Manifold drain????????

[Lodgepole]

I have a 92 OMC 3.0 HO. When I remove the manifold drain plug and even remove the drain fitting, even after punching wire in the opening, I can't find any kind of hole. It just feels like a smooth flat surface inside the hole. I always put antifreeze in the manifold and block, so no problems. I would guess that the manifold casting was never drilled out where the drain hole is.

Has anyone ever run into this?????

 

[bruceb58]

Re: Manifold drain????????

Why not just pull the hose that comes from the thermostat to drain the manifold? The hose enter the manofold at its the lowest point right?

 

[Lodgepole]

Re: Manifold drain????????

The hose is on an elbow. Top of elbow is highest point. Even with the elbow out, I doubt if it would be lowest point. Antifreeze poured into the elbow takes the worry out of the winterize.

 

[ErieRon]

Re: Manifold drain????????

Any way to fill the manifold with something to confirm that there was never a hole drilled? I don't know anything about OMC, but in my line of work, I run in to that kind of crap all the time. Or, is it possible that where you are sticking the wire in, there is a baffle plate or elbow that feels like it's a dead end?

 

[bruceb58]

Re: Manifold drain????????

The hose is on an elbow. Top of elbow is highest point. Even with the elbow out, I doubt if it would be lowest point. Antifreeze poured into the elbow takes the worry out of the winterize.

Makes sense!