Go and mount some after market breathers on the valve covers and buy a locking dipstick !!!!

Thats normal ,,,nothing bad . Also u need to see 220 oil temp other wise u will have moister in the valve covers at all times !!!

I had the same thing,,stuck some Moroso filters on the valve covers ,,with a sponge inside of them and a locking dipstick ,,now its fine !!!:party-smiley-004:

Well, I did put an oil thermostat on the boat last season after the rebuild. My oil temp guage wasn't working but using an infared gun on the oil filter today showed 190ish. It's a 210 oil thermostat. I'm more worried about some kind of a water leak. I don't know if i would have room for the external filters. I have about 2.5 inches on one side, half that on the other. Stock 502 mpi.

The dipstick itself wasn't being pushed out of the tube, the oil was coming up and out of the hollow handle of the dipstick itself. What other dipstick should i get?

Gotcha,,,just clamp the hollow end on the dipstick SHUTT !!!

and i think your oil needs to be min 220 to get the moist out of the top end !!
If u have no water in the oilpan ,,then its fine (waterleak wise) !!

Ya really think oil should be going that far anyways, seems if it's doing that, crankcase is being pressurized. Also, if those breather lines are getting that amount of condensation in them, how am i supposed to keep it from plugging up the lines? What else can i use on the stock 502 mpi for breathers. I did find these (Moroso 68741) breathers. But don't know if i will have room for them. If only one side is vented, is that good enough?

Well i talked to the engine guy. He said the same thing as far as the oil temps go. I bought the oil thermostat from CP and i believe it was a 212 degree. Also, engine guy said my method of teeing the crankcase vent lines together and going to the intake is not adequate. He wants me to go to individial breathers as well. Not sure what to do about the thermostat.

Well i went to the boat to reevaluate the breather system. I also went one step further and pulled the spark plugs to check them out. 3 out of 4 of the port side had water droplets on the plugs. One plug also had rust inside at the bottom going around the insulator. Another had a couple of tiny little rust spots going around the end by the electrode. The other plug on that side was perfectly dry and normal looking. I pulled the starboard side, and all the plugs looked normal, no water at all. So what's going on here. Am i still chasing a bad breathing system, or do i have other problems with a bad gasket or leaky manifold?

Now i think u have other problems that actually cause the pressure problem !

:eek:

Could be, but what's the culprite........

Like I stated earlier you need to open the oil drain plug to see if you have water in your oil.If it has set for a few days the water will go to the bottom and will come out first when you open the plug.Have you changed your breather setup from stock?Mercury has thousands of these engines out there and they certainly aren't having breather problems with them.If you have changed it you should return it to stock!

I agree ,,if its a stock engine .

But this motor has only dyno time and is rebuild ?????

Rebuild to what ?? 30over ??? different cam ???
Or stock freshened up ,,just with new bearings ????
Also WHO rebuild it ???

To many things going on for a bone stock fresh rebuild motor !!:eek:


OH,,,i do agree on the oil draining thing tough.....u should do that ,,to find out about the water thing !!!!!!!!!!!!!!!