[C320-list] Overheating Problem

[Rick Onyshko]

Thanks to all, I had good water flow, strainer and intake were clear, I do run a coolant water mix, I will pull the thermostat and check it seems like it might be the problem.  Also thanks for the input to all on the operating temp, I did not notice the overheat temp when the alarm went prior to shutting it off, but it seems like it consistently ran 150, so I won't be concerned if it runs up to 160 or 170.  Will post what I find if anything.
 
 Rick

----- Original Message ----
From: David Cardoza <dave at avaloncon.com>
To: Rick Onyshko <rick_o at ameritech.net>; C320-List <C320-List at catalina320.com>
Sent: Monday, June 5, 2006 8:57:29 AM
Subject: Re: [C320-list] Overheating Problem

I think most of the thermostats on these motors are 180F so temp runs +/-
180F typically.  But some time ago when talking with the local Yanmar
distributors' service person I remember him mentioning that a 160F
thermostat existed for these motors sounds like you may have one(came up
when I was leaking coolant through the sensor, what a mess).  Hence the
+/-160F 150F-170F.  Only one way to find out but it's messy and may not be
necessary (remove it and read the markings).  But if your running cooler vs
hot > 190F don't know what I'd do if I was in your shoes.  Sounds like you
fixed the real problem with the new Impeller.

-----Original Message-----
From: C320-List-bounces at catalina320.com
[mailto:C320-List-bounces at catalina320.com] On Behalf Of Rick Onyshko
Sent: Sunday, June 04, 2006 7:55 PM
To: C320-List
Subject: [C320-list] Overheating Problem

I have a 3 year old Yanmar 3YGM and had an overheat alarm go off on my first
trip after the winter.  I replaced the impeller, no missing vanes.  It
seemed to run at normal temp ~ 150 for over an hour.  Today I took it out
and had it idling while I dropped sails and put fenders out, and it did not
overheat but the temp went up to about 170.  Returned to 150 when I started
moving forward and the RPM went up.
 
 Not sure if anyone has any ideas or suggestions, it has typically run right
at 150 pretty consistently.  
 
 Thanks
 
 Rick