As per my previous post questioning my temperature gauge initally reading 150 on
first couple of outings and then falling and staying at 100 degrees the last
couple of outings. The reply stated possible stuck open thermostat. I have a raw water
system and my web search on marine water cooling systems do not describe a thermostat
in a raw water system. I'm thinking that I had a possible clog and by running the boat
a few times I forced it out and that 100 is normal??

larry

Or you had a chunk of old impeller partially blocking the flow that is now
lodged in the t stat holding it open....


"Larry Crowe" wrote in message
...
As per my previous post questioning my temperature gauge initally reading
150 on
first couple of outings and then falling and staying at 100 degrees the
last
couple of outings. The reply stated possible stuck open thermostat. I have
a raw water
system and my web search on marine water cooling systems do not describe a
thermostat
in a raw water system. I'm thinking that I had a possible clog and by
running the boat
a few times I forced it out and that 100 is normal??

larry

Raw water cooling systems still have thermostats. I missed your previous
post so I don't know what engine you have.

"Larry Crowe" wrote in message
...
As per my previous post questioning my temperature gauge initally reading
150 on
first couple of outings and then falling and staying at 100 degrees the
last
couple of outings. The reply stated possible stuck open thermostat. I have
a raw water
system and my web search on marine water cooling systems do not describe a
thermostat
in a raw water system. I'm thinking that I had a possible clog and by
running the boat
a few times I forced it out and that 100 is normal??

larry

On Mon, 26 Jul 2004 20:21:28 +0000 (UTC), (Larry
Crowe) wrote:
As per my previous post questioning my temperature gauge initally reading 150 on
first couple of outings and then falling and staying at 100 degrees the last
couple of outings. The reply stated possible stuck open thermostat. I have a raw water
system and my web search on marine water cooling systems do not describe a thermostat
in a raw water system. I'm thinking that I had a possible clog and by running the boat
a few times I forced it out and that 100 is normal??
===========================

100 degrees is way too cool and will lead to excessive engine wear. A
raw water system for sal****er usage is normally set up with a 145
degree thermostat and that's about where your operating temperature
should be. If you boat exclusively in fresh water, a 160 to 170
degree thermostat is normally recommended.