Go Back   Maxum Boat Owners Club - Forum > Maxum General > Engines
Click Here to Login
Register FAQ Community Calendar Today's Posts Log in

Reply
 
Thread Tools Search this Thread Display Modes
 
Old 07-26-2020, 02:34 PM   #1
GTM
Ensign
 
Join Date: Apr 2019
Location: England
Posts: 3
Default Temperature gauge issues - 2300SC 5.7L Mercruiser

Has anybody have any experience with the temperature gauge over-reading?

We took it out last week and ran the boat at about 25Knts and the temperature gauge was reading nearly 250F (seemingly very hot but the engine sounded fine). At the same time we were monitoring the head temperature with an infrared sensor about 6" away which never went about 160F wherever we aimed it.
There was a very small amount of water bubbling out of the radiator cap as well.
The question is : Is the engine really overheating or not?

Footnote: We have recently had a new impellor and a new thermostat installed.

Garry.
__________________

GTM is offline   Reply With Quote
Old 07-26-2020, 03:07 PM   #2
Admiral
 
mmwjr's Avatar
 
Join Date: Feb 2012
Location: Essex, Maryland
Posts: 10,606
Default

So you have closed cooling; correct? Being that the IR sensor never read above 160* I suspect the helm gauge isn’t reading correctly. Under Documents of this site you will find the Mercruiser manual for your engine and it will tell you how to test the helm hand sender. The alarm should sound at 200* as well.
__________________

__________________
1997 Silverton 362, 7.4 Crusaders
1997 2400 SCR, 5.7 Vortec / Bravo 2

Mike
mmwjr is offline   Reply With Quote
Old 07-27-2020, 10:09 AM   #3
GTM
Ensign
 
Join Date: Apr 2019
Location: England
Posts: 3
Default

Quote:
Originally Posted by mmwjr View Post
So you have closed cooling; correct? Being that the IR sensor never read above 160* I suspect the helm gauge isn’t reading correctly. Under Documents of this site you will find the Mercruiser manual for your engine and it will tell you how to test the helm hand sender. The alarm should sound at 200* as well.
Thanks Mike, I'll try that.
GTM is offline   Reply With Quote
Reply


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


Powered by vBadvanced CMPS v3.2.3

All times are GMT. The time now is 11:32 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2024, vBulletin Solutions, Inc.