Take a look at this gasket. 2.5 merc

[dondante]

Does this look suspect to you?

https://drive.google.com/file/d/0B-0DndFImDKyd0t4SjF6MUF3TTg/view?usp=docslist_api

[stoker2001]

Pulsing a little water where it shouldn't be?

[dondante]

Yup. Was getting water in #6 and sludge slightly around #4. That looks burnt and it looks as if it wasn't sealing. Broke off when I pulled the plate and looks as if water had been running through there. It's cleaner with no carbon deposits or gunk like the rest of the areas.

[stoker2001]

pretty uncommon for gasket to fail like that..

[dondante]

There was an old water pump impeller blade stuck in the actual cast water jacket passages. Only thing I can figure is that side of the manifold got hotter than the rest. The rubber blade was stuck towards the top stbd side. Maybe? Not sure.

Look here

https://drive.google.com/file/d/0B-0DndFImDKyZGhCcldIeldPVGM/view?usp=docslist_api

[TEXAS20225]

i popped my promax with a divider gasket that did the exact same thing, put water in 5&6 had 30lbs more compression in bottom two holes i had to have bored .015 over both holes

[dondante]

i popped my promax with a divider gasket that did the exact same thing, put water in 5&6 had 30lbs more compression in bottom two holes i had to have bored .015 over both holes

Did you ever figure out why it happened? Did the gasket looked burnt and deformed at the same lower passages? Odd. I think the impeller restricted the flow and caused mine. Not sure.
Guess il replace regularly. Lucky I found it in time.

I still haven't been able to run in the Greek since replacing. Only ran on water hose and backed in the water on the trailer. No water yet.

[TEXAS20225]

mine just came apart it took a small section out of that area about 1/4" wide

[Hirk]

I had gunk ouzing around the bottom of 6 and had to pull the cover anyway as I suspected a blockage due to it running hot and the gasket was not sealing well along the bottom.

[dondante]

Also found a dirt dobber nest blocking the hose from the poppet valve. I suspect that helped raising pressure through those holes and contributing to the leaking gasket. Along with the blade stuck in the jacket also. What a mess. Luckily no damage yet. About to go run it.

[Hirk]

Also found a dirt dobber best blocking the howsw from the poppet valve. I suspect that helped raising pressure through those holes and contributing to the leaking gasket. Along with the blade stuck in the jacket also. What a mess. Luckily no damage yet. About to go run it.
Ya I found 2 chunks of impeller and a piece of wood all in one passage. I took a plastic tube and blew into all the passages as well as stuck cinch ties into them, thats how I fished out the wood and would have never know it was there.

[dondante]

Good idea. I'll try that when I replace the gasket that's supposed to be on there. Dealer only had a promax gasket. Had to trim it a little to make it fit. I ordered a new gasket. Just got back from a 10 mile trip. Going to pull plugs and check it. I pulled them out after 1 mile and all seemed fine. Now to See how it held up after a long run.

[dondante]

All is clean and clear! seems to have been the problem. Stoked!! :cheers: