elbow! Poor in fresh water until you're pretty sure all the salt water is flushed out (through the outdrive). The hose needs to be higher than the elbow in order to force the water through the exchanger, up the exhaust elbow, down the exhaust. Then, poor in the same antifreeze mixture until you see it coming out of the outdrive.<br /><br />So, you now have the fresh water system winterized (by having it be an antifreeze/water mixture) and also the seawater circuit is now filled with antifreeze. Some of it will drain, but the heat exchanger is filled with antifreeze mixture and so is the exhaust elbow, etc.<br /><br />Very fast to do, 5 minute job. Make sure you do have the same engine I am talking about
Feel very free to ask someone to confirm my story!!<br /><br />Cheers,<br />Dennis
