Winterizing Merc 5.7 LT.

Kens242REGAL

Cadet
Joined
Oct 3, 2010
Messages
13
All new to this forum and to boats.


My boat has a 5.7 lt engine, 1999 REGAL Commadore. Today when I began searching for the engine drain plugs(blue in color) I located Port Side, from cylinder block and bottom of the exhaust manifold.

On the starboard side I located the y-fitting drain plug and also disconnected the red (hot hose) which I gather is the cylinder block drain as there is no plug in that spot due to plumbing.

I removed the four rubber hoses from the cooling system and drained as much water out of them by bending them over.


My question is, I helped another boater winterize his 5.7 lt. Year not known although also Merc Cruiser. He had five blue plugs. Now I realize in actuality I removed four when considering the hot water line. Have I missed a plug, and if so where will I find it?

In my owners manual someone has used it as a guild prior to my owning the boat. They have placed a question mark on C- water tube drain plug located on the Port side of the engine.

If you know, email me directly, I?d appreciate it!!

Thanks!
 

starcraft1982

Petty Officer 1st Class
Joined
Feb 7, 2010
Messages
277
Re: Winterizing Merc 5.7 LT.

When did they start making a 5.7L mercury/mariner OUTBOARD?!!!Really though,need to post in I/O forum for answers.
 
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