[C320-list] Engine and Reefing Questions

[Stanley Rogacevicz]

Joe,
   The only time I noticed steam (a 5' long trail) along with a limited water flow was when the strainer was totally clogged with a hand full of sea weed or eel grass with my '99 Yanmar. That happened to me 3 or 4 times but I think I only had the 'high temp' alarm go off once. My normal temp was always very close to 180.
Stan

>>> "Joe Barrett" <joe at dolphinmortgage.com> 5/15/2007 9:24 AM >>>
I always have a bit of steam coming from the exhaust. Good water flow and
temp round 160-170. Is that normal to other boats that have the 3GM30F
Yanmar?
Joe Barrett 


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Dolphin Commercial
Joseph T. Barrett jr.
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joe at dolphinmortgage.com 
9010 Strada Stell Court
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In The Vanderbilt Galleria behind Sanibel Steakhouse
tel: 239-597-2266
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-----Original Message-----
From: c320-list-bounces at catalina320.com 
[mailto:c320-list-bounces at catalina320.com] On Behalf Of Larry Frank
Sent: Monday, May 14, 2007 10:51 PM
To: 'C320-List'
Subject: Re: [C320-list] Engine and Reefing Questions

Mike,

I concur with the others that the steam is probably not a serious long term
problem.  Make sure you now have good water flow out the exhaust and you can
be fairly sure the impeller is good and there is not any thing plugging the
inlet.  Actually, under the right conditions steam would be normal.  Take a
pot of water heated to 160-180 degrees outside on a humid day and you will
see steam.  I am willing to bet that is what you saw.  I have had the same
experience and always look at the exhaust water flow and if its good and the
engine temperature is normal don't worry further.

Larry
WindSwept C320 #246



-----Original Message-----
From: c320-list-bounces at catalina320.com 
[mailto:c320-list-bounces at catalina320.com] On Behalf Of mike hunter
Sent: Monday, May 14, 2007 2:32 PM
To: C320-List
Subject: [C320-list] Engine and Reefing Questions

I'll start by saying I love this boat!  I have a couple of questions
regarding engine temperature and what looked like steam coming out of the
exhaust, but I'll get back to those in a bit.  
   
  Friday afternoon we fueled up and went for a little cruise around the San
Diego bay, running the engine at different RPMs.  We found another 'sweet
spot' at 2800 and kept it there for roughly an hour.  The engine stayed at
its normal operating temperature of just a hair below 180 degrees.  
   
  Saturday morning we motor sailed to the mouth of the bay (~ 45 min.) and
then proceeded to have a fantastic day of sailing.  It always feels so good
to shut down the engine J.  That evening while coming in, we started the
motor and motor sailed through the bay to the no wake zone then dropped the
RPMs down to around 2000.  It was shortly after doing this my Wife noticed
the temperature had risen to just a hair above 180 and there was what looked
like steam coming out of the exhaust with the water.  She dropped the RPMs
down to 1200 and I went below to check out the strainer.  The strainer had
accumulated a little bit of debris but it was mostly clear.  When I came
back up the temperature had dropped back down to normal and the 'steaming'
had stopped.  It almost seemed like we sucked up something and then blew it
out??? 
   
  My plan now is to clean the strainer, check the flow through the intake
hose and inspect the water pump impeller - which I replaced 2 weeks ago.  
   
  Finally, my engine questions:
   
  -         What is considered 'hot' for a Yanmar 3GM30F?
  -         Does the engine shut down when it reaches a certain temperature
to prevent damage?
  -         Am I on the right path or is there something else I should look
at?
   
  I also have a more important sailing question.  The wind varied from 8 -
12 knots throughout the day and the boat sailed beautifully.  At what wind
speed do most of you reef?  
   
  Thanks!
   
  Mike
  #637

       
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