passive fresh water flush for closed cooled engines?
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passive fresh water flush for closed cooled engines?
I have twin 525HPs with closed cooling. Boat is on a lift, so I can't access the drives to flush with muffs. Can I plumb T's with a quick connect (downstream from the seawater pump), and run garden hose freshwater through the heat exchanger/oil cooler/exhaust without cranking the engine? Not worried about flushing the drives. I run in brackish water. I would like to be able to quick connect from the outer hull without opening the hatch or running the engines. Thanks in advance!!
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I have twin 525HPs with closed cooling. Boat is on a lift, so I can't access the drives to flush with muffs. Can I plumb T's with a quick connect (downstream from the seawater pump), and run garden hose freshwater through the heat exchanger/oil cooler/exhaust without cranking the engine? Not worried about flushing the drives. I run in brackish water. I would like to be able to quick connect from the outer hull without opening the hatch or running the engines. Thanks in advance!!
Last edited by TahoeRick; 02-21-2013 at 11:29 PM.
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they say if you run water thru exhaust without engine running it can go into the engine. if risers are long enough to where water mixes with exh with enough drop you might be ok.
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More common you'll find the T's before the pump, you'll have to start the motor to flush. The additional benefit is it will back flush the drives when the motors off. Very common on Volvo
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This is what i have on 496ho,s flushes the drives for a few min then fire up and do motors .
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All looks very neat from outside . WOW finished
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just plumb a shutoff valve into a tee to move direction of water and they make a thru hull hose connection, works great, just make sure you move valve back to drive pick up or you will kill the impellor quick...