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captainTBcaptainTB Member Posts: 5 ✭
in Generator Discussions
My 1998, 266 with 7.4; B-3 temp is not showing the temp. Had thermostat replaced in spring, worked fine. I got stuck in shallow water one afternoon temp came up after being pulled off the sand. A few days later no temp...new thermostat, still no temp reading. Any thoughts will be greatly appreciated.
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    raybo3raybo3 Administrator Posts: 5,459 admin
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    A thermostat will not cause this problem. One of two things, either a bad sending unit or a bad gauge. To check the gauge go to the sending unit and take the wire off of it and hold it to ground and see if the gauge pins all the way up. If not its the gauge. If it does then its the sending unit. Hope this helps.
    2002 342 Fiesta Vee PC Point Of Pines YC Revere MA. popyc.org     raybo3@live.com
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    aero3113aero3113 Member Posts: 8,810 ✭✭✭✭✭
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    It’s possible that the wire came disconnected either on the sending unit or the gauge.
    2008 330EC
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    captainTBcaptainTB Member Posts: 5 ✭
    Where is the sending unit located?
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    raybo3raybo3 Administrator Posts: 5,459 admin
    This is what it should look like:SIERRA Temperature Sender - CrusaderMercruiser West Marine                                                                                                                                                                    It should be in this area but may vari:Coolant temperature sensor checking WITHOUT REMOVING IT - YouTube
    2002 342 Fiesta Vee PC Point Of Pines YC Revere MA. popyc.org     raybo3@live.com
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