Boats For Sale:
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1997nautique 
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Joined: July-06-2011 Location: Horace, ND Status: Offline Points: 40 |
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 Topic: Temp GaugePosted: September-15-2011 at 12:31pm |
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Temp gauge on my 1997 SK runs between 120 & 140. Put in a new thermastat & no difference in temp. I am thinking that it maybe is the temp gauge that needs replacing? What are your thoughts?
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8122pbrainard
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Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Posted: September-15-2011 at 12:46pm |
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I always promote testing before you just start throwing parts at it. An IR temp gauge reading at the sender would be a start. Then a resistance reading off the sender cold and hot. The sender is a 30 to 240 Ohm and the gauge range is very linear to the Ohm range.
Knowing your engine as well as what temp T stat you installed would help us. |
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1997nautique
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Joined: July-06-2011 Location: Horace, ND Status: Offline Points: 40 |
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Posted: September-15-2011 at 12:49pm |
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GT40 EFI put in the 160 degree thermastat.
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8122pbrainard
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Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Posted: September-15-2011 at 12:52pm |
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The 160 is correct. |
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scottb
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Joined: July-05-2006 Location: Bolingbrook, IL Status: Offline Points: 376 |
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Posted: September-15-2011 at 4:31pm |
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120 may be on the cool side, but 140 is normal.
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TRBenj
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Joined: June-29-2005 Location: NWCT Status: Offline Points: 21182 |
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Posted: September-15-2011 at 5:48pm |
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I sure wouldnt think so. I run a solid 150-160 on my carb'd 351w with a 143 stat. Theres nothing different about a GT40's cooling system, so a 160 stat should have it running between 160 and 180. |
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scottb
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Joined: July-05-2006 Location: Bolingbrook, IL Status: Offline Points: 376 |
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Posted: September-15-2011 at 7:07pm |
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My bad. You are right. 160 is normal for my boat, too. |
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mdvalant
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Joined: May-06-2009 Location: Bellevue, IA Status: Offline Points: 2059 |
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Posted: September-15-2011 at 8:01pm |
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No idea what stat was in our 90 but that thing would never run above 145 per the gauge anyways...
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hyparks
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Joined: October-04-2011 Location: Uk Status: Offline Points: 2 |
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Posted: October-04-2011 at 1:00am |
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Hi how did you get on with this problem?
I have an 01 210 with gt40 and I am having the same problem. Temp gauge not going above 130. Used to read between 160 & 170. Put new 160 thermostat in but still the same. I have earthed the signal wire to the gauge and the gauge works fine. How do I go about testing my sender? With the gauge reading below normal my Risers appear to be a lot hotter than normal. Could this be connected? Does anyone have a cooling system diagram? Thanks guys |
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8122pbrainard
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Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Posted: October-04-2011 at 8:44am |
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hyparks
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Joined: October-04-2011 Location: Uk Status: Offline Points: 2 |
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Posted: October-04-2011 at 3:05pm |
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I have sorted it. It was the sender.
I removed it and it was all coked up and the end that the wire connects to was corroded. I did a simple test to check its functionality. I earthed the thread to simulate it being screwed into the engine. Connected the signal end to the gauge then put it in some boiling water. The gauge stopped at 130. I then cleaned the entire sender with a wire brush and tried the test again. The gauge then went to 180 and stopped. So still not working fully so have ordered a new one. Maybe the original poster has the same issue. Thanks |
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1997nautique
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Joined: July-06-2011 Location: Horace, ND Status: Offline Points: 40 |
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Posted: October-07-2011 at 2:15pm |
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I replaced the sender. Now I get the temp up to 160 but thats it. So made some improvement but still not quite right.
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8122pbrainard
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Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Posted: October-07-2011 at 2:40pm |
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Have you Ohm'd out the sender wire. You could have some extra resistance. Connections especially the wiring harness plug at the engine can be a problem. I've seen them green (corrosion) inside. Also, have you checked the voltage you are getting to the gauge? Could be the same problem! BTW, I really don't feel the 160 is a bad temp. |
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Bri892001
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Joined: September-27-2008 Location: Boston MA Status: Offline Points: 4947 |
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Posted: October-07-2011 at 4:06pm |
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Pete, I was going to say the same thing on the 160.
The boat should not be getting any higher that anyway. |
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TRBenj
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Joined: June-29-2005 Location: NWCT Status: Offline Points: 21182 |
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Posted: October-07-2011 at 4:12pm |
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An EFI Ford (like a GT40) should be running closer to 180 with the 160 stat installed, if Im not mistaken. If its running a true 160, it wouldnt bother me too much, though. |
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1997nautique wrote: