Go Back   TeamTalk > Maintenance Tips, How-tos and Refurbishing Topics > General / Other

Reply
 
Thread Tools Display Modes
  #1  
Old 09-07-2004, 10:18 AM
PeteS's Avatar
PeteS PeteS is offline
TT Enthusiast
 
Join Date: Aug 2004
Boat: 1988 Prostar 190 - 351 Indmar (1:1) / 365 Hours
Location: Detroit
Posts: 399
Temp Gauge

Temp gauge is not working. It actually jumps up to around 130 when I fire the boat up, and then drops to 100 when it's operating. Seems odd. I've heard the operating temp should be 150 or so, so I'm assuming this 100 reading is false.

Anything jump out at anyone is quick fixes? Pulled the dash, and the wiring seems to be in tact all the way back to the thermostat. What next?

Thanks,
Pete
__________________
1988 Prostar 190 - 351 Indmar (1:1) / PerfectPass Digital Pro 6.5n, 13 x 12 Acme 3-Blade
Reply With Quote
  #2  
Old 09-07-2004, 10:45 AM
JimN's Avatar
JimN JimN is offline
MC Master Poster
 
Join Date: Jul 2004
Posts: 11,674
Next, check the wire to the temp sender. Sounds loose if it changes, or the wire has a break in it near the terminal. Could still be a bad sender, but the wiring should be checked before replacing anything.
Reply With Quote
  #3  
Old 09-07-2004, 11:09 AM
PeteS's Avatar
PeteS PeteS is offline
TT Enthusiast
 
Join Date: Aug 2004
Boat: 1988 Prostar 190 - 351 Indmar (1:1) / 365 Hours
Location: Detroit
Posts: 399
As always, Jim, you are a lifesaver. The sender, is that the unit located in the thermostat hole on the top of the block, drivers side? The wiring looked good coming from there, if I was checking the right place. Thanks again.
__________________
1988 Prostar 190 - 351 Indmar (1:1) / PerfectPass Digital Pro 6.5n, 13 x 12 Acme 3-Blade
Reply With Quote
  #4  
Old 09-07-2004, 11:39 AM
JimN's Avatar
JimN JimN is offline
MC Master Poster
 
Join Date: Jul 2004
Posts: 11,674
That should be it. It's about the same size(but not as long) as a spark plug with a tan or tan/black wire on it. Turn the key on and see if wiggling the wire changes anything.
Reply With Quote
  #5  
Old 09-07-2004, 11:43 AM
PeteS's Avatar
PeteS PeteS is offline
TT Enthusiast
 
Join Date: Aug 2004
Boat: 1988 Prostar 190 - 351 Indmar (1:1) / 365 Hours
Location: Detroit
Posts: 399
Great, we are on the same page. I tried wigglingt he wire with the ignition on, and didn't see any changes in the needle on the gauge. Possible bad sending unit?

Like I said, the gauge jumps to 130 during start up and then slowly falls down to around 100 after a few minutes. Thanks again.
__________________
1988 Prostar 190 - 351 Indmar (1:1) / PerfectPass Digital Pro 6.5n, 13 x 12 Acme 3-Blade
Reply With Quote
  #6  
Old 09-07-2004, 11:46 AM
PeteS's Avatar
PeteS PeteS is offline
TT Enthusiast
 
Join Date: Aug 2004
Boat: 1988 Prostar 190 - 351 Indmar (1:1) / 365 Hours
Location: Detroit
Posts: 399
If this is the right piece, looks like it's only $9.00 at DIM:

http://skidim.com/prodinfo.asp?numbe...item=4&mitem=6
__________________
1988 Prostar 190 - 351 Indmar (1:1) / PerfectPass Digital Pro 6.5n, 13 x 12 Acme 3-Blade
Reply With Quote
  #7  
Old 09-07-2004, 05:08 PM
acurtis_ttu
Guest
 
Posts: n/a
Just replace the sending unit. It is very cheap to replace, and only takes a few minutes. Make sure you don't over torque.
Reply With Quote
  #8  
Old 09-07-2004, 05:13 PM
PeteS's Avatar
PeteS PeteS is offline
TT Enthusiast
 
Join Date: Aug 2004
Boat: 1988 Prostar 190 - 351 Indmar (1:1) / 365 Hours
Location: Detroit
Posts: 399
Thanks for the advice. Does the above sending unit look like the right part?
__________________
1988 Prostar 190 - 351 Indmar (1:1) / PerfectPass Digital Pro 6.5n, 13 x 12 Acme 3-Blade
Reply With Quote
  #9  
Old 09-08-2004, 09:25 AM
Hoff1's Avatar
Hoff1 Hoff1 is offline
TT Enthusiast
 
Join Date: Jul 2004
Boat: MasterCraft, Maristar 210 openbow, 1990, 351W
Location: Lexington, KY
Posts: 478
Donít know how long you have had your boat, but mine had similar issues when I purchased it. I tried replacing the gage a couple of times, with no luck. I pulled the sending unit out, and tested it with a hair dryer. Thing worked without any issues. I was a little confused until I went to replace the thermostat. Found that the previous jacka$$, I mean owner, had removed the thermostat completely. Just a thought.
Reply With Quote
  #10  
Old 09-08-2004, 09:31 AM
PeteS's Avatar
PeteS PeteS is offline
TT Enthusiast
 
Join Date: Aug 2004
Boat: 1988 Prostar 190 - 351 Indmar (1:1) / 365 Hours
Location: Detroit
Posts: 399
Now that's a classic move, Hoff. Sorry to hear that, it makes me cringe to think that my boat actually may be running at 100 degrees.

I'll try the hair dryer trick. Just pull the sending unit, aim the hair dryer at the bottom, heat it up, and watch the temp gauge with the key on? How long do I have with the key on and the boat not running before I fry my electronic ignition?

Last question, and I know, I know, it's a dumb one. Where are both thermostats located to make sure my previous owner didn't do the same thing yours did? Thanks a million.
__________________
1988 Prostar 190 - 351 Indmar (1:1) / PerfectPass Digital Pro 6.5n, 13 x 12 Acme 3-Blade
Reply With Quote
Reply

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


All times are GMT -4. The time now is 07:03 AM.