T&T: Engine temperature

[tands]

On Sat, 2 Aug 2008 15:35:42 -0400, SID RUBIN wrote
> I need feedback from the list on an recent observation.  Albin 40 
> with twin 135 Lehman's.  Owned boat for three years and always run 
> at about 1700-1800 rpm.  Average SOG 7.75kts.  The temp gauges 
> typically report 165-175 degrees. Yesterday I cranked rpm's to about 
> 2250 and after about 10 minutes noticed the starboard gauge reading 
> about 225 degrees.  Port remained at 175.  Should I be concerned about what 
> this event may be telling me?  What should I do to further investigate?

Sid,
It sounds like you have an obstruction somewhere in your cooling loop. Check
your sea strainer and raw water filter screen. How old is the impeller on your
raw water pump? Has it been replaced lately? Take off the end cap on your heat
exchanger and see if it is full of crud or pieces of impeller?

Ted G.
DeFever 44, Amici
Block Island, RI