draining Mercruiser 165 manifold

M

marvinjansen

Petty Officer 1st Class
Joined
Jan 10, 2010
Messages
278
Where do I drain the manifold on my 1973 Mercruiser 165 in an Aristocraft 19. I see large plugs on the sides and there are some small (maybe 5/16) bolts on the bottom. Do I just remove the small bolts on the bottom or the larger plugs (look like a 1/2" square hole)?
 
Bondo

Bondo

Moderator
Staff member
Joined
Apr 17, 2002
Messages
70,524
Re: draining Mercruiser 165 manifold

Ayuh,... Is this a 165hp 6 cylinder or 4 cylinder,..??

If the 6 cylinder, there should be a pipe plug drain on the Very Bottom of the manifold,...
Just above the Block's drain....
 
M

marvinjansen

Petty Officer 1st Class
Joined
Jan 10, 2010
Messages
278
Re: draining Mercruiser 165 manifold

It's the 6 and I found it. Took 7/16 wrench and a mix of antifreeeze and water and maybe oil came out. If I run the engine on the muffs I figure I can drain the manifold and block and be ok for the rest of the winter. What do you think? It is 70 now but will have more winter to come in Tuscaloosa, Alabama.
 
Bondo

Bondo

Moderator
Staff member
Joined
Apr 17, 2002
Messages
70,524
Re: draining Mercruiser 165 manifold

If I run the engine on the muffs I figure I can drain the manifold and block and be ok for the rest of the winter. What do you think?
Click to expand...

Ayuh,... And pull the Big Hose off the circulating waterpump,...
It's hidin' about another Quart...
 
You must log in or register to reply here.
Top