I have not pulled the plug, but i could certainly do that. I will note that the oil level in the pan has not gone up , maybe down a tad from loosing it out the dipstick.

When i first bought this boat, it already had the eddie marine flame arrester with a k and n element in it. The flame arrestor has a hose barb on the back. The starboard valve cover had a fitting and hose that went to that hose barb. The port side breather had the mercruiser little baffle that just butted up to the flame arrester element. I changed this to the system i am currently running after i saw some oil or gunk coing out of the merc part and splattering around. I don't exactly recall the time line of when i had changed the breather system, and had this problem before the engine rebuild. I could put it back to the method stated when i bought the boat. But now i may have uncovered another problem with the plugs having condensation/water on them.

I think there is a problem and its not the breathers !!!!
That is why u are not burning the moister in the valve covers out and that is why the breather system gets cloked up and then over pressurizes the crankcase and pushing oil out of the dipstick !!!

But hey ,,thats only what i am guessing !!!!:party-smiley-004:

I take it back. I remember how the breather system is now. I have the parts diagram to remind me. The starboard side has a elbow fitting in the valve cover, and a hose going to the port side where it plugs into the breather baffle. The breather baffle plugs into the port side. Then there is a short 2 inch piece of hose that butts up to the flame arrestor. There was a plug on the eddie hose barb. The original flame arrestor had a hose barb within close proximity to the breather baffle. With the eddie system, the hose would have to be about 6 inches or so.

Don't know, could very well be an issue. The motor builder wants me to have all the plugs out, and turn the motor over with the starter to see if any of the cylinders kick out any water. Not exactly sure what he is looking for there, especially after telling him about the rusty plug.

Leaky head gasket or cracked head.

Or bad/leaking exhaust manifold will put water on the plugs but least likely in this case. Or bad intake manifold or gasket.

why do you think the manifold would be the least likely case? I guess the thing that get's me, is why only the 3 out of 8 plugs, and just on the one side. I'd think if the intake was bad, it would be all plugs, and the crankcase would be filling with water as well.

Well, the boat is going to the shop saturday. The first thing they will be checking is the Impco powerflow manifolds, they will be sent to the factory for pressure testing. Also, they will be checking the riser gaskets that they installed to see if they were leaking; also the riser flanges for warping. That's the first step, and go from there. I'll keep ya all posted.

didn't read anyone else's answer but check an make sure someone didn't stick in an automotive PCV valve, happens everytime when they use them

I did the breather system. There is just a couple of plastic elbows there now. I'm not sure how the breather system would effect 3 out of 8 spark plugs though. What are you getting at?