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Old 10-19-2014, 09:58 PM   #1
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ID sender locations FL120 please

So my manual doesn't tell me what's what concerning senders. I am wanting to replace my old worn out gauges with new SW units I have purchased. Can any FL120 gurus ID what I have circiled in the pics? The engine is a 2715E.





The tan hose goes to my water heater.
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Old 10-19-2014, 10:54 PM   #2
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Just and educated guess here from what is installed on mine.

Top photo:
One on the left is the temp gauge sending unit.
One on the right is for the engine high temp alarm.

Bottom Photo:
One on the left is an interlock for the charging system "operates on oil pressure, closes at 15 psi".
One on the top right is the oil pressure sending unit.
One on the bottom right is the engine oil pressure alarm "15 psi and falling".

Cheers,
Bob
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Old 10-20-2014, 07:39 AM   #3
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A simple way to figure it out is to remove the wires from each sender one at a time while the engine is running and see what gauge stops working. If no gauge stops reading then ground the wire and see what alarm goes off. That should narrow it down pretty quickly as to what's what.
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Old 10-20-2014, 07:45 AM   #4
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I think Bob's IDs are correct. The top ones would be tough from that pic...assuming no one changed the senders and gauges as the wiring color is usually a giveaway.

Wiring Color Codes
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Old 10-20-2014, 10:05 AM   #5
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Thanks guys. I will also call AD for some additional input.
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