This is what I did for a fresh water flush. I installed a Tee in the hose between the sea strainer and the engine water pump. When I'm done with a cruise I hook up a water hose to the Tee. I keep the valve off while hooking up the water hose and turn the water on to about half pressure. The engine is still running. I open up the valve and then close the seacock. I now have fresh water going into the engine. I let it run about 5 minutes and then turn the engine off and disconnect.
My method is very simple.
I disconnect my hose that is attached to my sea water intake valve, Kingston valve or whatever. Get a 5 gal bucket (clean) and put in low and close enough to the hose so it will easily reach the bottom of the bucket. Get one or more buckets w fresh water in them to replenish the water pumped out while the engine is running. Start the engine and pour water into the suction bucket until the water is gone. Repeat if necessary. Not necessary for me as I have a small engine. Open and close the sea water inlet valve as necessary.
If you unhook the sea water inlet hose now and then (or often) it should be easy to remove. Good place to double clamp.
Who's T did you use? and what other items such as the fitting above the T? I too am getting ready to install similar set up and thought this was slick. I have three motors to flush and would like to make sure it's easy - something like a quick disconnect so I can transfer from each engine to flush would be slick.
I will have a valve installed in the lid of my water strainer, the pressurised fresh water hose is permanently attached to this valve: Make sure the water pump for the fresh water system is turned on. While the engine is running at idle, open the fresh water valve, close the strainer sea cock, run the engine for a few minutes, then shut down the engine and close the fresh water valve. The lid on the strainer is transparent so it is possible to see if the strainer is full of water or not...
Does anyone believe the exhaust elbow will last longer with a 5 min flush?
The heat exchanger for engine and tranny with FW cooling could care less , if its a quality item.
So the question is why bother?
But it makes me feel good!
Nothing better than that until your wife finds out....
Heat exchangers stay cleaner, corrosion markedly reduced and water injection elbows last longer. Turbos are probably happier not sleeping in a salt-laden atmosphere - at least I hope so.
The zincs protect the bronze castings and cupronickel tubes of the heat exchangers when they are exposed to seawater. When they are in fresh water, which should be 95% of the time in most cases if you flush with fresh water, then there will be very little corrosion of the bronze and cupronickel and little wastage of the zinc.
The fact that the zincs don't do much good in fresh water is exactly why you want to flush with fresh water. Keep the bronze/cupro-nickle in fresh water and there won't be any significant corrosion.
David