Draining the antifreeze from the motor

beanz2166

Petty Officer 3rd Class
Joined
Feb 12, 2013
Messages
85
Correct me if Im wrong here guys but when I got to "summerize" my boat there are four plugs on the motor the I need to pull to let the Antifreeze out. Both engine block plugs, exhaust manifold plug and disconnect the power steering cooler hose to let the rest drain out This is being done on a 1996 Merc 5.7
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
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Jul 23, 2011
Messages
47,307
Re: Draining the antifreeze from the motor

if they used marine antifreeze, just hook up the hose and run it in your driveway. Propylene Glycol is GRAS (Generally Regarded As Safe) and can simply be run down a drain. if they used regular Ethylene Glycol, you should collect it, and take it in to your local recycling location.
 

tpenfield

Moderator
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Joined
Jul 18, 2011
Messages
17,621
Re: Draining the antifreeze from the motor

No need to do anything special. . . Summarize is just a term to make a simple thing sound more complicated. As Scott said, just running the engine as part of checking things out in preparation for the season will purge the anti-freeze.
 
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