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Re: purging water from the 496 cooling system
Originally Posted by bcolmsted
This year after purging all water out and pulling the blue plugs,and them reinstalling them, I ran rv antifreeze with ear muffs and then just left it in there.Won`t be a dry start next year..its good for -18.
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Re: purging water from the 496 cooling system
Originally Posted by Sydwayz
5 total blue drain plugs per engine.
2 on water pump assembly. I found the 2 on the pump and 2 on the other side, one forward, one aft, down low- where's #5? |
Re: purging water from the 496 cooling system
I still run AF through the system too. I use the method mentioned above early and late season when I am still using the boat but the temp may drop below freezing for SHORT periods.
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Re: purging water from the 496 cooling system
Originally Posted by Cattitude
I found the 2 on the pump and 2 on the other side, one forward, one aft, down low- where's #5?
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Re: purging water from the 496 cooling system
I don't remember off the top of my head, but I am almost positive there are 5.
I may very well be wrong. Perhaps Dave M can check. My boat is put away. www.mercruiserparts.com |
BTT any new info on this?
Ill be winterizing my new to me 496 twin this year. |
Originally Posted by QWKRN U
(Post 2257931)
BTT any new info on this?
Ill be winterizing my new to me 496 twin this year. |
Even though the heat exchanger is supposed to self drain when the valves are opened some have reported freeze damage regardless. Flush with anti freeze or blow out this item to be safe. $800/unit!
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Im just preparing for later. Im not gonna be winterizing it yet. Ill be boating til at least the last week of October. Then itll be time to put it away for a few months. Should get her back out around Mid March.
Originally Posted by Cattitude
(Post 2258111)
Wayne, there are I think two blue plugs on the OB side of the engine you will never reach. Purge as described, then pour in some RV antfreeze from somewhere to help with any remaining water- do this AFTER you verify the purge valves have closed- if I remember, they can stick in the open position- we've got at least 6 more weeks of boating to go-
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BTT
Did the airpump deal and per the recommendation from a local merc mechanic pulled the blue plugs on the cool fuel and raw water pump. Question is... How many Blue plugs are there and where are they located? |
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