Starboard Engine Steaming

[mitchconsult]

no, litterly looks like it came out of the box

[mitchconsult]

Chris,
did not check the key, but its an excellent idea.
it has to be waterflow, so it very well could be it, never thought to look at it

[Captain Bill]

The key might be a problem, but you could also have gotten a bad impeller. I once got one for my genset. It was pumping some water when It was first put in but in less than an hour of run time it stopped. I opened up the pump and it looked just fine, so I started looking for blockages, etc. I was beating my head against the wall trying to figure it out, so I finally took the pump apart again trying to figure out what was going on. I spun the shaft and noticed that the vanes were not turning at the same RPM as the shaft. The bond between the rubber part of the impeller and the metal hub had failed. Thankfully I had another one, put it in and all was fine. You would think that for $50 for a little piece of rubber and metal they could get it right, but not always.

[foggysail]

Originally Posted by mitchconsult

yes, maintaining coolant and has good flow.
Im starting to think there is an internal problem, it is a new rebuild, but it would not be the first time something was not put back together right

Why???? First, the engine is NOT overheating. Next, the coolant level remains constant.

WHAT MORE DO YOU WANT FROM YOUR ENGINE??? I would no worry at all. There is another thing that will yield water vapor in the exhaust, that is operating the boat in cold waters.

Could it be that you're seeing smoke from oil getting into the combustion chambers and not steam--- and yes, we understand on cannot see steam, we see water vapors.

[foggysail]

Originally Posted by djmarchand

You have twins, right? Put a bucket under the exhaust and catch the water on the port engine at 2,000 rpm and time how long it takes to fill. Then do the same thing on the starboard. If there is a significant difference, that is your problem- low raw water flow.

I realize that you say that you replaced everything in the raw water circuit. But if one side pumps x and the other side pumps 1/2 x then you have to look for why.

David

Low raw water flow will affect the the heat transfer in the heat exchanger causing the engine temperature to rise. His engine operates at 160F. I think he is seeing smoke from oil, not vapor from water but who knows

[perchance]

You mention a rebuild. If it was a complete rebuild it may run a little hotter during the initial break in period and consume a little oil till the rings bed themselves in.
I would run it as is but keep an eye on it.