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Old 15-10-2013, 13:40   #1
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Westerbeke 7.8 kW gen set water temperature gauge

The water temperature gauge on my Westerbeke 7.8 BDT stopped functioning. I figured it had to one of two things, the gauge or the sender unit. Replace the gauge first (easiest to get to) and that didn't do it. Next I replaced the water temp sender unit, the single wire one because I think the two wire sender is the auto cut off when it gets too hot. That didn't do it either. Now I am stumped. Should there be a voltage on the single wire between the sender and the gauge? Any other suggestions? Gen sets is running fine, just not registering the water temp.
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Old 16-10-2013, 06:22   #2
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Re: Westerbeke 7.8 kW gen set water temperature gauge

See ➥ Basic Engine Gauge Theory and Testing
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Old 16-10-2013, 07:02   #3
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Re: Westerbeke 7.8 kW gen set water temperature gauge

If the sender is OK and the gauge is good too ... then there is a lose / cut wire somewhere along the way, I think. Check the wires with continuity meter - while keeping them disconnected from both gauge and the sender/s.

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Old 16-10-2013, 07:03   #4
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Re: Westerbeke 7.8 kW gen set water temperature gauge

BTW temp meter is resistance based. I think.

Temp alarm is an on/off contact (on this one removing the wire at senter and touching the engine block beeps the horn).

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