Exhaust sensor wire

[Tretatt]

I had my boat overheat on me and it melted the exhaust sensor wire that concets to the top of the manifold. I tried to chase the wire to see where it goes. It leads to the back of the boat somewhere. Any ideas? I need to replace this wire! Is this wire important or can I do without it? Please any help will do
Thanks

 

[thumpar]

What engine/drive do you have? A serial number would help. There is no exhaust sensor. Maybe an O2 sensor on a very new boat. Take some pics of what you are referring to.

 

[Tretatt]

Thanks for the reply!! The motor is a Volvo Penta 4.3GL-J. The wire melted from the exhaust riser. In the pictures I posted there is one on each side. The wire is disconnected and then I reconnected it to the exhaust riser. This is the good wire that is not melted. Thanks so much for any info you can give me.

 

[Tretatt]

I cannot get the photos to upload. It says the file is too big and exceeds the limit. I'll keep trying

 

[Tretatt]

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[Tretatt]

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[skydiveD30571]

That wire is for the exhaust overheat sensor. They are brass plugs installed to the back of both risers, and basically ground out when they reach a certain temperature which triggers an alarm.

How far back is it melted? I would just cut off the melted part and attach new wiring to connect to a new exhaust sensor.

 

[internetdel]

This may be what you need. http://www.michiganmotorz.com/sender-water-temperature-p-666.html