hoped4
Member
Previously we, put fresh water through the engine before being towed to the lift out. How, and at what point, do you do it when you motor to the lift out? Pour it Direct from a bucket into the top of the strainer?
But if using a propylene glycol based antifreeze be sure to use one intended for use as an engine coolant not one merely intended to prevent an RV water system from freezing because the latter may not contain the corrosion inhibitors which are one of the reasons for flushing the seawater system with antifreezeI installed one of these "two way" seacocks with its ability to draw in outside water for engine cooling or valve it over and draw in anti-freeze for winterizing. I use the inexpensive pink "RV antifreeze" for winterizing and it takes about 3 quarts. That protects the whole system from thru hull, thru the strainer and heat exchanger, and also the water lift muffler.
Hope the link works....
https://www.jamestowndistributors.com/userportal/document.do?docId=990
You can probably find them at a nearby chandler.
But if using a propylene glycol based antifreeze be sure to use one intended for use as an engine coolant not one merely intended to prevent an RV water system from freezing because the latter may not contain the corrosion inhibitors which are one of the reasons for flushing the seawater system with antifreeze
Since this is all about replacing outside water destined only to travel thru the heat exchanger, I am not understanding what corrosion inhibitors you refer to. Protecting the raw water side on a "fresh water cooled" engine has no connection with the internal cooling passages inside the engine.
I do it ashore. Take the hose off the raw water pump & connect another to a bucket. Put a hose pipe in the bucket & run for as long as I want. The hose pipe has a valve on the end so I can adjust the flow to match the demand from the engine. Once I'm done, I switch off the hose. Then add antifreeze as the last of the water is sucked up & shut off the engine before it goes dry.
Then 2 more actions: oil & raw water impeller. Drain the oil with a sump pump while it's warm, replace the filter & refill with fresh. Remove the raw water impeller so it doesn't sit in the same place for six months. Replace in the spring with a new one if required.
I do it ashore. Take the hose off the raw water pump & connect another to a bucket. Put a hose pipe in the bucket & run for as long as I want. The hose pipe has a valve on the end so I can adjust the flow to match the demand from the engine. Once I'm done, I switch off the hose. Then add antifreeze as the last of the water is sucked up & shut off the engine before it goes dry.
Then 2 more actions: oil & raw water impeller. Drain the oil with a sump pump while it's warm, replace the filter & refill with fresh. Remove the raw water impeller so it doesn't sit in the same place for six months. Replace in the spring with a new one if required.