Drain Plugs

jacktm

New Member
Oct 16, 2006
175
ny
Boat Info
boatless
Engines
boatless
I have a 2006 mercruser 350 MPI I can find where to replace to 2 front drain plugs. Can't find the others. I believe there are 2 more.

The owners manual didn't really help

Thanks Jack
 
Are you referring to blue plastic plugs and O rings for a closed cooling system?
 
Look in the owners manual, under "Winterization", and it will show the locations.
The following is based upon a 5.0, closed cooling, with Bravo 3. The 350 should be very similar.
Facing the front of the engine, if I remember correctly, 2 plugs are on the left, at the water pump assembly, one in front, and one on the side, and is hard to see. I used a flashlight and mirror.
Also, one plug is on the right, at the base of the fuel filter/cooler. Also, one plug, is at the top of the heat exchanger, which is removed to vent for draining, for a total of 4 plugs.
Hope this helps...
 
did you get the engine/drive CD rom with the boat?

if not you may want to call up Mercruiser and ask them for
a CD rom manual, I believe there is more on there.
 
Thanks for the help, I will look at the CD and search with the mirror
 
I noticed you didn't say you have closed cooling, but some of the replies are talking about closed cooling.

I don't believe the closed cooling systems have that many plugs. If you just mean the drain plugs, be sure that's what you're looking for so as not to get them confused.

FWIW, they are NOT always very easy to get too. To get 2 of mine, I have to remove the risers to be able to lay on top of the motor and reach far enough down to get them. Luckily SM risers are a breeze to remove. Previously I'd end up head first in the bilge with a fear of getting stuck! :grin:
 
I found them the marina disconnected a few of the quick disconect lines from the sea water cooler.

Thanks for all you help

It goes in the water tomorrow
 

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