Thread Tools Display Modes
Old 07-02-2013, 05:41 AM   #21
TF Site Team
Peter B's Avatar
City: Brisbane
Country: Australia
Vessel Name: Lotus
Vessel Model: Clipper (CHB) 34 Sedan/Europa style
Join Date: Jun 2008
Posts: 6,915
Send a message via Skype™ to Peter B
Originally Posted by Wxx3 View Post
Oh I forgot

the whole issue of standard deviation and what that raelly means in the manufacturing process
Not to mention the hysteresis loop - you must allow for the hysteresis loop....

Peter B is offline   Reply With Quote
Old 07-07-2013, 11:33 AM   #22
tpbrady's Avatar
City: Anchorage/Wrangell
Country: USA
Vessel Name: Silver Bay
Vessel Model: Nordic Tug 42-002
Join Date: Sep 2012
Posts: 523
A couple of observations, one is the temp sensor isn't all that accurate in some cases. I use an infrared thermometer that I shoot at the output of the heat exchanger. It generally reads about 170F while the temperature gauge reads 182 or so. I have looked at other portions of the block and cooling system and the temps are consistent. The second observation is as rpm increases so does the flow rate of cooling water. So in addition to the thermostat allowing more water through more water is being pumped through the system. Some outboards actually use a spring loaded valve to control cooling at high rpm as the increased water pressure opens the valve allowing more water through.


tpbrady is offline   Reply With Quote
Old 07-07-2013, 12:43 PM   #23
City: Carefree, Arizona
Country: usa
Vessel Name: sunchaser V
Vessel Model: DeFever 48
Join Date: Apr 2008
Posts: 6,826
Don't forget to consult your "book" for proper op temps as internet musings can be erroneous dependent upon year and engine mfr. On an idle comment basis, there are some engines that have more than one thermostat. A point to be remembered too is oil temperature best be in the 175- 180 F (or higher) range to keep the oil from becoming fuel (aka volatiles) and water contaminated.

sunchaser is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

All times are GMT -5. The time now is 10:20 AM.

Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012