[C320-list] exhaust mixing elbow

[Jack McDonough]

3200? Holy cow. I never run mine more than 2500 or so. Isn't 2500 the 
recommended RPMs for that engine? (i.e a Yanmar 27)




----- Original Message ----- 
From: "Crosby Roper" <vmdatsea at hotmail.com>
To: <c320-list at catalina320.org>
Sent: Friday, September 19, 2008 2:41 PM
Subject: [C320-list] exhaust mixing elbow


Thought I'd pass this along for general lesson learned file. In july on my 
way back from Catalina island to San Diego, I noticed that when I ran the 
RPM's up to 3200, I got a bit of black/brown smoke from exhaust. Since water 
tanks were full and there was a bunch of stuff on board, I figured probably 
just overloading the engine was the problem. On my next trip to catalina on 
Labor day, I noted smoke at 3000 RPM. To make a long story short, the 
problem progressed rap[idly over the next 30 hrs of engine use to the point 
where even at 2000 RPM i was seeing smoke. We limped back to the slip and 
called mechanic ( to whom I had spoken while in Catalina and who had advised 
me that problem was likely a clogged exhaust mixing elbow and OK to run 
engine at low RPM as long as it was not producing smoke.) He came out on 
Monday and problem was indeed exhaust mixing elbow. The engine is 3 years 
old and has about 220 hrs on it. He admonished me for not using the boat 
enough (in front of my wife, which should work out well for future sailing 
schedule) and for babying the engine. So, for anyone else who tends to baby 
their diesel, run it frequently and run it hard. But we already know 
that!Crosby Roper, VMD
Tethys # 1054
_________________________________________________________________
See how Windows connects the people, information, and fun that are part of 
your life.
http://clk.atdmt.com/MRT/go/msnnkwxp1020093175mrt/direct/01/=