07 GTX 155 sat two years Water in oil

[MyGeaux]

Hello all, please help:

Was just given an 07 GTX 155 4 Tech by a friend who bought new, barely used it, and then let it sit a couple of years. Not a mechanic but do maintain two boats and have a friend who builds race engines but does not know Sea Doo’s. Though this would be, and is, a great project for my sixteen year old son and myself, however, we have been stumped.
Knowing it had been sitting for so long we immediately

Drained fuel
Changed spark plugs
Changed oil and filter
Put in fresh fuel

She started right up on quick connect. Note...very aware that engine needs to be started prior to adding water as well as stopping water before killing engine. Should not run more then a few minutes, which is what we did.
Excited we took it to the launch and I idled out to the river, with the occasional bump of the throttle, again excited as it was very responsive.
Throttled down to take off, it gladly accelerated immediately, and just as quick sounded the never ending beep with the oil symbol, on lower left of display (Did not see that at first as display is kinda dim. Remove key alarm stops, starts right up, idles perfectly. Repeat scenarios three times and then with glasses see the oil symbol.
Idle back to dock, check oil, and it is milkshake. (Chased this problem on my 525efi and finally found inversion from the broken flaps)
Have drained oil and pressure tested the cooling (antifreeze) system and that is fine.
Pressure tested the cylinders and all were 150
According to my mechanic friend who helped me with the cooling system check, performed by vacuuming one line and plug on the other, if there was a leak internally on the oil cooler, then pressure would have not been held.
Where else can water come from? His theory was that all that sitting over a couple of years could have allowed internal moisture to build up, however, when we drained the sitting oil, it looked crappy but did not have water in it. At a loss and appreciate any and all help. Thanks!

 

[MacSeaDoo]

If the coolant is fine the only other other system is the raw water manifold jackets and injection into the exhaust. This would have to be a crack or leak in the exhaust manifold for it to make its way down into the exhaust side of the engine.

 

[MyGeaux]

Forgive me, do not know SeaDoo’s. On my 525 big block it has headers, with gasket between header and big block. Is there a similar setup on the GTX?

 

[MacSeaDoo]

Your exhaust manifold is like any other manifold. It is bolted to the engine but has passageways to cool it with raw water. The water comes in one point and leaves the other point.

If the manifold has a crack, water can leak down into the exhaust area and enter the cycle though an exhaust valve.

It sounds like to me though that this may not be the case for you considering how quickly your oil went milky.

Questions:

1.. what color is your coolant and has the coolant level changed?
2.. you mentioned your oil was milky but did the oil level change?
3.. when you originally changed the oil, what did it look like?

As mentioned it is either water or coolant. If it is not coolant, it is water. If it is water it would be coming from the exhaust system because that is the only system that brings water into the boat unless there is water in your hull already.

Typically if it is the exhaust manifold, a cyl gets flooded the boat either will not start or it bends a rod in compression. That doesn't sound like your scenario if you have run it.

I would guess it is either:

1..Coolant and you have a leak.
2..It is residual and if you change the oil again it will get better.

BTW, you can run the ski on the hose to take the cooling risk away when on the hard. Might be easier to troubleshoot a water leak that way because the hose pressure even at idle simulates more or less the pump pressure for the water at cruising speeds.

 

[MyGeaux]

The Copland remained at level and was green, till I emptied it and vacuum checked the system.
The oil level raised a good bit and looked like a chocolate and vanilla milk shake. Note, did not check after changing the original and used the pre made oil kit from sea doo which I believe was 3 1/2 quarts, whatever came in the pack.
the original oil looked dark, but not black, and like oil that has been sitting for a long time.
Also note that when I drained the oil for original change, did not put the nose of the ski down, nor did I depress throttle and start for ten seconds, without actually starting it. Since draining the milk shake, learned of this technique, lowered nose and a lot more came out.
Is it possible that there was residual moisture at the bottom that I did not get out on initial draining, prior to knowing about lowering nose and starting for ten seconds?

 

[MacSeaDoo]

It is possible.

That much water could not enter the engine through the exhaust without causing the engine to quit as the only entry point would be through an exhaust valve and into the cyl. When the engine is running there would be back pressure pushing it out of the manifold.