[C320-list] 320 #047, raw water discharge temp

[Jane & Ken]

Don, Has the engine overheating been related to the exchanger tubes or perhaps 
the raw water pump vanes. The rubber vanes are critical and must be inserted 
correctly.  Also the thermostat on my perkins was a 192 degree, which is not far 
from the 200 degrees you are reading.  Does the high temperature alarm sound at 
200?  How many hours on the engine?





________________________________
From: Don Poole <dpoole15 at gmail.com>
To: "c320-list at lists.catalina320.com" <c320-list at lists.catalina320.com>
Sent: Sun, November 25, 2012 8:59:43 PM
Subject: [C320-list] 320 #047, raw water discharge temp

Anyone know what the temperature differential between the raw water outlet and 
the inlet (sea) water should be? Having overheating problems with my Perkins M30 
(running at 200F).  I'm only seeing a 12F temp rise from inlet to outlet when 
engine is fully up to running temp; unfortunately now 200F. (Measuring with a 
cup and an infrared temp gauge. inlet 68F outlet 80F).  I was expecting a higher 
outlet temp. Raw water discharge flow seems to be fine. Previously I had 
thoroughly cleaned heat exchanger tubes (internals) and tube bundle exterior and 
tested thermostat for proper opening. Used infrared temp gauge to read temp in 
area near temp probe and it appears that temp gauge is reading correctly. 
Welcome any ideas and experience!